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W77L032A25FL - 25MHz ROMless 8051 MCU | Nuvoton
W77L032A25FL

W77L032A25FL - 25MHz ROMless 8051 MCU | Nuvoton

Nuvoton Technology Corporation W77L032A25FL is an 8-bit ROMless 8051-compatible microcontroller operating at up to 25 MHz, with 1K x 8 RAM, 36 I/O lines, and a 44-BQFP package. It operates from 2.7 V to 5.5 V and uses an internal oscillator. The W77L032 core is designed to complete 8051 instructions faster than a traditional 8051 operating at the same clock speed. An 8051-compatible microcontroller is an embedded processor that implements the widely used MCS-51 instruction set and associated peripheral architecture. Within the embedded-control hierarchy, it belongs to the 8-bit MCU family and provides a simple alternative to larger 16-bit or 32-bit controllers when control logic, serial communications, timers, and limited data processing are the primary requirements. A ROMless device requires an external program-memory interface. Key characteristics include a 25 MHz maximum operating frequency, 1K x 8 bytes of internal RAM, 36 general-purpose I/O pins, and a 2.7 V to 5.5 V supply range. The device is intended for surface-mount assembly in a 44-BQFP package. Its ROMless architecture makes it useful when the application requires external program storage, configuration flexibility, or a larger memory arrangement than an on-chip ROM device provides. The W77L032 core is designed to reduce wasted instruction cycles relative to a conventional 8051 implementation. According to the manufacturer documentation, typical instruction execution can be approximately 1.5 to 3 times faster than a traditional 8051 at the same crystal frequency, depending on the instruction type. This improvement can shorten control-loop execution time without changing the software's 8051 instruction-level compatibility. Typical uses include industrial control panels, compact automation equipment, appliance controllers, serial-interface equipment, and embedded products that already use 8051-compatible code or peripherals. Designers should also consider the external program-memory interface and required memory type when laying out the PCB. For industrial and automotive contexts, verify qualification and operating-temperature requirements before committing the device to a production design. A key implementation consideration is that the external clock, reset, memory, and decoupling connections must follow the pin-assignment and electrical requirements in the W77L032/W77L032A/W77M032A datasheet. Confirm the external memory interface, reset behavior, and I/O allocation in the final schematic rather than deriving them from the package outline alone. This product page consolidates the verified device identity, core specifications, package details, sourcing options, and practical design guidance. It also separates the ROMless W77L032A configuration from related flash-based W77M032A devices, helping engineers compare memory architecture, clock requirements, and PCB compatibility before selection.

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W77L032A25PL - 25MHz ROMless 8051 MCU | Nuvoton
W77L032A25PL

W77L032A25PL - 25MHz ROMless 8051 MCU | Nuvoton

Nuvoton Technology Corporation W77L032A25PL is a ROMless 8-bit 8051-compatible microcontroller rated up to 25 MHz, supplied in a 44-pin PLCC package. It operates from 2.7 V to 5.5 V and provides 1K x 8 bits of RAM, an 8-bit data bus, and up to 36 I/O positions according to the catalog information. Its ROMless architecture separates execution storage from the controller, allowing the external program-memory configuration to be selected for the target application. An 8051 microcontroller is an 8-bit embedded-control component that combines a CPU core, memory interfaces, timers, serial communication, and parallel I/O. Within the product hierarchy, the W77L032 belongs to the 8051-compatible microcontroller family, which sits above general-purpose microcontrollers and below the broader category of embedded processors and semiconductors. The principal benefits of this device are its 25 MHz maximum clock, broad 2.7 V to 5.5 V supply range, and generous I/O count for a small 8-bit controller. ROMless operation is particularly useful when code storage must remain external or when a common controller can support several memory configurations. The 44-pin PLCC package also provides a leaded form factor that can simplify inspection, assembly, and prototyping compared with a very small surface-mount package. The W77 architecture uses an 8-bit data bus and provides 1K x 8 bits of RAM. One catalog entry identifies an internal oscillator, while another listing describes the ROM type as flash despite the primary product descriptions identifying the device as ROMless. Engineers should therefore consult the manufacturer datasheet and memory-interface section when confirming the exact external-memory configuration, oscillator arrangement, and timing characteristics for a production design. Typical applications include industrial controllers, serial-interface equipment, data acquisition modules, embedded keypads, motor-control interfaces, and legacy 8051 peripheral controllers. The combination of 36 I/O positions and a 25 MHz clock allows the device to coordinate multiple discrete inputs and outputs while retaining the straightforward programming model associated with 8051-compatible controllers. Design planning should begin with the 44-pin PLCC footprint, external program-memory requirements, oscillator connections, reset behavior, and the allocated I/O functions. Validate every pin against the current manufacturer datasheet before layout release, particularly where firmware depends on external memory timing or specific peripheral multiplexing. This product page consolidates the available electrical, package, sourcing, and replacement information into an engineering-focused selection guide. It also highlights the verified drop-in family options, application guidance, comparison limits, and design checks needed to evaluate the W77L032A25PL for an embedded-control design.

