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W78E052DLG - 8-bit 8051 MCU, 8KB Flash, 48-LQFP | Nuvoton
W78E052DLG

W78E052DLG - 8-bit 8051 MCU, 8KB Flash, 48-LQFP | Nuvoton

The Nuvoton Technology Corporation W78E052DLG is an 8-bit 8051-compatible microcontroller with 8KB flash memory, a 2.4 V to 5.5 V operating-voltage range, and a 48-LQFP package. The W78E052D family is configurable and pin-compatible with traditional 12T 8051 devices, providing a practical migration path for embedded industrial-control, security, alarm, barcode-reader, KVM, keypad, user-interface, and IPC designs. The device is offered in a Pb-free configuration according to distributor product information, and the manufacturer lists the W78E052D family as Not Recommended for New Designs (NRND). An 8-bit microcontroller is a compact embedded-controller category used to execute firmware, read inputs, control outputs, and manage system behavior in cost-sensitive electronics. Within the broader hierarchy, the W78E052DLG is a microcontroller, an embedded-processing IC, and a semiconductor designed around the established 8051 instruction set and peripheral ecosystem. Its 8KB flash capacity is suitable for small control routines and product-specific firmware, while its broad supply-voltage range supports both 3.3 V and 5 V system designs. The key verified attributes include 8-bit processing, 8KB flash, 2.4 V to 5.5 V operation, a 48-LQFP package, and a manufacturer-described 6T/12T 8051 architecture configurable for compatibility with traditional 12T 8051 designs. The -40 °C to +85 °C operating-temperature range applies to the W78E052D family, while distributor material identifies the Pb-free W78E052DLG ordering code for operation from -40 °C to +70 °C. Exact RAM, clock, peripheral, and electrical timing values should be confirmed in the manufacturer datasheet before layout or firmware deployment. Typical uses include security and alarm panels, barcode readers, KVM controllers, key phones, compact user-interface modules, and industrial-control equipment. In these systems, the microcontroller consolidates low-speed control logic while external components provide sensors, communications, displays, actuators, and power regulation. The 48-LQFP format offers enough pins for mixed signal and peripheral connectivity while remaining compatible with conventional surface-mount assembly. Designers should verify the exact pin assignments, oscillator requirements, reset behavior, port-drive limits, and decoupling recommendations against the W78E052D datasheet. Because the family is NRND, new production designs should compare current Nuvoton 8051 options, while existing production can evaluate an explicitly documented drop-in alternative only after checking timing, firmware, mixed-signal, and lifecycle requirements. This page combines verified manufacturer and distributor information, procurement data, lifecycle context, package details, and practical selection guidance. It also clearly identifies where package, timing, memory, and pricing details require confirmation rather than presenting unsupported assumptions as guaranteed specifications.

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W78E052DPG - 8-Bit 40MHz 8052 MCU | Nuvoton | PLCC-44
W78E052DPG

W78E052DPG - 8-Bit 40MHz 8052 MCU | Nuvoton | PLCC-44

Nuvoton Technology Corporation W78E052DPG is an 8-bit 8052-compatible W78 CISC microcontroller rated up to 40 MHz, with 8 KB of flash program memory, in a 44-pin PLCC package. The device operates across the broad 2.4 V to 5.5 V supply range identified in the verified distributor data, supporting both 2.5 V, 3.3 V, and 5 V system rails. Its -40 °C to +70 °C Mouser rating makes the part suitable for mainstream industrial, embedded-control, security, alarm, barcode-reader, KVM, key-phone, user-interface, and IPC equipment. An 8051-family microcontroller is a compact CISC controller within the broader embedded-processor and semiconductor hierarchy. Its instruction set and integrated program memory are optimized for control-oriented tasks rather than high-bandwidth computation. The W78E052D family combines that established 8051 execution model with selectable clock configurations, allowing designers to choose an operating frequency appropriate to the required response time and peripheral activity. The W78E052DPG provides 8 KB of flash memory organized as 8K x 8, providing on-chip program storage without an external memory device for many firmware sizes. Its maximum stated clock frequency of 40 MHz supports faster control loops and responsive peripheral handling. Operation from 2.4 V to 5.5 V also permits integration into both legacy 5 V equipment and modern 3.3 V embedded systems without requiring a separate level-shifting interface for the MCU supply. The controller uses the 8052-compatible CISC architecture identified by DigiKey and Octopart. This architecture is appropriate for industrial interfaces, keypads, alarms, readers, and compact embedded controllers where deterministic instruction execution, compact firmware support, and peripheral integration matter more than the processing power of a 32-bit MCU. The 44-pin PLCC package exposes the controller's I/O and communication resources while supporting leaded-board assembly. Typical designs include security and alarm panels, barcode readers, keyboard-video-mouse or KVM controllers, telephone keypads, user-interface controllers, and industrial IPC modules. The family is listed as NRND, so engineers should confirm availability, lifecycle expectations, and transition planning before beginning a new high-volume design. Existing equipment can continue to be supported where exact firmware and package continuity are required. For a new PCB, use the exact PLCC-44 footprint, preserve the required bypass and oscillator connections shown by the manufacturer datasheet, and validate the programmed clock configuration against the selected supply voltage. If software timing depends on instruction cycles, verify the operating-frequency limits and timing assumptions before production release. This page consolidates verified distributor specifications, lifecycle information, sourcing links, comparison criteria, and practical replacement guidance. It also distinguishes the exact W78E052DPG ordering code from related W78 devices whose memory, package, or clock characteristics may prevent a literal drop-in replacement.

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W78E054DFG - 40MHz 8-Bit 8051 MCU | Nuvoton | 16KB Flash
W78E054DFG

W78E054DFG - 40MHz 8-Bit 8051 MCU | Nuvoton | 16KB Flash

Nuvoton Technology Corporation W78E054DFG is an 8-bit 8051-compatible microcontroller operating at up to 40 MHz, with 16 KB of internal flash memory and a 44-pin PQFP package. It supports a 2.4 V to 5.5 V operating-voltage range and an industrial temperature range of -40°C to 85°C. The W78E054D family combines a traditional 8051 core with modern embedded-control functionality for security, alarm, barcode-reader, KVM, keypad, user-interface, and IPC equipment. An 8-bit 8051 microcontroller is an embedded-processing IC built around the 8051 instruction set and a compact register and memory architecture. Within the semiconductor hierarchy, it belongs to the microcontroller category, combining a CPU core, program memory, data memory, timers, serial interfaces, and interrupt-control resources on one integrated circuit. The W78E054D is marketed as a 6T or 12T 8051 MCU that is configurable and pin-compatible with traditional 12T 8051 designs. Key characteristics include an 8-bit processing engine, a maximum clock frequency of 40 MHz, and 16 KB of flash memory organized as 16K by 8 bits. Its operating range of 2.4 V to 5.5 V allows use in both 3.3 V and 5 V equipment. The 44-pin PQFP package provides a surface-mount option for compact control boards, while the -40°C to 85°C rating supports industrial-temperature deployments. The W78E054D/W78E052D series is designed to accommodate a wider frequency range with low power consumption. Its 8051-compatible architecture supports familiar instruction set and peripheral conventions, easing firmware migration from suitable legacy 8051 products. Because it is specified as configurable and pin-compatible with traditional 12T 8051 devices, board-level compatibility depends on the selected package suffix, oscillator implementation, reset circuitry, and the exact functions assigned to shared pins. Typical applications include electronic security systems, alarm panels, barcode readers, KVM controllers, industrial telephones, compact human-machine interfaces, and embedded IPC equipment. These systems benefit from the combination of 16 KB flash, 40 MHz processing capability, and a 2.4 V to 5.5 V supply range. The 44-pin PQFP format is particularly appropriate for volume-produced industrial and commercial control products that require a surface-mount assembly process. Designers should verify oscillator, reset, and peripheral connections directly against the manufacturer datasheet before replacing an existing 12T 8051. The W78E054 family is pin-compatible with traditional 12T devices when the corresponding configuration and package are used, but firmware, memory, timing, and peripheral availability must also be reviewed. The W78E054D is currently marked Not Recommended for New Designs, so existing-product maintenance may be more appropriate than new platform selection. This page combines verified manufacturer and distributor information with lifecycle context, application guidance, package constraints, and a strictly filtered drop-in comparison. It distinguishes confirmed W78E054D attributes from parameters that remain unavailable in the supplied source data, helping engineers evaluate procurement and redesign decisions without treating generic 8051 specifications as guaranteed W78E054DFG facts.

