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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

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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W78L032A24PL

W78L032A24PL - 8-Bit ROMless 24MHz Microcontroller | Nuvoton

The Nuvoton W78L032A24PL is an 8-bit ROMless W78-series microcontroller operating at 24 MHz, with 256 x 8 RAM, 32 I/O pins, and a 44-pin PLCC package. The device is designed for embedded control applications that require external program memory, parallel digital interfaces, timers, serial communication, and interrupt-driven control. Its architecture is based on the 80C32/W78 family and supports four 8-bit bidirectional parallel ports, three 16-bit timer/counters, a serial port, and a six-source, two-level interrupt structure. The W78L032A24PL is a ROMless microcontroller, meaning application firmware must be stored in external memory. This architecture can be useful in low-cost systems, industrial controllers, appliances, instrumentation, and legacy-compatible embedded platforms where a dedicated external ROM or Flash memory is acceptable. The 24 MHz operating speed supports more responsive control loops than slower 8-bit designs, while the 256-byte internal RAM provides working memory for variables, stack operations, and peripheral data handling. The 32 available I/O lines make the device suitable for products that require multiple digital inputs and outputs, such as keypads, indicators, relays, displays, sensors, and communication transceivers. The 44-pin PLCC package provides a leaded surface-mount format with a defined J-lead footprint and adequate board spacing for inspection and rework. The package designation indicates the PLCC configuration, while the exact pin assignment and electrical limits should be confirmed against the manufacturer datasheet before layout or firmware development. The internal peripheral set includes three 16-bit timer/counters, which can support timing, counting, pulse measurement, and periodic service functions. A serial port adds a basic serial communication resource, and the two-level, six-source interrupt capability allows multiple internal events to be prioritized. These resources make the W78L032A24PL appropriate for embedded control logic that is more parallel and timer-oriented than a minimal modern 8-bit MCU. Because the W78L032A24PL is ROMless, the system designer must provide external program memory and ensure that the memory interface, address decoding, timing, and reset behavior are correctly implemented. Firmware development also depends on the supported toolchain and device-specific interrupt and peripheral definitions. Use the manufacturer datasheet for the complete pin description, electrical characteristics, external-memory requirements, timing diagrams, and recommended application circuit. This page combines the verified device identity and electrical highlights with practical replacement and design guidance. It focuses on the W78L032A24PL as a 44-pin, 24 MHz, ROMless 8-bit microcontroller rather than a generic 8-bit controller, allowing engineers to compare packaging, memory architecture, peripheral availability, and sourcing constraints before committing to a PCB design.

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W78L365A24DL

W78L365A24DL - 24MHz 8052 64KB Flash MCU | Nuvoton

Nuvoton Technology Corporation W78L365A24DL is an 8-bit 8052-compatible microcontroller operating up to 24 MHz, with 64 KB of flash program memory, a 4 KB boot block, and 1.25 KB of RAM in a 40-DIP package. Its operating-voltage range is 2.4 V to 4.5 V, and it provides 32 general-purpose I/O pins for embedded control applications. An 8-bit microcontroller is a compact digital controller that executes programmed instructions from nonvolatile flash memory and transfers intermediate data into static RAM. Within the product hierarchy, this device is an embedded MCU, an 8-bit microprocessor, and a member of the 8051/8052-compatible microcontroller family. Its combination of flash memory, parallel I/O, and a 40-pin through-hole package suits legacy-compatible controller boards, industrial equipment, and educational platforms. The W78L365A24DL offers 64 KB (64K x 8) of flash program memory, including a 4 KB boot block identified in the product specifications. It also includes 1,024 bytes of general RAM plus a 256-byte RAM area, giving a combined listed RAM capacity of 1.25 KB. The 32 I/O pins provide a practical interface count for digital inputs, outputs, control signals, and external peripherals without requiring a high-pin-count surface-mount package. Operation is specified at up to 24 MHz across a 2.4 V to 4.5 V supply range. These figures make the MCU appropriate for compact embedded systems that use a 3.3 V rail and require more computational headroom than a conventional 8051-class controller operating at lower clock rates. The 40-DIP mechanical format also simplifies prototype construction, socketed assemblies, and manual rework compared with fine-pitch packages. Typical uses include industrial control modules, data-acquisition equipment, appliance controllers, instrumentation, communication modules, and educational embedded-system platforms. The 32 available I/O pins are particularly useful for systems combining switches, indicator outputs, relays, displays, and serial-interface peripherals. The 64 KB flash area can accommodate a larger firmware image than smaller legacy controllers while retaining compatibility-oriented hardware organization. When laying out a board, preserve the 40-DIP footprint and verify every signal assignment against the manufacturer pin-description table. Provide a stable supply within 2.4 V to 4.5 V, and choose oscillator, reset, and decoupling components using the circuit requirements in the manufacturer documentation. Because this is a through-hole microcontroller, pay particular attention to socket orientation, pin-1 identification, and adequate clearance around adjacent components. This page combines the core electrical, memory, packaging, and I/O characteristics with application guidance, sourcing questions, and drop-in replacement criteria. It also separates verified device facts from engineering checks that require the complete manufacturer pinout and circuit documentation before PCB release.