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W77L058A25FL - 8-Bit 80C51 32KB Flash 25MHz MCU | Nuvoton
W77L058A25FL

W77L058A25FL - 8-Bit 80C51 32KB Flash 25MHz MCU | Nuvoton

The Nuvoton Technology Corporation W77L058A25FL is an 8-bit flash microcontroller built on a 4-cycle 8051 core, with 32 KB of on-chip flash memory, a 25 MHz maximum operating frequency and a 2.7 V to 5.5 V supply range, packaged in a 44-pin MQFP (10 x 10 mm) surface-mount package. It targets cost-sensitive, high-volume consumer and industrial control designs that need a small footprint, wide supply tolerance and legacy 8051 toolchain compatibility. An 8-bit microcontroller (MCU) is a self-contained computing element that integrates a CPU core, program memory, data memory and peripherals onto a single die. The classic 8051 core, also called an MCS-51 or C51, remains the most widely installed 8-bit architecture in the industry, and its 4-cycle pipeline (rather than the original 12-cycle design) roughly triples instruction throughput compared with an early 8051. As a member of the wider microcontroller -> embedded processor -> semiconductor hierarchy, this part targets cost-sensitive embedded control rather than signal processing or connectivity. Key features of the W77L058A25FL include 32 KB of flash program memory for in-circuit programmable firmware, a 25 MHz clock rating that delivers up to 25 million instruction cycles per second, and a 2.7 V to 5.5 V operating range that covers both 3.3 V and 5 V system rails. Because the core is an 8051 derivative, existing assembly routines and Keil C51, SDCC or IAR 8051 toolchains can be reused without architectural rework, protecting firmware investment. The 44-pin MQFP (10 x 10 mm) footprint balances I/O count against board area, giving designs four 8-bit ports plus dedicated reset, clock and programming pins in a compact square surface-mount package suitable for automated assembly. As an MCU, the device integrates flash, RAM and standard 8051 peripherals (timers, serial ports and interrupt controller) on one die, eliminating the need for external program memory. Typical applications include small appliance and kitchen equipment controllers, LED driver and dimming modules, household meter and energy-monitoring front panels, industrial sequence controllers, keyboard and panel interface hubs, and compact sensor-node controllers where a 25 MHz 8051 core is sufficient and a 32 KB firmware budget is adequate. When designing around the W77L058A25FL, verify the pin multiplexing of each port against the peripheral assignment required by your firmware, and keep the decoupling network short: a 0.1 uF ceramic plus a 4.7 uF bulk capacitor at VDD/VSS minimizes brownout risk during flash write cycles. The 44-pin square outline also demands careful lead-frame tooling, so confirm the recommended land pattern and reflow profile before committing to volume production. This page consolidates distributor availability, pin- and package-matched drop-in alternatives from the same 8051 family, and practical layout and toolchain notes that go beyond the manufacturer datasheet.

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W77L516A25PL - 25MHz 8-Bit 8051 MCU, 64KB Flash | Nuvoton
W77L516A25PL

W77L516A25PL - 25MHz 8-Bit 8051 MCU, 64KB Flash | Nuvoton

The Nuvoton Technology Corporation W77L516A25PL is an 8-bit 8051-compatible microcontroller operating at 25 MHz, with 64 KB of flash program memory, 1 KB of RAM, and 36 I/O lines in a 44-pin PLCC package. It combines the familiar 8052 instruction set with a redesigned processor core that executes instructions approximately 1.5 to 3 times faster than a traditional 8051 at the same clock frequency. The W77L516A25PL is designed for embedded-control applications requiring deterministic serial communication, timer resources, parallel I/O, and programmable flash storage. An 8-bit microcontroller is a compact processor intended to control embedded systems rather than execute a desktop operating system. Within the semiconductor hierarchy, the W77L516A25PL belongs to the 8051-compatible microcontroller class and retains the standard 8052 peripheral model, including four 8-bit I/O ports, three 16-bit timer/counters, a full-duplex serial port, and interrupt resources. Its instruction-set compatibility allows legacy 8051-oriented code and development practices to be retained during product modernization. The principal device characteristics include 64 KB of flash program memory, 1 KB of on-chip RAM, 36 I/O pins, and a 25 MHz operating frequency. Additional integrated resources identified for this device include a serial port, power-on reset, and a watchdog timer. The redesigned core removes wasted clock and memory cycles, so software timing can improve without changing the external clock speed. Flash memory also provides a more flexible program-storage medium than mask-programmed or one-time-programmable microcontroller implementations. The 44-pin PLCC package provides a leaded, socket-compatible format suited to controllers, interface modules, industrial control boards, and legacy system upgrades. Its pin-compatible 8052 heritage simplifies board-level continuity when a design moves from a conventional 8051-class controller to this faster implementation. Designers should still validate the clock configuration, peripheral allocation, reset behavior, and memory map in the target system rather than assuming every legacy peripheral behaves identically. Typical uses include industrial equipment interfaces, serial protocol bridges, data acquisition modules, appliance controllers, embedded instrumentation, and communication adapters. The combination of four parallel I/O ports, three timers, serial communications, and 36 I/O lines is especially useful for systems that must connect switches, sensors, displays, relays, and legacy peripherals while maintaining predictable control timing. The principal design consideration is preserving compatibility at both software and board level. Confirm that the chosen oscillator and reset circuit meet the datasheet requirements, allocate every pin according to the manufacturer's pin description, and include adequate decoupling. Because this is a legacy-compatible 8-bit architecture, migration planning should also include confirmation of compiler support, bootloader behavior, peripheral register mapping, and any source-code changes required for the faster core. This page combines the manufacturer's device data with practical selection guidance, application context, package information, and verified sourcing links. It is intended to help engineers determine whether the W77L516A25PL fits an existing embedded-control design and how to evaluate compatible W77-family options without overlooking memory, timing, package, or toolchain requirements.