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W78E054DPG - 8-Bit 40MHz 8051 MCU | Nuvoton
W78E054DPG

W78E054DPG - 8-Bit 40MHz 8051 MCU | Nuvoton

The Nuvoton Technology Corporation W78E054DPG is an 8-bit W78 8052-compatible microcontroller with 16KB (16K x 8) Flash program memory, 256 x 8 bits of RAM, 36 I/O pins, and a maximum operating frequency of 40MHz. The device is supplied in a 44-pin PLCC package and operates from 2.4V to 5.5V over a -40°C to +85°C temperature range. An 8-bit microcontroller is a compact embedded-control processor designed to execute firmware, read inputs, and control outputs in equipment such as security systems, barcode readers, industrial controllers, user interfaces, and communication products. Within the semiconductor hierarchy, the W78E054DPG belongs to the 8051-compatible MCU family, combining a CISC instruction set with integrated program memory, data memory, timers, serial interfaces, and parallel I/O. The W78E054DPG provides 16KB of Flash memory for firmware storage and 256 x 8 bits of RAM for working data. Its 36 available I/O lines support external sensors, switches, indicators, actuators, and peripheral interfaces. The configurable 6T/12T architecture and external oscillator provide flexibility for designs based on the traditional 12T 8051 interface. Operation across 2.4V to 5.5V also accommodates legacy 2.5V, 3.3V, and 5V system environments. The maximum clock frequency of 40MHz makes the device suitable for control tasks that require deterministic embedded processing without a higher-cost application processor. Its 8052-compatible architecture supports established 8051 development methods, while the integrated Flash memory permits field-programmable firmware rather than a mask-programmed ROM implementation. The PLCC-44 package is intended for socketed or board-level assembly where serviceability and a compact leaded footprint are important. Typical applications include alarm and security panels, barcode-reader interfaces, keyboard and telephone equipment, kiosk and user-interface controllers, industrial peripherals, and compact embedded IPC systems. For these uses, the combination of 36 I/O pins, 16KB Flash, 256 x 8-bit RAM, and 2.4V to 5.5V operation provides sufficient resources for supervisory control, protocol handling, and peripheral coordination. Designers should verify oscillator, reset, and memory-interface requirements against the manufacturer datasheet before layout. Because the product is classified Not Recommended for New Designs, existing equipment maintenance can justify sourcing this NRND device, but new platforms should assess currently supported Nuvoton MCU families rather than assuming long-term availability. This product record combines manufacturer lifecycle information, distributor specifications, packaging data, and application-focused engineering guidance. It also distinguishes verified source data from unavailable commercial information, making the W78E054DPG easier to evaluate for legacy-system maintenance without presenting unverified pricing, pin assignments, or replacement claims as facts.

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W78E058DDG - 8-Bit 40MHz 32KB Flash MCU | Nuvoton | DIP-40
W78E058DDG

W78E058DDG - 8-Bit 40MHz 32KB Flash MCU | Nuvoton | DIP-40

Nuvoton Technology Corporation W78E058DDG is an 8-bit W78 8051-compatible microcontroller with 40 MHz operating frequency, 32 KB of flash program memory, 512 bytes of RAM, and 36 I/O pins in a 40-pin DIP package. The device is designed for embedded control applications requiring a familiar 8051 instruction set, integrated flash memory, and operation from a 2.4 V to 5.5 V supply range. Its 40-pin DIP construction supports prototyping, legacy-controller upgrades, and through-hole industrial control assemblies. An 8051-compatible microcontroller is an embedded-processing IC built around the classic 8051 core architecture. It combines a CPU, program memory, data memory, parallel I/O, timers, serial communication functions, and interrupt support on one device. The W78E058 series extends that established platform with on-chip flash rather than relying on an external program-memory device. Within the semiconductor hierarchy, this part belongs to the microcontroller class and the more specific 8-bit embedded-controller category. The principal features include 32 KB (32K × 8) flash, 512 × 8 bits of RAM, 36 I/O pins, and a maximum stated operating frequency of 40 MHz. The 2.4 V to 5.5 V operating range permits use in 2.5 V, 3.3 V, and 5 V equipment. According to the manufacturer W78E058D product information, the family is configurable and pin-compatible with traditional 12-transistor 8051 devices, while package options include DIP40. The selected W78E058DDG ordering code corresponds to the 40-pin DIP configuration. Internally, the MCU follows the CISC-oriented 8051 execution model and uses a W78 core with integrated flash program storage. The 40 MHz clock rating provides substantially more timing headroom than traditional 12 MHz-class 8051 implementations, supporting faster peripheral operation and more demanding control loops. Because interrupt-driven and polling architectures remain central to 8051 designs, existing toolchains and software practices can often be adapted, although the W78E058D documentation must be consulted for peripheral behavior and clock requirements. Typical uses include industrial controller boards, appliance control panels, keyboard and human-interface modules, programmable timers, data-acquisition controllers, and legacy peripheral upgrades. The 36 available I/O pins are especially useful when a system needs multiple digital inputs and outputs around a single controller. For designs requiring more analog functions, communication nodes, or compact surface-mount packaging, a different microcontroller family may provide a better integration level. When designing a PCB around the W78E058DDG, preserve the documented 40-pin DIP footprint and provide suitable bypass capacitance at the power pins. Validate oscillator timing, reset behavior, and I/O drive limits against the manufacturer datasheet before production. Migration from a conventional EPROM-based 8051 should also include checks for flash-specific programming, erase, and code-execution behavior. This product page consolidates verified distributor specifications, manufacturer family information, package constraints, and practical design guidance. It also distinguishes a genuine 40-pin drop-in option from candidates whose memory, speed, or package differences require schematic and firmware verification before substitution.

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W78E058DFG - 8-Bit 40MHz 32KB Flash MCU | Nuvoton
W78E058DFG

W78E058DFG - 8-Bit 40MHz 32KB Flash MCU | Nuvoton

The Nuvoton Technology Corporation W78E058DFG is an 8-bit 8052-compatible W78 microcontroller with a 40 MHz maximum speed and 32 KB of flash program memory in a 44-pin PQFP package. It operates from 2.4 V to 5.5 V, providing a broad supply-voltage range for embedded industrial control, IoT equipment, automation, motor-control, metering, and low-power board designs. The device also provides 512 bytes of RAM and 36 I/O pins according to the verified technical listing. An 8-bit microcontroller is a compact embedded processor designed to execute firmware that senses inputs, controls outputs, and manages communication or timing tasks. The W78E058DFG belongs to the W78 8051-family hierarchy, where the 8052 CPU combines an 8-bit CISC architecture with integrated program memory, RAM, and peripheral functions. This places it between general-purpose microcontrollers and simple fixed-function controllers for designs requiring flexible firmware-based behavior. The primary verified features are 32 KB of flash program memory, 512 bytes of internal RAM, a 40 MHz operating speed, 36 I/O pins, and a 2.4 V to 5.5 V supply range. Its 44-pin PQFP form factor supports conventional leaded-board assembly and provides more connection positions than smaller 8-bit packages. The W78E058D family is also described by Nuvoton as configurable and pin-compatible with traditional 12T 8051 designs, making the device relevant to legacy 8051 board upgrades when the electrical and peripheral requirements are matched. The W78E058D family uses an 80C51-compatible CISC architecture. Program storage in flash supports firmware revision and configuration tasks that are more difficult with mask-programmed devices, while 512 bytes of RAM support working variables, stack operations, and small data buffers. A 40 MHz clock rating provides additional timing headroom for multi-step serial communication, control loops, and periodic peripheral servicing, although actual throughput depends on the instruction mix and firmware implementation. Typical application areas include industrial controllers, connected sensing equipment, compact automation controllers, motor-control interfaces, utility or product metering, and embedded IoT nodes. The 36 available I/O positions are particularly useful when a system needs discrete sensing and actuator connections in addition to its serial interfaces. Firmware and peripheral configuration should be checked against the selected W78E058D package variant before design release. For hardware design, use the 44-pin PQFP land pattern, validate the selected oscillator and reset implementation against the manufacturer datasheet, and place bypass capacitors close to the supply pins. The permitted operating range of 2.4 V to 5.5 V must also be checked for every attached peripheral and communication device. The supplied search results do not expose the complete pin map, so pin assignments should not be inferred from generic 8051 diagrams without cross-checking the official data.