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W78L365A24FL

W78L365A24FL - 24MHz 8-Bit 64KB MCU | Nuvoton | 44-LQFP

The Nuvoton Technology Corporation W78L365A24FL is an 8-bit 8052-compatible microcontroller with a 24 MHz operating speed, 64 KB of flash program memory, 1.25 KB of RAM, and 36 I/O pins in a 44-pin BQFP package. It operates from 2.4 V to 4.5 V and includes a dedicated 4 KB boot block for firmware updating. An 8-bit microcontroller is a programmable control IC that executes firmware from embedded program memory and reads inputs from sensors, switches, communication interfaces, and human-interface circuits. The W78L365A24FL belongs to the W78 family and uses a standard 8052-compatible instruction set, placing it within the hierarchy of 8-bit MCU, embedded controller, integrated circuit, and semiconductor. Key features include 64 KB of in-system programmable flash for firmware storage, a 4 KB boot block for application loading, 1,024 bytes of general-purpose RAM plus 256 bytes of additional RAM, 36 I/O pins, and a maximum clock frequency of 24 MHz. The 2.4 V to 4.5 V operating range supports low-voltage embedded systems, while the Pb-free package designation identifies lead-free assembly. The W78L365A family architecture separates the main 64 KB program area from the auxiliary 4 KB boot area. A loader program can use the boot block to update the main program memory, making the device suitable for products requiring field firmware upgrades. Its 8052-compatible instruction set supports established 8051/8052 development methods, while the additional RAM and I/O capacity provide more working space than basic entry-level 8051 devices. Typical applications include industrial control panels, appliance controllers, building equipment, data-collection terminals, communication modules, and compact embedded products. The combination of 36 I/O pins, a 24 MHz clock, and bootloader-supported flash is useful when a controller must combine multiple digital interfaces with in-system firmware maintenance. When designing around the W78L365A24FL, confirm that the 44-BQFP land pattern and exposed programming interface match the PCB design. Follow the manufacturer datasheet for oscillator, reset, memory programming, decoupling, and pin-assignment requirements; the 2.4 V minimum operating voltage must also be respected throughout power-up and brownout conditions. This product page combines core device specifications, verified package information, bootloader considerations, practical application guidance, and same-family replacement analysis. It is designed to help engineers evaluate firmware compatibility, PCB footprint reuse, operating-voltage constraints, and upgrade requirements before selecting the W78L365A24FL for an embedded design.

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W78L365A24PL

W78L365A24PL - 8-Bit 24MHz 64KB MCU | Nuvoton | PLCC-44

Nuvoton Technology Corporation W78L365A24PL is an 8-bit W78 8052-compatible microcontroller with a 24 MHz operating frequency, 64 KB of flash program memory, and a 44-pin PLCC package. It provides 36 I/O pins and 1.25K x 8 bits of RAM, making it suitable for embedded control systems requiring substantial flash storage, moderate I/O density, and a compact leaded-chip carrier footprint. A microcontroller is a programmable integrated circuit that combines a CPU core, memory, timers, serial interfaces, and I/O ports on one device. The W78 family belongs to the broader 8-bit embedded-controller hierarchy, where an instruction-compatible architecture can support legacy 8052 designs while flash memory simplifies firmware updating. The W78L365A24PL is intended for appliances, industrial controllers, instrumentation, and other systems that need deterministic embedded control rather than application-processing performance. The principal device parameters are a 24 MHz clock, 64 KB of flash program memory, 1.25K x 8 bits of RAM, and 36 I/O lines. The suffix identifies the 24 MHz configuration, while the PL package designation identifies the leaded PLCC implementation. Program storage supports firmware of up to 64K x 8 bits, and the 36 available I/O pins permit connections to sensors, switches, displays, actuators, and communication peripherals. The W78 8052-compatible core provides a familiar programming model for engineers maintaining or adapting existing 8051-family equipment. Flash-based program memory can simplify field updates because the firmware can be reprogrammed without replacing the device. Exact instruction-set extensions, interrupt-vector details, timer resources, oscillator options, electrical limits, and temperature ratings should be confirmed in the manufacturer datasheet before a new production design is released. Typical applications include appliance control panels, small industrial controllers, data-acquisition modules, keypad interfaces, LED indicators, motor-control supervisory logic, and embedded instrumentation. The 36 I/O count is especially useful when a design must connect multiple discrete inputs and outputs while retaining a single compact controller package. For designs requiring greater processing speed, memory density, or low-power features, the available silicon should be compared against the system timing and peripheral requirements. PCB planning should account for the PLCC package's J-lead geometry, solder-joint access, and thermal cycling requirements. Confirm the land pattern, pin-1 orientation, exposed-pad arrangement, and recommended reflow profile against the official package drawing. Do not assign signals to the 44 package positions until the complete pin description table has been checked because the visible web results do not provide a verifiable pin-by-pin map. This product page consolidates the identified device specifications, sourcing information, engineering guidance, and strict drop-in replacement analysis. It also distinguishes confirmed electrical facts from parameters that still require direct confirmation from the manufacturer documentation before schematic release, PCB layout, or firmware transfer.