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W77L532A25FL - 8-Bit 128KB Flash MCU | Nuvoton
W77L532A25FL

W77L532A25FL - 8-Bit 128KB Flash MCU | Nuvoton

The Nuvoton W77L532A25FL is an 8-bit embedded microcontroller with 128KB of Flash program memory, 36 I/O pins, and a 25 MHz maximum operating frequency. It is packaged in a 44-pin BQFP and includes an 8051 core, serial-port connectivity, a power-on reset peripheral, and a watchdog timer. The device is identified as an active part and is positioned for compact embedded-control designs that require nonvolatile firmware storage and a broad external bus interface. An 8-bit microcontroller is a semiconductor integrated circuit designed to execute embedded instructions using an 8-bit data path. The W77L532A25FL belongs to the 8051-compatible microcontroller hierarchy, combining a CPU core, Flash memory, RAM, serial communication, and dedicated system-control peripherals in one package. Its EBI/EMI interface permits connection to external memory or peripheral devices when the on-chip resources are insufficient. The principal feature set includes 128KB, or 128K × 8, of Flash program memory and 1K × 8 bytes of RAM. Its 36 available I/O lines support peripheral functions and general digital control. At up to 25 MHz, the MCU provides a defined operating speed for embedded tasks. Program-once development is supported by the Flash memory architecture, while power-on reset and watchdog-timer functions improve recovery after startup errors or unexpected program stalls. The W77L532A25FL is an 8-bit MCU rather than a high-performance 32-bit processor. Its architecture is appropriate for deterministic control tasks, data acquisition, communication bridging, keypad and display control, and compact industrial equipment. The 44-pin BQFP exposes substantially more I/O than a small lead-frame package, making external sensors, displays, relays, and memory devices easier to connect while still supporting surface-mount assembly. Typical applications include programmable control panels, instrumentation, serial-interface adapters, industrial controllers, and embedded peripheral modules. Its 36 I/O pins can distribute control signals across multiple external devices, while the EBI/EMI interface provides a route to additional bus-connected components. The serial port is useful for host communication, configuration transfer, firmware updates, or linking the controller to another embedded system. The main design consideration is power and clock planning. Engineers should use the manufacturer's oscillator and reset guidance when creating the clock network, preserve the required supply decoupling arrangement, and confirm that every signal connected to the 36 available I/O pins has a suitable input level. Firmware should also enable the watchdog timer in applications where a hung task could create unsafe equipment behavior. This product record combines the part's core embedded specifications, package information, sourcing structure, and engineering guidance in one concise reference. It supports initial design review by connecting the 8051 core, 128KB Flash memory, 1K × 8 RAM, 25 MHz speed, and 36 I/O capabilities with practical implementation considerations for reliable embedded systems.

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W78C032C40FL - 40MHz 8-Bit ROMless 8051 MCU | Nuvoton
W78C032C40FL

W78C032C40FL - 40MHz 8-Bit ROMless 8051 MCU | Nuvoton

Nuvoton Technology Corporation W78C032C40FL is an 8-bit W78-series 8051-compatible microcontroller with a 40 MHz maximum clock rating, ROMless program memory architecture, 5 V supply operation, and a 44-pin PQFP package. It is designed for embedded control systems that require a compact 8-bit CPU, external program storage, and a conventional parallel microcontroller interface. An 8051-compatible microcontroller is an embedded processing component that executes firmware from external program memory and controls peripherals through dedicated digital I/O and internal resources. The W78 family combines the widely established 8051 instruction set with an extended 8-bit architecture, positioning the device within the broader hierarchy of microcontrollers, embedded processors, and semiconductor control devices. The W78C032C40FL combines ROMless operation, 8-bit processing, a 40 MHz clock classification, and a 5 V operating supply. ROMless construction allows firmware capacity to be determined by an external program-memory device, making this configuration useful when applications require flexible code storage, in-system programming, or firmware separation. Its 44-pin package also provides a larger pin count than many compact 8-bit microcontrollers, supporting applications with more external signals. The architecture is listed as 8-bit 8051 CISC, allowing engineers to use the established W78 programming model and associated development tools. Because the MCU is ROMless, a complete board design must include suitable external program memory and the required bus interface. Clocking, reset, power, and signal conditioning should follow the detailed electrical and timing requirements in the manufacturer datasheet before schematic release. Typical uses include industrial control panels, sensor-conditioning controllers, communication interfaces, programmable logic controllers, appliance controllers, and compact embedded automation modules. The device is particularly relevant to legacy or cost-sensitive 8051 designs where retaining the W78 software ecosystem is more valuable than adopting a different instruction set or requiring a larger pin count. A key design consideration is firmware-memory integration. Confirm that the external memory address, data, and control lines can be routed without compromising timing, while preserving the required oscillator and reset behavior. Because available listing descriptions use inconsistent clock wording, the highest operating frequency and oscillator configuration should be verified against the manufacturer datasheet before the device is specified for timing-critical operation. This page consolidates the documented device identity, package information, sourcing guidance, and engineering considerations into a compact selection reference. It also distinguishes verified manufacturer information from unresolved details, helping engineers identify what must be confirmed before schematic, firmware, and PCB-layout commitments are finalized.

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W78C032C40PL - 40MHz ROMless 8051 MCU | Nuvoton
W78C032C40PL

W78C032C40PL - 40MHz ROMless 8051 MCU | Nuvoton

Nuvoton W78C032C40PL is an 8-bit W78 8051-compatible microcontroller operating up to 40 MHz with a 4.5 V to 5.5 V supply range. The device is ROMless, provides 256 x 8 bits of data RAM, and offers 32 general-purpose input/output pins in a 44-pin PLCC package. A microcontroller is a programmable semiconductor that combines a CPU core, memory, input/output ports, and peripheral functions on one integrated circuit. The W78 belongs to the 8051 microcomputer hierarchy, where a small instruction set and dedicated I/O ports provide a practical platform for embedded control. A ROMless configuration requires an external program-memory device, making the MCU suitable for systems where firmware storage is implemented separately from the controller. Principal characteristics include a maximum operating frequency of 40 MHz, an internal oscillator, 32 I/O pins, 256 bytes of data RAM, and a 4.5 V to 5.5 V operating supply range. Its 44-pin PLCC package provides a leaded, surface-mount form factor with J-leads. The Pb-free marking identifies the component as intended for lead-free manufacturing environments, although broader environmental and automotive qualifications should be confirmed separately. The 8-bit architecture is optimized for compact embedded-control logic rather than high-throughput computing. With 32 I/O pins, an external ROM interface, and 256 bytes of internal RAM, the W78C032C40PL can support digital monitoring, sequential logic, human-interface control, and simple peripheral-control functions. Designers should account for the limited RAM when sizing buffers and selecting between direct RAM variables, external data memory, and peripheral registers. Typical applications include industrial control panels, programmable logic controllers, instrumentation, appliance controllers, data-acquisition front ends, and embedded systems that already use the W78 or 8051 instruction set. The 40 MHz clock capability provides additional timing margin for interrupt-driven control loops, while the external program-memory architecture permits firmware capacity to scale independently from the MCU. A critical design consideration is that the controller requires external program memory because it is ROMless. The memory interface, address decoding, reset behavior, oscillator configuration, and bypass components should therefore be implemented according to the manufacturer datasheet. PLCC assembly also requires inspection for solder-joint formation, pin-1 orientation, and adequate board-level clearance around the J-leads. This product page consolidates the core electrical characteristics, replacement candidates, package information, and design considerations needed to evaluate the W78C032C40PL for an existing 8051-compatible embedded-control platform.