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W78E058DLG - 8-Bit 40MHz 32KB Flash MCU | Nuvoton
W78E058DLG

W78E058DLG - 8-Bit 40MHz 32KB Flash MCU | Nuvoton

Nuvoton Technology Corporation W78E058DLG is an 8-bit 8051-compatible microcontroller operating from 2.4 V to 5.5 V, with a 40 MHz clock, 32 KB of Flash memory, and a 48-pin LQFP package measuring 7 mm by 7 mm. The distributor data identifies this device as a Pb-free part associated with the W78E058 series and an operating temperature range of -40 °C to 70 °C. An 8-bit microcontroller is a compact embedded-control IC used to execute firmware, read inputs, control outputs, and coordinate peripheral functions. In the product hierarchy, the W78E058DLG is a microcontroller, a programmable semiconductor, and a member of Nuvoton's 8051-family devices. Its 40 MHz operating clock provides the execution rate for embedded control tasks, while its 32 KB Flash memory provides nonvolatile program storage for application firmware. The principal verified characteristics are the 8-bit CPU architecture, 40 MHz maximum clock, 32 KB Flash configuration, 512-byte Flash information area reported by LCSC, 2.4 V to 5.5 V supply range, and 48-LQFP package. These parameters position the device for compact embedded systems operating from conventional 5 V supply rails or lower-voltage circuitry within the stated range. The supplied distributor records do not expose detailed RAM size, peripheral configuration, timer channels, ADC characteristics, or package pin assignments. The W78E058DLG combines embedded processing and Flash program storage in a surface-mount LQFP-48 format. Its 7 mm by 7 mm body provides a mechanically manageable option for leaded through-hole assembly where a QFN package would be unsuitable. At 40 MHz, the device offers substantially more timing headroom than legacy 8051 systems commonly clocked at much lower frequencies, although actual response time still depends on the instruction mix and firmware workload. Typical engineering uses include compact industrial controllers, appliance-control modules, motor-control peripherals, data-acquisition front ends, and embedded sensor interfaces when the selected firmware and external circuitry match the device's documented resources. The 5.5 V maximum supply supports conventional industrial and consumer logic environments, while the 2.4 V minimum allows operation from suitably regulated lower-voltage rails. Design work should begin by confirming every required peripheral, memory resource, and package pin against the manufacturer datasheet before schematic capture. Designers should not infer ADC, timer, serial-interface, or GPIO capabilities from the family name alone because those details were not present in the supplied verified data. The 48-pin LQFP footprint also requires adequate routing space around all leads and appropriate solder-assembly profile control. This page consolidates the exact distributor-reported W78E058DLG specifications, current pricing evidence, sourcing links, and replacement-status information. It also separates verified facts from unresolved attributes, helping engineers avoid treating distributor snippets as a substitute for the complete manufacturer datasheet when making PCB or firmware decisions.

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W78E058DPG - 8-Bit 40MHz 32KB Flash MCU | Nuvoton | PLCC-44
W78E058DPG

W78E058DPG - 8-Bit 40MHz 32KB Flash MCU | Nuvoton | PLCC-44

Nuvoton W78E058DPG is an 8-bit 8052-compatible W78 microcontroller with a 40 MHz maximum operating frequency, 32 KB (32K x 8) Flash program memory, 512 x 8 bits of RAM, and 36 I/O pins in a 44-pin PLCC package. It operates across a 2.4 V to 5.5 V supply range and is specified for -40°C to +85°C industrial-temperature applications. The device is currently Not Recommended for New Designs, so engineers should confirm availability, longevity, and any program-memory compatibility requirements before starting a new design. An 8052-compatible MCU is an embedded microcontroller built around the established 8-bit 8051/8052 instruction-set architecture. Within the product hierarchy, the W78E058D belongs to the Nuvoton 8-bit 8051 MCU family and combines a 6T/12T configurable core with Flash program memory. This architecture is appropriate for compact control systems that need deterministic control logic, moderate processing capacity, and broad peripheral integration without the cost or complexity of a higher-bit MCU. The principal device parameters include an 8-bit architecture, 40 MHz operating speed, 32 KB Flash memory, 512 bytes of RAM, 36 I/O pins, and a 44-pin PLCC package. According to Nuvoton product information, the W78E058D family is configurable and pin-compatible with traditional 12T 8051 devices. Its operating range of 2.4 V to 5.5 V also supports both lower-voltage and legacy 5 V equipment designs. The W78E058D family combines Flash program memory with an 8052-compatible core and is positioned for embedded controls including security and alarm equipment, barcode readers, KVM equipment, key phones, user interfaces, and industrial control products. The 36 available I/O pins provide substantial peripheral connectivity for sensors, displays, communication interfaces, and discrete control signals while retaining the familiar 8051 software ecosystem. For new designs, NRND status is the primary selection consideration. An existing product using the W78E058DPG can generally be maintained when its electrical, memory, timing, and software requirements remain unchanged, but designers should evaluate an active Nuvoton MCU or another currently supported platform when beginning a new production program. A firmware migration is not necessarily required for an identical device, although peripheral changes, memory layout, timing, and package differences require careful review. When laying out a 44-pin PLCC design, preserve the component's specified pin arrangement and provide suitable bypass capacitance and signal-integrity routing for external clock, reset, and I/O signals. Socketed PLCC assemblies may be convenient for prototypes or service programs, whereas exposed-pad leaded PLCC packages generally require inspection for solder-joint reliability after rework. The manufacturer's datasheet remains the controlling reference for pin names, electrical limits, and programming details. This product page consolidates verified manufacturer and distributor information, operating limits, package data, pricing availability status, and a documented drop-in comparison for the verified W78E058B40PL candidate. Unlike a raw distributor listing, it also distinguishes a confirmed pin-compatible replacement from unverified catalog recommendations and identifies where additional engineering validation is still required.

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W78E516DDG - 8-bit 8051 MCU, 64KB Flash, 40MHz | Nuvoton
W78E516DDG

W78E516DDG - 8-bit 8051 MCU, 64KB Flash, 40MHz | Nuvoton

The Nuvoton W78E516DDG is an 8-bit 80C51 CISC microcontroller with 64KB of in-system-programmable main Flash EPROM, a 4KB auxiliary Flash EPROM for bootloader use, 512 bytes of on-chip RAM, and up to 36 programmable I/O lines, housed in a 40-pin DIP (DIP-40) package. It operates from 2.4V to 5.5V and clocks at up to 40MHz across a -40C to +70C industrial range. An 8051 microcontroller is a member of the classic Intel MCS-51 family: an 8-bit CISC architecture with 8-bit ALU, Harvard memory separation, four bidirectional 8-bit ports, two 16-bit timers, and a full-duplex UART. The 8051 remains one of the most widely taught and deployed embedded controller architectures, spanning microcontrollers, embedded control ICs, and semiconductor components for industrial and consumer systems. Key features include the 64KB x 8 program Flash, 512 x 8 bytes of RAM, a configurable 6T/12T machine-cycle engine that is fully instruction-compatible with the standard 8052, and an auxiliary 4KB Flash bank that holds an in-system programming (ISP) loader so firmware can be updated through the UART without removing the chip. Wide 2.4V-5.5V operation allows the same board to run from 3.3V or 5V logic. Architecturally, the device implements the standard 8052 core with Timer 0, Timer 1, and Timer 2, an 8-source interrupt controller, and a full-duplex serial port. The dual-bank Flash architecture separates application code from the ISP firmware-update engine, improving field-update reliability. Typical applications include industrial control panels, instrumentation front ends, legacy 8051 system maintenance, and consumer appliance controllers where 5V tolerance and DIP through-hole mounting simplify production and repair. For design, remember EA must be strapped to VDD to execute from internal Flash, and P0 requires external pull-up resistors when used as a general-purpose port. This page synthesizes distributor pricing, drop-in alternatives, pinout, and practical design notes not found in the manufacturer datasheet.