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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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W78L801A24DL

W78L801A24DL - 8-bit 8051 24MHz 40-DIP | Winbond

The Winbond Electronics W78L801A24DL is an 8-bit 8051-compatible microcontroller with 4KB of mask ROM, 256 bytes of RAM, 32 I/O pins, a 24MHz clock rating, and a 40-pin DIP package. Its core role is compact embedded control for cost-sensitive products that require reliable logic execution, serial communication, timing, and discrete I/O handling without a large flash-memory footprint. A microcontroller is a semiconductor device that integrates a CPU core, program memory, data memory, I/O ports, timers, and communication peripherals into one integrated circuit. The W78L801A24DL belongs to the 8-bit MCU family and uses an 8051-compatible instruction set, making it suitable for legacy-compatible control logic, compact instrumentation, appliance interfaces, and small embedded systems. Its mask-programmed ROM is appropriate for high-volume products where firmware is fixed during manufacturing. The principal device characteristics include 4KB of program memory organized as 4K x 8, 256 x 8 bits of RAM, 32 I/O lines, and operation up to 24MHz. The device is identified in the 40-DIP package, providing through-hole assembly compatibility and straightforward prototyping. The W78L801 family also supports software-selectable idle and power-down operating modes. In idle mode, processor clock operation stops while selected peripheral functions can continue; power-down mode stops the crystal oscillator for lower power consumption. The W78L801A24DL is appropriate for controllers that need a modest code space and deterministic peripheral handling rather than high-volume flash storage, complex operating systems, or high-speed connectivity. Its 8051-compatible architecture can simplify migration from older 8051 designs. The 24MHz upper speed rating supports faster instruction throughput than many traditional 8-bit designs, although real timing must be checked against the operating voltage and device-specific limits. Typical implementations include small appliance controllers, sensor-interface modules, industrial control panels, lighting-control boards, simple serial-interface equipment, and legacy peripheral controllers. The 32 available I/O lines provide useful connectivity for buttons, indicators, relays, displays, and external logic, while on-chip timers and communication functions reduce the need for additional support components. Design with the 40-pin footprint on the PCB and follow the manufacturer pin-description table when assigning signals. Decoupling must be placed close to the supply pins, oscillator components must follow the recommended layout, and unused inputs should be configured to avoid unintended current or state transitions. The fixed mask ROM also means firmware changes normally require a different programming arrangement or a device revision, making definition-time software locking essential. This page combines the core electrical and packaging characteristics, practical integration guidance, application fit, and replacement constraints. It also distinguishes the W78L801A24DL from merely similar 8051-class devices, because equal package size and clock rating alone do not establish pin-to-pin compatibility.