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W78C438C40FL - 40MHz 8-Bit ROMless MCU | Nuvoton | 100-QFP
W78C438C40FL

W78C438C40FL - 40MHz 8-Bit ROMless MCU | Nuvoton | 100-QFP

Nuvoton Technology Corporation W78C438C40FL is a 40 MHz, 8-bit, ROMless CMOS microcontroller with 40 I/O lines, a 100-QFP package, and a 4.5 V to 5.5 V supply range. Designed as a derivative of the W78C58 microcontroller family, it provides external program-memory addressing and substantial peripheral integration for embedded control systems. The W78C438C is functionally compatible with the W78C32 while extending its memory and I/O capabilities. An 8051-family microcontroller is an embedded-processing device built around a compact 8-bit CPU, program and data memory interfaces, timers, serial communication blocks, and general-purpose I/O. Within the product hierarchy, the W78C438C40FL is an 8-bit microcontroller, an embedded processor, and a system-on-chip platform designed for deterministic control tasks. Its ROMless architecture allows the application program to reside in external memory while the microcontroller executes code and manages peripheral activity. The device operates at up to 40 MHz and provides five general-purpose I/O ports totaling 40 I/O lines according to the manufacturer datasheet. It supports 256 bytes of 8-bit RAM and can use a 64 KB program-memory and 1 MB data-memory addressing arrangement, or memory-mapped chip-select logic. The 4.5 V to 5.5 V operating range supports conventional 5 V industrial and embedded equipment. An external oscillator provides clocking flexibility when the system requires a specific timing source. The W78C438C architecture extends the classic 8051 design with memory-mapped external interfaces and four external interrupts. Its 40 MHz operating capability allows more frequent interrupt servicing and peripheral transfers than lower-speed 8-bit implementations. Because program memory is external, board-level design must account carefully for address decoding, bus timing, access control, and the electrical characteristics of the selected memory devices. The 100-QFP package exposes substantially more interface signals than smaller 8-bit controller packages. Typical applications include industrial automation controllers, data-acquisition and I/O-expansion systems, embedded communication equipment, industrial instrumentation, legacy 8051 peripheral controllers, and custom control platforms requiring external program storage. Its five ports make it useful where numerous digital lines must connect to sensors, relays, displays, memory devices, and bus transceivers. A functional-compatible 8051 software base can also simplify migration from established controller designs. For a new board, verify external memory address decoding and interrupt-priority assignments before committing the layout. Keep high-current bus and output-driver traces separate where practical, provide local bypass capacitance at the supply pins, and confirm all external signals against the pin-description table in the manufacturer datasheet. The W78C438C40FL is also identified as an active lifecycle part, making it appropriate for both new designs and maintenance of existing 8051-based platforms. This page consolidates the core electrical, memory, package, and lifecycle characteristics of the W78C438C40FL with practical implementation guidance, application fit, comparison fields, and design checks. It focuses on decisions engineers must make when integrating a ROMless, high-speed 8-bit microcontroller into an external-memory architecture.

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W78E051C40PL - 8-bit 8051 MCU, 4KB Flash, 40MHz, 44-PLCC | Nuvoton
W78E051C40PL

W78E051C40PL - 8-bit 8051 MCU, 4KB Flash, 40MHz, 44-PLCC | Nuvoton

The Nuvoton/Winbond W78E051C40PL is an 8-bit 8051-compatible microcontroller operating up to 40 MHz, integrating 4 KB of in-system programmable Flash EPROM and 128 bytes of on-chip RAM in a 44-pin PLCC package. According to the manufacturer datasheet (publication release November 10, 2006, Revision A4), the W78E051C40PL exposes four 8-bit bi-directional bit-addressable I/O ports (P0-P3) plus an additional 4-bit P4 port, two 16-bit timer/counters, a full-duplex UART, and an enhanced 6-source/2-level interrupt controller. The "40" suffix denotes the 40 MHz top clock, while the "PL" package code designates the 44-lead Plastic Leaded Chip Carrier (JEDEC MS-018). Programming is supported via standard 8051 tools because the instruction set is binary-compatible with the industry-standard MCS-51 core. An 8051 microcontroller (technically an MCS-51 family MCU) is an 8-bit Harvard-architecture CISC microcomputer originally introduced by Intel in 1980; despite its age the family remains popular in cost-sensitive, deterministic, deeply embedded applications because of its tiny footprint, predictable interrupt latency, and unparalleled third-party tool support. As a Flash EPROM variant the W78E051C family sits at the highest tier of the classic 8051 hierarchy: mask-ROM < OTP EPROM < Flash EPROM, with Flash enabling ISP and field-upgradeable firmware. In the broader taxonomy, an MCU is a programmable subset of a microprocessor and, more generally, a digital integrated circuit under power management and embedded-computing classifications. Key features include 4 KB Flash program memory, 128 bytes internal RAM, 36 general-purpose digital I/O lines, two 16-bit timers/counters, one UART with framing-error detection, six interrupt sources with two priority levels, on-chip oscillator with external crystal, power-saving Idle and Power-Down modes, and an in-system programming (ISP) interface through the serial port. According to the datasheet the device supports a wide operating frequency range, allowing software to reduce clock speed dynamically for power-sensitive applications. Architecturally, the W78E051C uses a 12-clock-per-machine-cycle core (the classic 8051 convention) with separate 64 KB program and 64 KB external-data address spaces, plus a 256-byte internal RAM space split between register banks, bit-addressable area, and user RAM. The Flash memory subsystem provides on-chip page-erase and byte-program capability, supporting in-application firmware updates via the UART bootloader on PLCC-package variants. Typical applications include industrial control subsystems, home appliance mainboards, keyboard/mouse scanners, sensor signal conditioning, low-cost USB bridges, LED display drivers, and legacy 8051 firmware upgrades. The wide frequency range and low-power Idle/Power-Down modes make it suitable for both mains-powered controllers and battery-backed utilities. Design-wise, ensure the EA/VPP pin is tied to VCC for internal-Fetch operation, or driven to +12 V only during parallel programming. Decouple VCC and AVCC (if present) with 0.1 microfarad ceramic capacitors placed within 5 mm of the pins to suppress switching noise during oscillator start-up and ISP writes. This page synthesizes distributor pricing, cross-reference drop-in alternatives (Nuvoton W78E052 and W78E058 variants) and practical PCB layout notes not consolidated in the manufacturer datasheet.