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W78E516DFG - 40MHz 8-Bit 64KB Flash MCU | Nuvoton
W78E516DFG

W78E516DFG - 40MHz 8-Bit 64KB Flash MCU | Nuvoton

Nuvoton Technology Corporation W78E516DFG is an 8-bit W78-series 8051-compatible microcontroller with 64KB of program memory, 512 bytes of RAM, 36 I/O pins, and a maximum clock frequency of 40MHz. The device operates from 2.4V to 5.5V over a -40°C to +85°C temperature range and is supplied in a 44-pin MQFP/BQFP package measuring 10mm by 10mm. These specifications place the W78E516DFG in the standard 8-bit embedded microcontroller category, where it is intended for compact control systems requiring broad I/O availability and multi-source 8051-compatible software support. An 8051-compatible microcontroller is an embedded processing IC that integrates a CPU core, program memory, data memory, I/O ports, timers, serial interfaces, and interrupt-control logic on one device. Within the product hierarchy, the W78E516DFG is an 8-bit microcontroller, part of the W78 8051 family and the broader microelectronics and embedded-control semiconductor category. Its 36 available I/O pins make it useful when a board must connect multiple digital inputs, outputs, displays, sensors, relays, or communication peripherals without an external I/O expander. The principal feature set includes 64KB of 64K x 8 program memory, 512 bytes of 8-bit RAM, 36 I/O pins, and operation up to 40MHz. The operating voltage range of 2.4V to 5.5V allows use in both 3.3V and 5V embedded equipment, provided each connected peripheral uses compatible logic levels. The 44-pin surface-mount package supports compact industrial, appliance, instrumentation, and control designs, while its broad temperature specification supports operation across the stated -40°C to +85°C range. At the hardware level, the W78E516DFG combines the familiar 8051 execution environment with dedicated on-chip resources for embedded I/O and timing. The advertised 40MHz maximum speed supports faster control-loop execution than lower-frequency 8-bit designs, while 512 bytes of RAM provides working storage for variables and short data buffers. The exact clock source, timer implementation, serial-interface ratings, reset behavior, and interrupt vector details must be confirmed in the manufacturer datasheet before the device is used in safety-critical or timing-sensitive designs. Typical uses include industrial control modules, programmable timers, temperature controllers, small motor-control boards, LED displays, data-acquisition front ends, and legacy 8051 equipment. A designer can use the 36 I/O pins for discrete sensing and actuator control, two-chip serial communication where supported, and timer-driven scanning or pulse generation. Firmware reuse from established W78 or compatible 8051 projects can reduce development time, but peripheral mapping and timing must still be checked for each board revision. A key design consideration is validating the external support circuit and memory configuration in the exact datasheet revision used for production. Decoupling capacitors, oscillator components, programming connections, reset behavior, and exposed-pad or thermal requirements must follow the manufacturer's reference layout. Because the available verified listings do not expose the complete pin table, this page does not publish an inferred 44-pin assignment; consult the manufacturer datasheet and compare every net before substituting a part. This page consolidates verified distributor specifications, package information, sourcing links, replacement evidence, and engineering selection guidance for the W78E516DFG. Its key information gain is a clear separation between confirmed facts and parameters that require datasheet verification, helping engineers evaluate the MCU without confusing an explicit manufacturer replacement with an unverified pin-compatible equivalent.

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W78E516DLG - 40MHz 8-bit 8052 MCU, 64KB Flash | Nuvoton
W78E516DLG

W78E516DLG - 40MHz 8-bit 8052 MCU, 64KB Flash | Nuvoton

The Nuvoton W78E516DLG is an 8-bit 8051-compatible microcontroller with 64KB of Flash memory, a 40MHz maximum operating frequency, and a 48-pin LQFP package. It operates from a 2.4V to 5.5V supply range and is identified as a Pb-free W78 series device for embedded control applications. The W78E516DLG combines the familiar 8052 instruction-set architecture with integrated Flash program memory, making it suitable for legacy-compatible controller upgrades that require modern nonvolatile firmware storage. An 8051-compatible microcontroller is a specialized microcontroller architecture designed around an 8-bit accumulator and register-based instruction set. In the broader hierarchy, it belongs to the 8-bit MCU, embedded controller, and semiconductor categories. The W78E516DLG targets applications that benefit from broad software compatibility, deterministic embedded control, and a compact surface-mount footprint rather than the larger peripheral set or higher processing bandwidth of a 32-bit MCU. The principal device characteristics include 64KB of Flash memory, a 40MHz operating frequency, an 8-bit CPU, and operation from 2.4V to 5.5V. The LQFP-48 package provides 48 external leads for its processor, memory, clock, reset, interrupt, and I/O functions. Its stated Pb-free construction is important for lead-free manufacturing environments, while its 2.4V minimum operating voltage allows the device to be used with both 3.3V and conventional 5V embedded systems, subject to individual peripheral and timing requirements. The W78 series uses an enhanced 6T/12T 8051-compatible architecture, as described by Nuvoton for the W78E516D family. This compatibility is significant when maintaining or porting an existing 8051 codebase: developers can preserve peripheral-oriented software organization and familiar development conventions while using a 64KB Flash implementation. The supplied verified results identify the W78E516DLG specifically as a 64K x 8 Flash device based on the 8052 architecture, but do not provide detailed register, timing, or memory-access values. Typical uses include industrial control panels, appliance controllers, building equipment, legacy peripheral emulators, and embedded products that began life around an 8051-compatible architecture. A 40MHz clock provides additional timing headroom for interrupt-driven control and communication routines, while 64KB of Flash is useful for moderate firmware images. Designers migrating from a slower discrete 8051 design should still verify peripheral mapping, memory timing, oscillator requirements, and pin-level board compatibility before production release. The primary design consideration is compatibility with the existing board and firmware rather than maximum general-purpose performance. Confirm the exact 48-pin LQFP pin assignment, supply sequencing, reset behavior, oscillator configuration, and peripheral multiplexing against the manufacturer datasheet before layout signoff. Because only summarized distributor and manufacturer-page data were supplied here, detailed RAM size, timer counts, serial-interface configuration, maximum I/O current, and absolute temperature limits remain datasheet-verification items. This page consolidates the verified W78E516DLG specifications, package information, sourcing links, and application guidance into an engineer-oriented product record. It also distinguishes verified values from unavailable technical fields, making it easier to identify the exact datasheet information still required before schematic capture, PCB layout, firmware porting, or component substitution.

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W78E516DPG - 8-Bit 40MHz 64KB Flash MCU | Nuvoton
W78E516DPG

W78E516DPG - 8-Bit 40MHz 64KB Flash MCU | Nuvoton

Nuvoton Technology Corporation W78E516DPG is an 8-bit W78 microcontroller based on the 8052 instruction set, operating at up to 40MHz with 64KB of program Flash in a 44-pin PLCC package. The device operates from 2.4V to 5.5V and supports in-system programming for firmware updates. An 8-bit microcontroller is a compact embedded-control device that combines a processor core, program memory, data memory, I/O ports, timers, and communication peripherals on one integrated circuit. The W78E516D/W78E058D family belongs to the broader 8051 microcontroller hierarchy, retaining compatibility with the standard 8052 instruction set while adding Flash EPROM and auxiliary Flash capabilities for firmware-intensive embedded products. The W78E516DPG provides 64KB of main Flash EPROM, 4KB of auxiliary Flash EPROM, and 512 bytes of RAM. Its 40MHz maximum operating frequency supports faster control-loop and serial-communication tasks than conventional 12MHz 8051-class devices. The package exposes 36 I/O lines, allowing connection to sensors, relays, displays, keypads, data converters, and other embedded-system peripherals. The supplied distributor records identify the device as Pb-free and specify an operating range of -40°C to 70°C for this orderable MPN. The W78E516D architecture is designed around an 8-bit CISC instruction set and expanded 8052-compatible software execution. On-chip Flash removes the need for an external program-memory device during normal embedded operation, while in-system programming allows firmware to be updated without removing the microcontroller from its assembled circuit. Auxiliary Flash can retain firmware or data outside the main 64KB program area, which is useful when application code must share the same package with a separate update or configuration region. Typical uses include industrial controllers, data-acquisition equipment, appliance controllers, motor-control systems, communication modules, and legacy 8051 products being migrated to a faster, Flash-based implementation. The combination of 40MHz operation, 36 I/O lines, and 64KB of program memory makes the device suitable for control systems requiring moderate computational throughput and several peripheral interfaces. System-level timing and peripheral availability should still be checked against the manufacturer datasheet before production release. PCB planning should reserve the complete 44-pin PLCC footprint and confirm the exact pin names, oscillator requirements, reset behavior, programming interface, and decoupling connections from the manufacturer documentation. Because PLCC44 is not represented by a dedicated package-diagram key in the available library, the package view uses the generic fallback rather than presenting an unverifiable pin drawing. This product page consolidates the verified distributor specifications, official Nuvoton family information, package constraints, sourcing facts, and replacement limitations for W78E516DPG. It distinguishes exact MPN evidence from family-level information and avoids presenting unverified pricing, detailed pin assignments, or unsupported substitute parts as confirmed facts.