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W78L801A24FL

W78L801A24FL - 8-Bit 24MHz 44-Pin Microcontroller | Nuvoton

Nuvoton W78L801A24FL is an 8-bit 8051-compatible microcontroller rated for operation from 1.8 V to 5.5 V, with a 24 MHz clock and 4 KB of MROM in a 44-pin QFP package. The W78L801A24FL is positioned for compact embedded-control designs that require a conventional 8051 architecture, low-voltage operation, and a moderate pin count. An 8051 microcontroller is a small, instruction-set-oriented embedded controller used to supervise sensors, switches, displays, communication peripherals, and actuator logic. The 8051 family combines a CPU core, program memory, data memory, timers, serial interfaces, and GPIO functions in one integrated circuit. Because the W78L801A24FL belongs to this established embedded-control category, it is useful for designs that value compact instruction execution, deterministic peripheral control, and broad software familiarity. The device is identified as an 8-bit MCU with 4 KB MROM and a maximum clock frequency of 24 MHz. Its stated operating voltage range of 1.8 V to 5.5 V supports both low-voltage and conventional 5 V system rails. One distributor listing also identifies the family as 51-series, reinforcing its 8051-compatible positioning. The package is specified as QFP-44 in a 10 mm by 10 mm surface-mount format, while another listing describes the package as 44-BQFP. Typical embedded uses include appliance controls, small industrial modules, keypads, LED indicators, sensor-conditioning front ends, programmable logic controllers, and compact consumer products. The 24 MHz operating rate supports timing-intensive control tasks, while the 8-bit architecture is most appropriate when the application is dominated by GPIO, timers, serial communication, and simple state-machine control rather than intensive arithmetic or large graphical interfaces. When laying out a W78L801A24FL board, use the manufacturer pin description table to assign every signal and preserve the exposed-pad, power, ground, clock, reset, and programming connections. Confirm the oscillator frequency, decoupling requirements, and programming interface against the manufacturer datasheet before releasing the PCB. This page combines the available device characteristics with practical application guidance, package information, sourcing support, and an honest comparison framework for engineers evaluating this 8051-family MCU.

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W78L801A24LL

W78L801A24LL 8-Bit 8051 MCU, 4KB ROM, 48-LQFP | Nuvoton

The Nuvoton W78L801A24LL is an 8-bit 8051-family microcontroller with 4KB of mask ROM, a 48-pin LQFP package measuring 7 mm by 7 mm, and an operating voltage range listed as 2.5 V, 3.3 V, or 5 V. It is designed for compact embedded-control designs that require a conventional 8051 architecture, low pin count, and direct peripheral integration rather than a high-performance application processor. A microcontroller is a semiconductor device that integrates a CPU core, program memory, data memory, I/O ports, and peripherals into one package. The W78L801A24LL belongs to the 8051 microcontroller family, which is a CISC-based embedded-processing platform used in appliances, industrial controllers, access equipment, meters, and small automation systems. Its 4KB mask ROM provides a fixed program area for embedded control logic, while the 48-pin LQFP provides a substantial number of external signal connections for digital interfaces and control functions. The key identifiable specifications are the 8-bit CPU architecture, 4KB MROM, 48-pin LQFP package, and 2.5 V, 3.3 V, or 5 V supply options. A distributor listing also identifies the device as an active Nuvoton part and classifies it as a QFP-48 package. The product is associated with an operating-frequency entry of 24 MHz in one listing and 20 MHz in another; the applicable maximum clock for the exact ordering code must therefore be confirmed against the manufacturer datasheet before clock-tree or timing design is finalized. Typical embedded uses include keypad-controlled industrial panels, compact appliance controllers, fan and pump sequencers, digital instrumentation, LED status and drive systems, and small peripheral-control boards. The 8051 instruction set is appropriate when the application favors a mature software ecosystem and deterministic peripheral control over a larger CPU core, larger RAM, high-speed connectivity, or extensive analog conversion resources. Design planning should begin with the manufacturer pin-description table, oscillator requirements, reset behavior, I/O ratings, and memory map. Confirm the exact clock limit, RAM capacity, peripheral set, input thresholds, and output-drive limits before finalizing the schematic. A 48-pin LQFP also requires a land pattern that matches the manufacturer's package drawing, including exposed-pad and thermal-copper requirements where applicable. This product page consolidates the verified package, memory, architecture, supply-voltage, lifecycle, and sourcing information into an engineering-oriented reference. It also distinguishes confirmed device attributes from parameters that require direct datasheet verification and avoids presenting generic cross-reference listings as guaranteed drop-in replacements.