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W78E051DDG - 8-Bit 40MHz 4KB Flash MCU | Nuvoton
W78E051DDG

W78E051DDG - 8-Bit 40MHz 4KB Flash MCU | Nuvoton

Nuvoton Technology Corporation W78E051DDG is an 8-bit 8052-compatible W78 microcontroller with 4KB of Flash program memory and a maximum clock frequency of 40MHz. It operates from 2.4V to 5.5V and is supplied in a 40-pin DIP package. The verified distributor data identifies the device as Pb-free and specifies an operating temperature range of -40°C to +70°C. An 8-bit microcontroller is a compact embedded-control device integrating a CPU, program memory, data memory, and peripherals on one semiconductor package. Within the product hierarchy, W78E051DDG belongs to the embedded microcontroller class and is positioned for cost-sensitive control systems that require an 8-bit processing engine, Flash memory, and a conventional through-hole package. The 8052-compatible architecture also supports established embedded software and instruction-set familiarity. The primary features available from the verified data are 4KB of Flash program memory, operation up to 40MHz, a 2.4V to 5.5V supply range, and Pb-free construction. These attributes make the device applicable to industrial controllers, embedded automation equipment, motor-control systems, metering equipment, and connected low-power board designs. Its 40-DIP format also supports prototype construction and through-hole assembly. Technically, the W78E051DDG combines an 8-bit processor core with on-chip Flash rather than relying solely on an external program-memory device. A 40MHz operating rate provides additional timing headroom for peripheral servicing and control-loop execution, while the 2.4V minimum supply voltage supports integration into systems designed around low-voltage logic. Detailed RAM, timer, UART, GPIO, oscillator, and electrical-current information is not present in the supplied source data and should be confirmed in the manufacturer datasheet. Typical applications include simple motor controllers, industrial sequence-control boards, appliance-control modules, instrumentation interfaces, metering equipment, and compact embedded automation nodes. The through-hole 40-DIP package is particularly useful where production volumes are modest, prototype interchangeability is important, or automated through-hole assembly is already available. Firmware developers should use the manufacturer’s register definitions, memory map, and peripheral documentation when creating new designs. Design planning should begin with confirming the exact pinout, oscillator requirements, reset behavior, available peripheral functions, and memory map from the W78E051 family documentation. The 2.4V to 5.5V operating range does not establish the permissible voltage on every I/O pin, so signal-level compatibility must be verified separately. Decoupling and grounding should follow the datasheet reference layout rather than relying only on general 8052 conventions. This page consolidates verified distributor specifications, procurement links, application guidance, and explicit data gaps for the W78E051DDG. It distinguishes confirmed 8-bit, 40MHz, 4KB Flash, voltage, temperature, and package attributes from unreported specifications, helping engineers make an evidence-based procurement and design decision without filling unknown values with assumptions.

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W78E051DFG - 40MHz 8052 8-Bit MCU with 4KB Flash | Nuvoton
W78E051DFG

W78E051DFG - 40MHz 8052 8-Bit MCU with 4KB Flash | Nuvoton

Nuvoton Technology Corporation W78E051DFG is an 8-bit 8052-compatible microcontroller operating up to 40 MHz, with 4 KB of flash program memory and 36 general-purpose I/O pins in a 44-pin QFP package. Its stated operating supply range is 2.4 V to 5.5 V, making it suitable for embedded control systems operating from a regulated 5 V rail or other compatible source. An 8052 microcontroller is an embedded microcontroller architecture combining a small general-purpose CPU core with program memory, data memory, parallel I/O, serial communication, timers, and system-control peripherals. The W78E051 series belongs to the broader microcontroller category, which sits above processor cores and below embedded-control semiconductor solutions used in industrial products, appliances, access controls, and compact automation equipment. The W78E051DFG provides 4 KB (4K x 8) of flash program memory for firmware storage and an operating speed of 40 MHz. Its listed peripherals include a power-on reset, watchdog timer, UART/USART interface, and external bus interface. The 36 available I/O pins provide substantial parallel connectivity for discrete inputs, output control, indicators, relays, and external interface signals without requiring a larger package. The device operates from 2.4 V to 5.5 V and is specified for industrial temperature conditions from -40 °C to 70 °C. Flash memory allows firmware to remain resident without a separate external memory component, simplifying both PCB routing and production programming. The 40 MHz clock rate also gives the 8-bit CPU more instruction throughput than lower-frequency 8051-class devices while retaining the familiar programming model. Typical uses include appliance controllers, keyboard and human-interface panels, access-control equipment, small motor or relay controllers, industrial interface modules, and compact embedded products. Its combination of 36 I/O pins, serial communication, external bus support, and watchdog protection is particularly useful when a design needs flexible parallel connectivity without a high-pin-count microcontroller package. When designing around the W78E051DFG, verify every peripheral, clock option, interrupt vector, and electrical limit against the current manufacturer datasheet before schematic release. The supplied search evidence confirms the principal specifications but does not expose the complete pin map, memory map, timing diagrams, or electrical characteristics needed for a production design. This page consolidates the verified distributor information, core MCU specifications, sourcing links, and design limitations for the W78E051DFG. It also separates confirmed facts from unavailable engineering data, helping engineers establish whether the 44-pin 8052-compatible device is appropriate before beginning a drop-in PCB or firmware evaluation.