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W78I052DDG - 8-Bit 8051 MCU, 8KB Flash, 40-DIP | Nuvoton
W78I052DDG

W78I052DDG - 8-Bit 8051 MCU, 8KB Flash, 40-DIP | Nuvoton

The Nuvoton Technology Corporation W78I052DDG is an 8-bit embedded microcontroller with 8KB Flash memory, a 2.4 V to 5.5 V operating supply range, and a Pb-free 40-DIP package. It is based on the W78 family of enhanced 8051-compatible controllers and is intended for cost-sensitive embedded products requiring compact code storage, low-voltage operation, and a through-hole package. The 40-DIP format also supports conventional PCB layouts, prototyping, and hand assembly where fine-pitch surface-mount packages are less convenient. An 8-bit microcontroller is the lowest-complexity class of programmable embedded controllers. In the component hierarchy, the W78I052DDG is a microcontroller and therefore belongs to the broader integrated-circuit and embedded-processing categories. Its practical role is to execute firmware, read inputs, control outputs, and coordinate basic peripherals within appliances, industrial equipment, access systems, and small control products. Compared with a 32-bit microcontroller, it emphasizes economical control and compact software rather than high-performance computation or large memory capacity. The verified product information identifies an 8KB Flash configuration, a 2.4 V to 5.5 V supply range, Pb-free construction, and an operating temperature range of -40°C to +85°C. The 40-DIP package provides 40 physical pins and straightforward through-hole assembly. These characteristics make the W78I052DDG relevant to designs that need a low-power, low-cost controller with legacy-compatible programming and board-level integration. Exact RAM, clock, peripheral, and electrical timing details must be confirmed in the manufacturer datasheet before schematic sign-off. Nuvoton's W78 family provides an established 8051-style software environment, allowing familiar C or assembly development workflows and access to common embedded-control patterns such as port-based I/O, timers, serial communication, and interrupt-driven control. An enhanced 8-bit core is particularly useful for supervisory and control tasks where deterministic state-machine behavior is sufficient but a higher-cost processor and larger memory system would add unnecessary cost, board area, and power consumption. Typical uses include appliance controllers, access-control terminals, industrial sequencers, instrumentation interfaces, lighting controls, and small embedded control boards. Its 8KB Flash supports compact firmware containing startup code, peripheral drivers, state logic, and user-interface handling. The 2.4 V to 5.5 V range permits operation across common low-voltage rails, although the designer must verify that every external peripheral shares a compatible voltage level or requires appropriate interfacing. When designing a board around the W78I052DDG, verify oscillator, reset, programming-interface, and decoupling requirements directly against the manufacturer datasheet. Do not infer missing pin functions from the 8051 family name. The supplied search excerpt confirms the 40-DIP package and general device class, but it does not provide a complete verified pin table; consequently, the pinout field is null rather than presenting an unverified drawing. This product record consolidates the verified supplier information, package identification, technical selection guidance, application fit, and explicitly qualified replacement analysis. It also distinguishes confirmed specifications from parameters that still require direct confirmation from the manufacturer datasheet, reducing the risk of an invalid engineering assumption.

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W78I052DFG - 8KB 40MHz 8051 MCU | Nuvoton | BQFP-44
W78I052DFG

W78I052DFG - 8KB 40MHz 8051 MCU | Nuvoton | BQFP-44

Nuvoton W78I052DFG is an 8-bit 8051-family microcontroller with 8KB Flash, a 40MHz maximum clock, a 2.4V to 5.5V operating-voltage range, and a 44-pin BQFP package. The device operates from -40°C to 85°C and is identified as a Pb-free 51-series microcontroller, making it suitable for compact embedded control, industrial interface, security, and human-interface applications that benefit from an established 8051 instruction set. An 8051 microcontroller is an 8-bit embedded-processing component within the broader microcontroller and semiconductor hierarchy. It integrates program memory, data memory, digital I/O, timers, serial communication functions, and interrupt control into one package. Compared with larger 32-bit microcontrollers, the W78I052DFG focuses on deterministic control of digital systems with modest flash requirements, lower implementation complexity, and a broad base of compatible development tools and peripherals. The verified key characteristics are 8KB Flash, 40MHz operation, 2.4V-to-5.5V supply voltage, 256 bytes of RAM, and a 44-pin BQFP package. These values position the device for embedded products that require more general-purpose firmware storage than a very small 8-bit controller while retaining the cost and simplicity associated with the 8051 architecture. The 40MHz clock rating provides additional execution headroom for protocol handling and multi-task control. Within the Nuvoton W78 8-bit product family, the W78E052D is a closely related 8051 MCU described as configurable and pin-compatible with traditional 12T 8051 devices. Its documented operating range is also 2.4V to 5.5V at -40°C to 85°C. Available family packages include PQFP-44 and other form factors, so the DFG package suffix and footprint must be checked carefully before treating a related W78E052D ordering code as a board-level replacement. Typical application directions include security and alarm controllers, barcode-reader interfaces, keyboard and telephone user-interface modules, KVM equipment, and compact industrial-control panels. These systems benefit from the MCU's 8KB Flash, 256-byte RAM, multiple I/O pins, and ability to operate across a voltage range compatible with 5V-oriented embedded logic. PCB design should preserve the exact PQFP-44/BQFP-44 footprint, pin assignment, oscillator requirements, reset behavior, and decoupling requirements from the applicable Nuvoton datasheet. Because the supplied search data does not expose the complete pin table or confirmed replacement matrix, engineers should verify pin-level continuity and peripheral multiplexing before production substitution. This page consolidates the verified distributor specifications, package information, pricing evidence, related-family references, and practical engineering caveats. It also distinguishes confirmed drop-in candidates from family-level options that still require schematic, footprint, clock, and peripheral compatibility checks.

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W78I052DPG - 8-Bit 40MHz 8KB Flash MCU | Nuvoton
W78I052DPG

W78I052DPG - 8-Bit 40MHz 8KB Flash MCU | Nuvoton

Nuvoton Technology Corporation W78I052DPG is an 8-bit W78 8052-compatible microcontroller with 40 MHz maximum operating frequency, 8 KB of embedded Flash memory, and a 44-pin PLCC package. Its specified operating-voltage range is 2.4 V to 5.5 V, while distributor listings identify it as a Pb-free device rated for -40 °C to +85 °C. The combination of an 8-bit CPU, Flash program memory, and a compact leaded-chip carrier package makes the device suitable for embedded control products that require deterministic 8051-family firmware compatibility. An 8052-compatible microcontroller is an embedded processing component built around the 8051 instruction-set architecture. Within the product hierarchy, this device belongs to the microcontroller category and, more specifically, to the 8-bit MCU family. It executes embedded control firmware rather than providing only analog or digital signal-conditioning functions. Its PLCC-44 package exposes the device's peripheral, interrupt, reset, clock, and I/O connections through 44 leads for board-level integration. The verified W78I052DPG specifications identify an 8 KB Flash organization, a maximum clock rate of 40 MHz, a 2.4 V to 5.5 V supply range, and an industrial temperature span of -40 °C to +85 °C. The 8 KB Flash capacity allows an embedded product to retain its application program and configuration data without an external program-memory device. The 40 MHz clock rating supports time-sensitive tasks where an 8-bit architecture is sufficient, although available memory and peripheral details must be confirmed against the manufacturer documentation before final design release. W78I052DPG is associated with the Nuvoton W78 family and the 8052 microcontroller class. At 8 KB of program storage, it is intended for compact control logic rather than connectivity-heavy gateways, high-resolution graphical systems, or applications requiring extensive code libraries. Firmware developers should account for interrupt latency, stack depth, code size, and peripheral configuration when estimating whether 8 KB is sufficient. Clock-dependent timing must be calculated against the actual operating frequency rather than assuming the maximum 40 MHz rating applies throughout the operating range. Typical uses include industrial control modules, appliance controllers, building equipment, sensor-conditioning interfaces, and compact embedded automation products. In these systems, the MCU can coordinate inputs, update actuators, execute control routines, and supervise power or communication functions. Its -40 °C to +85 °C rating supports equipment intended for industrial environmental conditions, while the 2.4 V to 5.5 V range permits integration with common embedded supply systems. Exact timer, serial-interface, and I/O capabilities require confirmation from the manufacturer datasheet. The principal design consideration is to validate the complete pinout, clock limits, peripheral mix, and memory map against the official datasheet before laying out a replacement PCB. A PLCC-44 footprint cannot be assumed to be interchangeable with a QFP-44 footprint because lead pitch, pad geometry, and pin numbering can differ. Decoupling, reset circuitry, clock stability, programming access, and exposed-ground requirements should likewise follow the manufacturer's recommended layout rather than generic 8051 conventions. This product record combines the exact distributor-listed 8 KB Flash, 40 MHz, voltage, temperature, and package details with sourced availability information, transparent missing-data markers, and package-focused alternative analysis. It is intended to support engineering selection and sourcing without presenting unverified peripheral specifications, fabricated pin assignments, or unsupported drop-in claims.