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W78E051DLG - 8-Bit 40MHz 4KB Flash 8051 MCU | Nuvoton
W78E051DLG

W78E051DLG - 8-Bit 40MHz 4KB Flash 8051 MCU | Nuvoton

The Nuvoton Technology Corporation W78E051DLG is an 8-bit 8052-compatible W78 series microcontroller with a 40 MHz operating frequency, 4 KB of programmable flash memory organized as 4K x 8, and a 48-pin LQFP package. It operates from a 2.4 V to 5.5 V supply, supporting both 5 V and 3.3 V embedded systems. A microcontroller, or MCU, is a semiconductor that integrates a CPU core, flash program memory, data memory, and peripherals into one device. Within the embedded-control hierarchy, the W78E051DLG belongs to the 8-bit 8051/8052 MCU family rather than a 16-bit or 32-bit microcontroller. Its role is to execute embedded firmware, monitor digital inputs, drive outputs, and communicate with sensors, actuators, human-interface devices, and industrial peripherals. The key specifications of this device are a 40 MHz clock, 4 KB flash for firmware storage, and a 2.4 V to 5.5 V operating range. Verified distributor listings describe the part as an 8052 W78 microcontroller with 4K x 8 flash and Pb-free construction. The 48-pin LQFP-48 package measures 7 mm by 7 mm and provides a practical pin count for external interfacing, clocking, reset, programming, and mixed-signal control applications. The 8052-compatible architecture is appropriate for cost-sensitive embedded designs that rely on established compiler, debugger, and programming-tool ecosystems. At 40 MHz, the processor offers considerably more instruction throughput than legacy 8-bit systems operating near 12 MHz or 24 MHz. The available verified data does not state the RAM capacity, peripheral set, oscillator options, ADC performance, or timer configuration, so those parameters should be confirmed in the manufacturer datasheet before final schematic or firmware design. Typical uses for the W78E051DLG include compact industrial controllers, appliance control boards, data-acquisition modules, LED and display systems, and 8-bit sensor-hub designs. The 36 I/O indicated in one distributor listing provides a practical basis for digital control, while the 4 KB flash limit makes the device best suited to firmware with modest code size. Applications requiring substantial buffer storage, high-resolution analog conversion, or large protocol stacks should verify those requirements before committing to the part. Design planning should begin by confirming the complete pin assignment, peripheral multiplexing, and programming interface in the manufacturer datasheet. The LQFP-48 footprint also requires deliberate decoupling, clock-routing, and reset-layout planning to avoid analog-noise coupling and startup problems. Because the verified listings provide only a partial specification set, procurement decisions should not rely on distributor summaries alone. This page consolidates distributor pricing, availability, package information, and verified electrical attributes while separating confirmed data from unconfirmed parameters. It also provides a same-family drop-in comparison framework and practical design notes that are not present in a standard distributor catalog entry.

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W78E051DPG - 8-Bit 40MHz 4KB Flash MCU | Nuvoton
W78E051DPG

W78E051DPG - 8-Bit 40MHz 4KB Flash MCU | Nuvoton

Nuvoton Technology Corporation W78E051DPG is an 8-bit 8052-compatible microcontroller operating up to 40 MHz, with 4 KB of Flash program memory, 256 bytes of RAM, and 36 programmable I/O pins in a 44-LCC J-lead package. Its verified supply-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 70 °C. An 8-bit microcontroller is a compact embedded-control device whose processor, program memory, data memory, and peripherals are integrated on one semiconductor package. Within the broader hierarchy of microcontroller, embedded processor, and semiconductor, the W78 series combines an 8052-class architecture with deterministic I/O for cost-sensitive control systems. The W78E051DPG is intended for compact embedded controllers rather than high-compute systems where external memory, extensive connectivity, or large application code are required. Key characteristics include a maximum clock frequency of 40 MHz, 4 KB or 4K × 8 bits of Flash memory, 256 bytes of RAM, and 36 programmable pins. Integrated power-on reset and watchdog-timer functions are identified in the verified product listing. These resources support small control loops, digital I/O expansion, status monitoring, and basic sequencing without requiring a separate external nonvolatile-memory device for firmware storage. The device uses an 8052-compatible core and belongs to Nuvoton's W78 microcontroller family. Its 40 MHz operating capability provides substantially more instruction throughput than legacy 12 MHz 8051-class designs, while the compact 4 KB Flash budget keeps firmware architecture focused. The 36 programmable I/O pins offer a broad interface count for switches, indicators, relays, sensors, and external control logic when the board-level pin multiplexing and electrical limits are respected. Typical embedded uses include industrial control modules, appliance controllers, building equipment, small sensor nodes, and compact peripheral controllers. The 44-LCC J-lead package supports through-hole assembly and is useful when a product requires a mechanically robust package or inspection-friendly leads. The 2.4 V to 5.5 V operating range also permits integration with common low-voltage control systems, provided every connected peripheral shares a compatible logic level. The principal design trade-off is the limited 4 KB Flash and 256-byte RAM capacity. Firmware must be compact, stack depth must be checked carefully, and boundary-heavy algorithms may require a larger microcontroller. Exact pin multiplexing, peripheral behavior, reset timing, clock configuration, and absolute maximum ratings must be confirmed against the manufacturer datasheet before schematic release. This page consolidates verified distributor specifications, sourced operating limits, package information, application guidance, and procurement references. It also clearly separates verified facts from parameters that require confirmation, avoiding unsupported claims while providing a concise engineering starting point for the Nuvoton W78E051DPG.

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W78E052DDG - 40MHz 8-bit 8051 MCU | Nuvoton
W78E052DDG

W78E052DDG - 40MHz 8-bit 8051 MCU | Nuvoton

The Nuvoton Technology Corporation W78E052DDG is an 8-bit 8051-compatible CISC microcontroller operating up to 40 MHz, with 8 KB of flash program memory, 256 bytes of RAM, 36 I/O pins, and a 40-pin DIP package. It operates across the verified 2.4 V to 5.5 V supply range and supports temperature grades identified as -40°C to 70°C by Mouser and -40°C to 85°C for the W78E052D family by Nuvoton. The product is listed as Not Recommended for New Designs. An 8051-compatible microcontroller is an embedded controller that executes instruction sets designed around the established 8051 architecture while extending it with modern flash memory and configurable peripheral resources. Within the product hierarchy, this device is a microcontroller, an embedded processing IC, and ultimately a semiconductor. Nuvoton describes the W78E052D family as a 6T/12T architecture configurable for compatibility with traditional 12T 8051 designs. Verified distinguishing features include an operating frequency of up to 40 MHz, 8 KB of 8K × 8 flash program memory, 256 × 8 RAM, and 36 general-purpose I/O lines. The 40-DIP package supports through-hole PCB assembly and is convenient for prototypes, legacy industrial controls, alarm systems, bar-code readers, KVM equipment, key phones, user interfaces, and IPC products. A single full-duplex UART is also identified for serial communications. The W78E052D family combines a 6T/12T selectable machine cycle with flash memory and a broad supply range. Faster 6T operation can reduce instruction-cycle timing compared with traditional 12T execution, while 12T compatibility helps preserve behavior expected by established 8051 designs. Designers must still verify oscillator, reset, timing, peripheral, and software assumptions against the manufacturer documentation before replacing an existing design. A through-hole DIP-40 MCU is most appropriate where manual assembly, socketed prototypes, repairability, or stable industrial availability matter more than minimum PCB area. The DIP package exposes 36 I/O pins alongside control and power functions, allowing substantial parallel digital connectivity but requiring careful planning for board height and connector clearance. The primary engineering trade-off is lifecycle status: Nuvoton marks the W78E052D family Not Recommended for New Designs. Existing supported programs may continue using available stock, but new designs should first evaluate the W78E054D or another currently recommended MCU and perform a complete software, electrical, and package migration review. This page consolidates distributor pricing, lifecycle information, application context, verified specifications, and drop-in assessment data that are distributed across manufacturer and distributor pages. Engineering decisions should remain anchored to the manufacturer datasheet rather than distributor summaries alone.

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W78E052DFG - 8-Bit 8051 8KB MCU | Nuvoton | Embedded Control
W78E052DFG

W78E052DFG - 8-Bit 8051 8KB MCU | Nuvoton | Embedded Control

The Nuvoton Technology Corporation W78E052DFG is an 8-bit 8051-compatible microcontroller with 8KB of Flash program memory, a 2.4V to 5.5V operating-voltage range, and support for frequencies up to 40MHz according to the supplied product references. It is offered in a 44-pin QFP package. The device belongs to the W78E052D family of configurable 6T/12T 8051 microcontrollers and is intended for embedded control applications involving security and alarm systems, barcode readers, KVM equipment, telephones, user interfaces, and industrial control products. An 8051 microcontroller is an embedded processing IC that combines a compact 8-bit CPU, program memory, data memory, and peripherals on one device. In the product hierarchy, the W78E052DFG is a microcontroller, which is a type of embedded processor and system-on-chip used in power management, industrial automation, access control, human-interface, and communications equipment. Its traditional 8051 architecture can support established toolchains and software while the W78E052D family adds configurable 6T or 12T operation. The principal documented features include 8KB of Flash memory, operation from 2.4V through 5.5V, and compatibility with traditional 12T 8051 devices. A Globalspec listing identifies the device as an 8-bit, 40MHz MCU with 8KB of Flash. Manufacturer information describes the W78E052D as configurable for 6T or 12T operation, making it suitable for designs that require a familiar 8051 software model across multiple package and frequency configurations. The W78E052DFG is specifically identified for a 44-pin QFP package. This surface-mount package supports compact PCB construction without requiring a through-hole socket. The supplied Nuvoton Direct result lists LQFP48, PLCC44, PQFP44, TQFP44, and DIP40 as package options within the broader W78E052D family; the exact package ordering code must therefore be checked against the package drawing when replacing or redesigning a board. Typical application areas include security and alarm panels, barcode-reader controllers, keyboard-video-mouse or KVM interfaces, key telephones, compact user-interface modules, and industrial control equipment. For these systems, the important selection criteria are the 8KB code-memory capacity, 2.4V to 5.5V supply range, 8-bit processing capability, and availability of the required package and peripheral configuration. Designers should confirm the full clock, memory, peripheral, and electrical limits in the manufacturer datasheet before release. Because the family description gives broad package and temperature information, the exact ordering code must be used to confirm the device variant. The Mouser listing also specifies a Pb-free finish and a -40°C to 70°C range, while the Nuvoton product information gives a -40°C to 85°C family range, so variant-specific qualification data should control. This page consolidates the verified manufacturer description, distributor specifications, pricing reference, lifecycle status, and package information for W78E052DFG. It also distinguishes documented facts from unavailable details, providing engineers with a concise basis for initial design review while clearly identifying the datasheet and authorized distributor sources needed for final qualification.