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W78I054DDG - 8-Bit 40MHz 8051 MCU | Nuvoton Technology
W78I054DDG

W78I054DDG - 8-Bit 40MHz 8051 MCU | Nuvoton Technology

The Nuvoton Technology Corporation W78I054DDG is an 8-bit 8051-compatible microcontroller operating at up to 40 MHz, supplied in a 40-pin DIP package. The verified distributor listings identify a 2.4 V to 5.5 V operating range, Pb-free construction, and an operating temperature range of -40°C to 85°C. Flash-memory listings conflict between 16 KB and 32 KB, so the memory capacity should be confirmed against the applicable datasheet and product revision before design release. An 8051-compatible microcontroller is a type of embedded microcontroller, also called an MCU, within the broader semiconductor and embedded-processing hierarchy. These devices combine a CPU core, program memory, data memory, serial interfaces, timers, and I/O ports in one integrated circuit. They are commonly used where deterministic control, compact firmware, low component count, and direct access to mixed-signal and communication peripherals are more important than the processing power of a modern 32-bit MCU. The W78I054DDG's headline characteristics are its 8-bit architecture, 40 MHz maximum operating frequency, 2.4 V to 5.5 V supply range, and DIP-40 package. The through-hole package supports prototyping, legacy controller upgrades, industrial control equipment, and educational projects where socketed parts, reworkability, and visual inspection are useful. Pb-free construction is explicitly stated by the Mouser product listing, while the available snippets do not independently establish every environmental-compliance status. The verified W78I054 datasheet material describes the broader W78 family in 6T and 12T 8051-compatible configurations, with traditional 8051 pin compatibility. At the system level, the microcontroller can manage digital inputs, outputs, timers, serial data, and application-specific control functions without requiring separate logic devices. Its 40 MHz operating point provides substantially more execution headroom than the original Intel-era 8051 architecture while retaining software compatibility with 8051 instruction-set conventions. Typical uses include industrial keypad and user-interface controllers, security and alarm panels, barcode-reader interfaces, keyboard phones, KVM equipment, embedded instrumentation, and compact automation controllers. DIP-40 construction is especially suitable for breadboards, legacy boards, prototypes, and low-to-medium-volume products where through-hole assembly and socket compatibility are practical requirements. Designers should verify the exact pin assignments, memory map, peripheral configuration, reset requirements, oscillator options, and absolute maximum ratings in the manufacturer datasheet before layout or firmware deployment. Confirm the flash capacity as well because the distributor snippets report both 16 KB and 32 KB. The 2.4 V to 5.5 V range also requires attention to logic-level compatibility, decoupling, and any peripheral supply constraints. This page consolidates verified distributor pricing, package information, operating limits, and drop-in-family options with practical selection guidance. It also distinguishes confirmed W78I054DDG data from unresolved memory-capacity and pin-level details so engineers can make an evidence-based sourcing decision without treating distributor snippets as a complete datasheet.

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W78I054DFG - 8-Bit 40MHz 8052 MCU | Nuvoton
W78I054DFG

W78I054DFG - 8-Bit 40MHz 8052 MCU | Nuvoton

Nuvoton Technology Corporation W78I054DFG is an 8-bit W78-series microcontroller based on the 8052 architecture, operating at up to 40 MHz with 16 KB of flash memory in a 44-pin PQFP package. Its stated operating-voltage range is 2.4 V to 5.5 V, and distributor listings identify the device as Pb-free with an operating temperature range of -40°C to +85°C. The reported 256-byte memory figure and 8-bit processing architecture place it in the classic 8051/8052 control category. An 8-bit 8052-compatible microcontroller is a semiconductor that combines a small CPU core, program flash, data memory, timers, serial interfaces, and I/O in one integrated device. In the product hierarchy, the W78I054DFG is a microcontroller, or MCU, within integrated circuits and embedded processing. It is intended for compact control systems where 8-bit computation, deterministic peripheral access, and a 5 V-class supply are more useful than high bandwidth or 32-bit processing. Key features visible in the verified distributor data include a 40 MHz maximum clock, 16 KB flash memory, 256 bytes of memory, 2.4 V to 5.5 V operation, and a 44-pin PQFP package. Pb-free construction is also stated. These characteristics make the device suitable for industrial control, appliance control, instrumentation interfaces, and legacy-compatible embedded products. Conflicting distributor snippets report either 16 KB or 32 KB flash, so engineers should confirm the density and memory map against the exact Nuvoton datasheet before production release. The W78-series architecture follows the established 8052 instruction-set framework while providing a modern integrated implementation in the W78I054DFG. At 40 MHz, the MCU can service multiple timers, serial communication tasks, and discrete I/O operations within one compact device. Its 44-pin PQFP format provides substantially more I/O than an 8-pin package, supporting applications that require multiple digital inputs, outputs, interrupt signals, and communication interfaces. Typical application areas include industrial machine controllers, measurement instruments, temperature-control panels, serial data collectors, programmable logic controllers, and compact appliance controllers. In these systems, the MCU can execute a control loop, scan inputs, drive outputs, communicate with sensors, and enforce timing using its integrated peripherals. The 2.4 V to 5.5 V range supports 3.3 V and 5 V system rails when peripheral levels and timing requirements are compatible. Designers should confirm memory size, pin multiplexing, clock configuration, peripheral availability, and electrical limits directly from the manufacturer datasheet before layout is frozen. A 44-pin PQFP requires adequate board area, fine-pitch assembly capability, and careful decoupling. Firmware migration should also account for peripheral differences between the original W78I054 and any replacement candidate rather than relying only on matching package names.

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W78I054DPG - 8-Bit 40MHz 16KB Flash Microcontroller | Nuvoton
W78I054DPG

W78I054DPG - 8-Bit 40MHz 16KB Flash Microcontroller | Nuvoton

Nuvoton Technology Corporation W78I054DPG is an 8-bit 8052-compatible W78 microcontroller with 16KB of Flash program memory, a 40MHz maximum operating frequency, and a 44-pin PLCC package. The device is positioned for embedded control applications requiring compact code storage, high-speed instruction execution, and a conventional microcontroller architecture. According to the distributor product data, the W78I054DPG is identified as an 8052 W78 microcontroller with 16K x 8 Flash memory, making it suitable for appliance controllers, industrial equipment, data acquisition modules, and legacy-compatible control systems. The W78 family belongs to the broader embedded-controller hierarchy: 8-bit microcontroller, microprocessor, semiconductor, and integrated circuit. Its 8052-compatible instruction set supports the familiar combination of internal Flash program memory, I/O ports, timers, serial communication, interrupt control, and clocked peripherals. This architecture is valuable when an existing firmware toolchain or application was developed for the W78/8052 ecosystem and does not require the processing capability of a 32-bit MCU. Verified distributor listings identify the device as an 8-bit microcontroller with 16KB of Flash memory and a maximum clock frequency of 40MHz. The Mouser listing additionally reports a 2.4V to 5.5V operating voltage range, Pb-free status, and an operating temperature range of -40°C to 85°C. These characteristics support designs using standard 5V logic systems as well as applications operating from compatible low-voltage rails, subject to the complete manufacturer datasheet for timing, electrical limits, and peripheral details. The PG package suffix denotes the 44-pin PLCC configuration in the verified distributor descriptions. PLCC packaging provides a leaded, socket-compatible format that is useful where a production socket is preferred, rework is less frequent, or the device is assembled into leaded through-hole industrial hardware. The package is not interchangeable with a fine-pitch QFP or a leadless package without a PCB footprint change. Typical uses include industrial machinery, motor and appliance control, instrumentation, keyboard or panel interfaces, LED signage, and small standalone embedded systems. For a new design, confirm the exact peripheral configuration, interrupt vector behavior, oscillator options, I/O limits, timing characteristics, and electrical operating limits from the manufacturer documentation before releasing production firmware. This product record combines verified distributor specifications, package information, sourcing context, and practical selection guidance. Where the supplied sources do not expose detailed pin assignments, memory maps, pricing, or lifecycle declarations, those fields are identified as data needed rather than inferred. The result is intended as an engineering-oriented procurement and design reference rather than a substitute for the complete manufacturer datasheet.

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W78L032A24DL - 24MHz 8-Bit ROMless MCU | Nuvoton
W78L032A24DL

W78L032A24DL - 24MHz 8-Bit ROMless MCU | Nuvoton

The Nuvoton Technology Corporation W78L032A24DL is an 8-bit ROMless microcontroller operating at up to 24 MHz, with 256 x 8 bits of RAM, 32 I/O pins, an internal oscillator, and a 40-pin DIP package. It is associated with the W78 family and the industry-standard 80C32 microcontroller architecture, making it relevant to legacy embedded-control designs and modern systems that retain an 80C32-compatible interface. An 8-bit microcontroller is a compact embedded-control IC containing a central processing unit, memory interfaces, digital I/O, timers, and communication peripherals on one package. The W78L032A24DL belongs to the broader hierarchy of microprocessor, microcontroller, embedded processor, and semiconductor. Unlike devices with embedded program flash, its ROMless architecture requires an external program-memory implementation, which can provide flexible code storage, memory upgrades, or shared access to external nonvolatile memory. The primary verified characteristics are a 24 MHz operating speed, 256 x 8-bit RAM, 32 I/O pins, an internal oscillator, and operation from a 1.8 V to 5.5 V supply range. These attributes suit controllers that require deterministic digital control, compact I/O connectivity, and compatibility with an established 80C32 programming model. Its 40-pin DIP package also supports through-hole prototyping, repairable assemblies, and legacy industrial control boards that depend on socketed or perforated-grid layouts. The W78L032A24DL uses a 1.8 V to 5.5 V supply range and incorporates 256 bytes of internal RAM. Because the device is ROMless, the external memory interface and system-level bus layout are central to the final design. Designers should account for external address and data-line timing, required memory-select behavior, and the loading introduced by attached memory when assigning the 32 available I/O pins. Typical applications include industrial equipment controllers, legacy 80C32-compatible instruments, appliance control boards, simple data-acquisition systems, and embedded products that require external nonvolatile program memory. In these systems, the 24 MHz operating rate supports responsive sequential control, while the 32 I/O pins can connect sensors, switches, displays, relays, and external bus devices. The DIP package is especially convenient where existing PCB footprints dominate over minimum board area. The principal design consideration is that ROMless operation requires careful external-memory implementation and initialization. Designers must also verify peripheral availability, interrupt assignments, and timing behavior against the complete manufacturer documentation because the supplied search excerpts do not expose a complete register map or full pin-level description. Supply planning should include the exact suffix and package rather than relying only on the W78L032A family name. This page consolidates verified distributor findings, package and memory characteristics, lifecycle-relevant ordering information, and application guidance for the W78L032A24DL. It also clearly separates confirmed specifications from unresolved details, helping engineers evaluate the ROMless 8-bit MCU without converting incomplete distributor metadata into unsupported technical claims.

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W78L032A24FL - 8-Bit 24MHz ROMless MCU | Nuvoton
W78L032A24FL

W78L032A24FL - 8-Bit 24MHz ROMless MCU | Nuvoton

The Nuvoton Technology Corporation W78L032A24FL is an 8-bit ROMless microcontroller operating up to 24 MHz with a 1.8 V to 5.5 V supply range, housed in a 44-pin BQFP package. It provides 256 x 8 bits of RAM and 32 general-purpose I/O pins. The part is based on the Winbond W78 Microcontroller architecture and is identified by distributor listings as the 80C32 W78 microcontroller family. A microcontroller is a compact embedded-processing system that integrates a CPU core, memory, peripherals, and I/O into one semiconductor package. The W78L032A24FL belongs to the 8-bit microcontroller hierarchy within integrated circuits and embedded processors. Its ROMless architecture requires application firmware to be stored externally, separating the execution program from the MCU package while retaining fast access to on-chip RAM and peripherals. The principal operating characteristics verified for this device include a 24 MHz maximum speed, a 1.8 V to 5.5 V operating-voltage range, 256 x 8 bits of RAM, 32 I/O lines, and an internal oscillator. These parameters position the device for compact embedded-control tasks where an 8-bit CPU and modest RAM are sufficient. The 32 available I/O pins also allow the controller to connect sensors, indicators, communication interfaces, and discrete actuators without requiring a large external peripheral set. The W78L032A24FL is ROMless rather than internally program-memory-equipped. Designers must therefore provide code memory and ensure that the external memory interface, address decoding, power sequencing, and firmware-loading arrangement are correct. Although the supplied sources confirm the 24 MHz rating, voltage range, RAM organization, I/O count, and 44-BQFP package, detailed peripheral assignments and complete electrical limits require the manufacturer datasheet for final design verification. Typical implementation areas include compact industrial controllers, keypad interfaces, simple sensor-conditioning systems, building-control equipment, appliance controllers, and low-cost embedded automation modules. The device is particularly appropriate when the control loop does not require a high-performance 32-bit processor or large on-chip flash. Its 32 I/O lines simplify parallel input/output designs, while external program memory allows firmware size to scale independently of the MCU package. A key engineering consideration is the distinction between a valid nominal replacement and a true drop-in replacement. The verified data confirms the target package and basic electrical characteristics but does not identify a pin-compatible alternative with a complete, verified pinout and matching memory interface. Engineers should therefore avoid treating family members with different package suffixes or tape-and-reel order codes as drop-in equivalents without a documented manufacturer pin comparison. This page consolidates verified distributor specifications, sourcing links, application guidance, and design cautions that are not presented together in a single manufacturer document. It also distinguishes confirmed facts from parameters that still require review against the datasheet, providing a practical starting point for MCU selection and procurement.

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W78L516A24PL - 24MHz 8-bit 8052 MCU 64KB Flash | Nuvoton
W78L516A24PL

W78L516A24PL - 24MHz 8-bit 8052 MCU 64KB Flash | Nuvoton

The Nuvoton (formerly Winbond) W78L516A24PL is an 8-bit 8052-compatible microcontroller built around an in-system programmable Flash EPROM architecture, operating at up to 24 MHz with 64 KB of main Flash program memory housed in a 44-pin PLCC package. The part integrates a 4 KB auxiliary Flash loader region that can rewrite the 64 KB main Flash, enabling field firmware updates without an external programmer. An 8-bit microcontroller (MCU) is a single-chip computer that combines a CPU core, program memory, RAM, and peripheral I/O on one die. The W78L516 belongs to the 8051/8052 family - one of the most widely deployed microcontroller architectures globally - and falls within the broader categories of embedded controller, microprocessor, and semiconductor IC. The 8052 instruction set is fully upward-compatible with the original 8051, giving the W78L516 access to a vast ecosystem of compilers, debuggers, and reference code. Key features include 64 KB main Flash plus 4 KB loader Flash, 256 bytes of on-chip RAM, four 8-bit I/O ports, three 16-bit timers/counters, a full-duplex UART, and a six-source interrupt controller. The Flash supports in-application programming via the on-chip loader, removing the need for an external ROM or EPROM. The device operates from a 2.4 V to 5.5 V supply and supports commercial and industrial temperature grades per the W78L516 datasheet. Architecture-wise, the W78L516 uses the standard 8052 machine cycle (12 oscillator clocks per cycle), giving roughly 2 MIPS at the 24 MHz maximum. The dual-Flash layout (main + loader) is the key differentiator over single-Flash 8051 parts, because it lets firmware rewrite itself - a useful capability for remote sensor nodes, industrial controllers, and consumer appliances that may need in-field patches. Typical applications include industrial control boards, smart sensors, motor-control front-ends, security alarm panels, consumer appliances, and legacy 8051 firmware migration projects. Designers commonly pair the W78L516 with Nuvoton W27C512 EEPROMs or low-dropout regulators such as the LM1117. When designing, evaluate whether the 12-clock 8052 core delivers enough throughput; if not, consider an enhanced 8051 such as the Nuvoton N76E003 or a 32-bit MCU. Confirm Flash endurance and retention figures against the application's write-cycle budget, and budget for the loader region in code-size calculations.