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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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W78E054DDG - 8-Bit 40MHz 16KB Flash MCU | Nuvoton
W78E054DDG

W78E054DDG - 8-Bit 40MHz 16KB Flash MCU | Nuvoton

Nuvoton W78E054DDG is an 8-bit 8052-compatible microcontroller rated up to 40 MHz, with 16 KB of Flash program memory and operating from 2.4 V to 5.5 V. The device is supplied in an LQFP-48 package and is positioned for embedded security, alarm, barcode-reader, KVM, key-phone, user-interface, and industrial-control systems. Its 32 I/O pins provide a practical interface count for digital control and communication designs. An 8-bit microcontroller is a compact embedded-processing IC built around an 8-bit CPU, program memory, data memory, timers, serial interfaces, and digital I/O. The W78E054D belongs to the broader 8051/8052 microcontroller family and combines legacy peripheral compatibility with a wider operating-frequency range. Its selectable 6T or 12T architecture is designed to support traditional 12T 8051-compatible hardware while accommodating higher clock rates. Principal device characteristics include a 40 MHz maximum operating frequency, 16 KB of Flash program memory, 32 I/O pins, a 2.4 V to 5.5 V supply range, and an external oscillator configuration. Flash memory retains programmed firmware without a removable programmer, while the broad supply-voltage range supports both 3.3 V and 5 V equipment when the associated peripheral and I/O limits are respected. The W78E054D uses the 8052 processor architecture and provides a conventional register-based embedded-control platform. Nuvoton describes the family as configurable and pin-compatible with traditional 12T 8051 implementations. That compatibility makes migration from an appropriately designed 8051 system possible, although firmware, timing, oscillator, and peripheral behavior should still be verified before production use. Typical applications include electronic access controls, alarm panels, barcode readers, keyboard-video-mouse equipment, key-phone systems, industrial human-interface panels, and embedded industrial controllers. The 32 available I/O pins are especially useful when a design must combine sensing inputs, relay or actuator outputs, display interfaces, and serial communication without using a larger package. The principal engineering consideration is that this device has an external oscillator rather than a listed internal oscillator. The clock source, capacitance, startup behavior, and all timing-dependent firmware must therefore be designed for the external clock configuration. Designers should also confirm the exact LQFP-48 pin mapping and the latest Nuvoton datasheet before committing a new PCB. This product page combines verified distributor pricing, lifecycle information, package characteristics, and application guidance with explicit identification of the remaining pinout and supply-chain details. It also distinguishes confirmed drop-in replacements from related family members that were not verified as exact replacements, helping engineers avoid assumptions based only on similar part numbers.

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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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W78E054DLG - 40MHz 8052 8-Bit 16KB MCU | Nuvoton | LQFP-48
W78E054DLG

W78E054DLG - 40MHz 8052 8-Bit 16KB MCU | Nuvoton | LQFP-48

Nuvoton Technology Corporation W78E054DLG is an 8-bit 8052-compatible microcontroller operating up to 40 MHz, with 16 KB of flash memory and a 48-pin LQFP package. The verified listing specifies a 2.4 V to 5.5 V operating range, a -40 °C to 70 °C temperature range, Pb-free construction, and an 8052 instruction set. These characteristics place the W78E054DLG in the broader 8-bit embedded-control MCU category, where on-chip flash, digital I/O, timing resources, and serial peripherals are combined for compact control designs. An 8-bit microcontroller is a microprocessor core designed primarily for embedded control rather than desktop computing. The W78E054D/W78E052D family extends the 8052 architecture to higher operating frequencies and provides integrated program memory for standalone applications. At up to 40 MHz, the device is suitable for systems requiring fast deterministic I/O handling while remaining manageable in an 8-bit software ecosystem. Its 48-LQFP package exposes substantially more I/O than smaller packages while remaining compatible with automated PCB assembly. The verified features emphasize a 16 KB flash program-memory capacity, 40 MHz maximum clock operation, and a broad 2.4 V to 5.5 V supply range. The 2.4 V minimum operating voltage supports low-voltage designs, while the upper limit allows operation from conventional 5 V systems. The stated -40 °C to 70 °C commercial temperature range supports industrial equipment, instrumentation, appliances, access controls, and compact controller modules that do not require the wider temperature limits associated with extended-temperature components. As an 8052-compatible device, the W78E054DLG can execute standard 8051-family instructions while benefiting from the faster clock and denser flash implementation in this family. The verified data identifies the device as a 16K × 8 flash MCU, providing 16,384 bytes of program storage. Detailed RAM organization, interrupt-vector arrangement, peripheral configuration, oscillator requirements, and electrical timing values are not included in the supplied excerpts and should be confirmed against the manufacturer datasheet before schematic or firmware release. Typical application areas include small industrial controllers, sensor-conditioning and data-acquisition modules, motor and relay control, security and access-control equipment, and consumer appliances. Its 48-LQFP footprint is particularly useful when a design needs more external connections than a small-outline microcontroller can provide. In each case, firmware must account for the device's 8-bit architecture and peripheral assignment shown in the authoritative pinout and reference manual. A critical design step is to verify every power, clock, reset, and I/O connection against the official W78E054D/W78E052D datasheet before PCB layout. The supplied search excerpts do not expose the complete pin names, exposed-pad arrangement, decoupling requirements, or recommended external components. Engineers should also confirm the oscillator source, programming interface, reset strategy, unused-pin treatment, and operating voltage tolerance for the assembled production configuration. This product record consolidates verified distributor pricing, package information, operating limits, and sourcing links into one engineering reference. It also separates confirmed parameters from missing datasheet details, helping designers avoid assumptions about pin compatibility, replacement parts, memory availability, or peripheral behavior while preserving traceability to current market data.

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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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