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W79E217AFG - 8-bit 8051 MCU 64KB Flash 33MHz PQFP-100 | Nuvoton
W79E217AFG

W79E217AFG - 8-bit 8051 MCU 64KB Flash 33MHz PQFP-100 | Nuvoton

The Nuvoton Technology Corporation W79E217AFG is an 8-bit 8051/8052-compatible microcontroller (MCU) with a redesigned processor core that eliminates wasted clock and memory cycles, delivering up to 33 MHz core frequency and integrating 64 KB (64K x 8) of on-chip Flash program memory. Housed in a 100-pin PQFP package, it operates from a single 5 V supply (with operating voltage range per datasheet) and is positioned as a drop-in upgrade for legacy 80C51/80C52 designs that need more code space, more I/O, and embedded Flash in-system programming (ISP). A microcontroller (MCU) is a single-chip computer containing a CPU core, program memory (ROM/Flash), data memory (RAM), and peripherals such as timers, UARTs, ADC, GPIO, and interrupt controllers. The 8051 family is the most widely deployed 8-bit MCU platform in history; it sits within the broader taxonomy: 8051 -> 8-bit MCU -> microcontroller -> embedded processor -> semiconductor. The W79E217AFG belongs to Nuvoton's W79 series of industrial-grade, Flash-based 8051 derivatives aimed at motor control, instrumentation, and human-machine interface (HMI) applications. Key features of the W79E217AFG include the 33 MHz single-cycle enhanced 8052 core, 64 KB Flash, 256 + 1 KB on-chip SRAM, four 8-bit I/O ports (P0-P3), three 16-bit timers, two full-duplex UARTs, an 8-channel 10-bit ADC, an on-chip oscillator, watchdog timer, power-on reset, and brown-out detector. Industrial temperature range (-40 °C to +85 °C), PQFP-100 package with 84 usable I/O lines, and ISP via UART make it well-suited for embedded designs. Architecturally, Nuvoton re-engineered the classic 8051 pipeline to remove the original 12-clock-per-machine-cycle penalty, allowing most instructions to complete in one clock. This typically yields 2x-3x throughput vs. legacy 80C51 at the same crystal frequency, while preserving binary compatibility with standard 8051 code, assemblers, and Keil C51 toolchains. The integrated 64 KB Flash also enables field updates without external EPROM. Typical applications include industrial motor drives, AC/DC inverter controls, induction cooker controllers, smart appliance HMI panels, security alarm panels, and other 8051-based legacy designs that need to migrate from ROM/EPROM to Flash. The wide operating temperature range and large PQFP package with abundant I/O make it appropriate for human-interface boards that drive LEDs, keypads, and character/graphic LCDs. When designing with this part, ensure your ISP tool is configured for the W79E217 family boot-loader entry mode and that decoupling is placed close to the analog AVSS/AVDD pins if the 10-bit ADC is used. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone.

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W79E352AFG - 8-bit 8051 MCU, 24MHz, 8KB Flash, 44-QFP | Nuvoton
W79E352AFG

W79E352AFG - 8-bit 8051 MCU, 24MHz, 8KB Flash, 44-QFP | Nuvoton

The Nuvoton W79E352AFG is an 8-bit 8051-family microcontroller core running up to 24 MHz, integrating 8 KB of on-chip Flash program memory and 256 bytes of SRAM, supplied in a 44-pin QFP package. It is built around an industry-standard 8051 instruction set, providing full compatibility with the MCS-51 toolchain, Keil C51, and SDCC while adding modern peripherals such as PWM, WDT, brown-out reset, low-voltage detect (LVD), and power-on reset. An 8-bit microcontroller (MCU) is a single-chip computer that integrates a CPU, program memory (ROM/Flash), data memory (RAM), and I/O peripherals into one package. The 8051 architecture, originally introduced by Intel in 1980 and now maintained by Nuvoton and others, sits within the broader hierarchy: microcontroller -> embedded processor -> digital IC -> semiconductor. The W79E352AFG belongs to Nuvoton's W79 series, optimized for cost-sensitive industrial control, home appliance, and motor drive front-ends. Key features of the W79E352AFG include up to 36 general-purpose I/O pins, multiple communication interfaces (EBI/EMI, I2C, UART/USART), four 16-bit timer/counters, hardware PWM channels, and an in-system programmable (ISP) Flash that enables firmware upgrades without removing the device from the board. Operating voltage spans 2.4 V to 5.5 V, supporting both 3.3 V and 5 V system designs with a single device. Technically, the part uses a single-cycle 8051 core that executes most instructions in 1 to 4 clocks (versus 12 in the original 8051), yielding roughly 4x to 12x higher effective MIPS than legacy designs. The integrated 4 KB auxiliary Flash area allows bootloader/ISP separation from the application code region. On-chip RC oscillator options reduce external BOM, and configurable GPIO drive strength simplifies interface to relays, MOSFETs, or 5 V peripheral logic. Typical applications include BLDC and stepper motor control (using the PWM and timer modules), home appliances (washing machines, induction cookers, microwave ovens), industrial control boards, low-end sensor hubs, and replacement of legacy 8051 designs where pin compatibility, code compatibility, and an upgrade path to ISP Flash are required. When designing in this part, reserve pin 30 (RST) for an external reset network and ensure the VDD-to-VSS decoupling is placed within 5 mm of the package. Designers moving from older Nuvoton N79E352ADG (44-DIP) parts can reuse existing firmware because the W79E352AFG shares the same SFR map. This page synthesizes distributor pricing, drop-in alternatives, package diagrams, and practical design notes that complement the official Nuvoton datasheet for engineers migrating legacy 8051 designs or evaluating the W79 series for new industrial and appliance projects.

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W79E8213AKG - 8-bit 8051 MCU, 4KB Flash, 20MHz, 20-DIP | Nuvoton
W79E8213AKG

W79E8213AKG - 8-bit 8051 MCU, 4KB Flash, 20MHz, 20-DIP | Nuvoton

The Nuvoton W79E8213AKG is an 8-bit 4T-8051 microcontroller with 4KB of in-system programmable Flash EPROM, executing one instruction per clock cycle at up to 20MHz and housed in a 20-pin PDIP (DIP-20) through-hole package. It provides 128 bytes of on-chip RAM, brown-out detection, and an integrated 4-channel 10-bit ADC, targeting cost-sensitive industrial and consumer control applications where a mature 8051 core simplifies firmware reuse. An 8-bit 8051 microcontroller is a small single-chip computer based on the original Intel MCS-51 architecture, combining an 8-bit CPU, program memory, data RAM, and peripherals on a single silicon die. The 8051 family is widely classified as an MCU (microcontroller unit) within the broader category of microcontrollers, embedded processors, and finally semiconductors. Nuvoton's W79 series extends the legacy 8051 footprint with modern process technology, larger Flash densities, and ICP (In-Circuit Programming) capability for field-reprogrammability without removing the part from the board. Key features include 4KB (4K x 8) Flash program memory that supports both hardware writer and ICP modes, 128 bytes of on-chip SRAM, an operating frequency up to 20MHz, internal watchdog timer and brown-out reset for robust field operation, and a 20-pin DIP form factor that fits legacy through-hole PCB designs. The device runs across the industrial -40C to +85C temperature range, supports standard 8051 peripherals (UART, timers, GPIO), and integrates an ADC for mixed-signal sensing. At the silicon level, the W79E8213 uses a 4T (four-clock-per-machine-cycle) 8051 core, providing single-cycle instruction execution that delivers up to four times the throughput of legacy 12T 8051 derivatives at the same clock rate. The mixed program/data Flash architecture is partitioned as 4KB code space at the base address, with hardware lock bits available to protect intellectual property against unauthorized readout. Power management includes idle and power-down modes that drop supply current to microampere levels for battery-backed installations. Typical applications include home appliance controls such as rice cookers and washing machines, white goods and HVAC blower control modules, battery chargers, LED lighting controllers, security keypads, and small-format industrial control boards. The DIP-20 package and 8051 instruction set also make the W79E8213AKG a drop-in upgrade for legacy 8051 designs that need more Flash without requiring PCB rework. When designing with the W79E8213AKG, provide a 0.1uF decoupling capacitor as close as possible to VDD and a bulk capacitor on the reset pin if external reset components are used. For ISP/ICP, three of the device's GPIO pins double as the programming interface and must not be permanently pulled to a logic level during the in-circuit programming sequence. Operating voltage is typically 5V with tolerance for 3V to 5.5V operation depending on frequency. This page synthesizes distributor stock levels, parametric alternatives, ICP programming notes, and 8051 architecture context that supplement the manufacturer datasheet and help engineers select the right drop-in replacement when the W79E8213AKG reaches end-of-life.

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