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W78L801A24PL

W78L801A24PL - 24MHz 8-Bit 8051 MCU with 4KB ROM | Nuvoton

Nuvoton Technology Corporation W78L801A24PL is an 8-bit 8051-compatible microcontroller with a 24 MHz clock, 4 KB mask ROM organized as 4K x 8 bits, and a 44-LCC J-lead package. Its operating voltage range is 1.8 V to 5.5 V, making it suitable for embedded control, monitoring, and compact industrial or consumer systems. The device also provides 256 bytes of data memory and software-selectable idle and power-down operating modes for reduced power consumption. An 8-bit microcontroller is a programmable semiconductor that integrates a processor core, program memory, data memory, and peripherals into one device. The W78L801 belongs to the 8051 family, a widely used embedded-control architecture also known as an MCS-51 microcontroller. Its 4 KB mask ROM stores the fixed firmware program, while its 256-byte RAM supports variables, stack operations, and intermediate working data. Applications generally center on sequential control logic, sensor acquisition, keypad or display control, and communication interfaces. The principal operating characteristics include a maximum clock frequency of 24 MHz, an 8-bit processing architecture, 4 KB of mask-programmable ROM, and a 1.8 V to 5.5 V supply range. Two software-controlled power modes help conserve energy. Idle mode stops the processor clock while allowing supported peripheral operations to continue, whereas power-down mode stops the crystal oscillator for minimum power consumption. The external clock may also be stopped without affecting processor state according to the W78L801 datasheet. The W78L801A24PL combines conventional 8051 instruction-set compatibility with a surface-mount LCC implementation. The PL suffix denotes the 44-LCC J-lead package shown in product documentation. Its masked-program architecture is appropriate for high-volume products in which firmware is finalized before production. Because the program memory is mask ROM rather than user-programmable flash, firmware changes normally require a different programmed device rather than an in-circuit update. Typical uses include industrial controllers, appliance-control boards, instrumentation modules, building equipment, and compact embedded systems that benefit from the low-power operating modes. The 24 MHz clock provides additional processing headroom for time-sensitive control tasks, while the 8051 instruction set supports a compact software ecosystem and established development methods. System-level suitability depends on the selected external clock, memory organization, and peripheral requirements described in the datasheet. Designers should verify the exact pin functions, oscillator connections, reset behavior, and available I/O assignments against the manufacturer pin-description table before laying out a PCB. Decoupling, clock stability, exposed programming considerations, and supply sequencing also require normal mixed-signal layout practices. Because this package is a leaded LCC rather than a fine-pitch bare die, assembly planning should account for its 44 J-leads. This page combines the manufacturer-oriented device description with verified product parameters, application guidance, design cautions, and a transparent comparison of what the available technical information establishes. It helps engineers identify whether the W78L801A24PL architecture, memory configuration, clock rate, voltage range, and package align with a new embedded-control design.

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W78L812A24DL

W78L812A24DL - 8-Bit 24MHz 8051 MCU | Nuvoton

Nuvoton Technology Corporation W78L812A24DL is an 8-bit 8051-compatible microcontroller with 24 MHz clocking, 8 KB of flash program memory, 32 I/O pins, and a 40-pin DIP package. Its 2.4 V to 5.5 V operating range supports low-voltage embedded control systems requiring an 8-bit processor with integrated flash memory. An 8-bit microcontroller is a programmable semiconductor designed for embedded control. The W78 series combines an 8051-compatible core, program memory, data memory, and peripherals in one device. Within the embedded-control hierarchy, the W78L812A24DL is an MCU, or microcontroller unit, intended to execute firmware that monitors inputs and controls outputs in appliances, industrial equipment, and compact automation systems. Key features include 8 KB of flash program memory organized as 8K x 8, a maximum clock frequency of 24 MHz, and 32 I/O lines. EBI/EMI and UART/USART interfaces provide external-memory and serial-communication options, while integrated LED and watchdog-timer functions support status indication and system supervision. The stated 2.4 V to 5.5 V operating-voltage range also supports compatibility with common embedded power rails. The device uses an 8-bit data path and an 8051-compatible processor core. Its flash memory permits firmware to be programmed and updated without an external program-memory device, simplifying both production and maintenance. The 40-DIP mechanical package facilitates through-hole assembly and prototyping, although its larger footprint is less suitable for compact surface-mount products than smaller microcontroller packages. Typical applications include appliance controllers, LED status and sequencing systems, industrial control panels, small motor or relay interfaces, serial-connected embedded modules, and educational 8051 platforms. Designers should confirm RAM capacity, detailed timer and peripheral assignments, clock behavior, and all electrical limits against the manufacturer datasheet before creating a production PCB. For a new design, verify the 40-pin footprint, oscillator requirements, reset behavior, and available I/O functions. The DIP package simplifies breadboard and through-hole prototypes, but a high-density production design may require a different package variant and a corresponding PCB redesign. This product page consolidates the confirmed operating specifications, interface capabilities, application guidance, sourcing path, and drop-in-replacement status for engineers evaluating the W78L812A24DL.

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W78L812A24FL

W78L812A24FL - 8-Bit 24MHz 8051 Flash MCU | Nuvoton

The Nuvoton W78L812A24FL is an 8-bit 8051-compatible Flash microcontroller with an operating clock of 24 MHz, 8 KB of Flash EPROM, 256 bytes of RAM, and a 44-pin QFP package. It operates from 2.4 V to 5.5 V and integrates four 8-bit bidirectional I/O ports, an additional 5-bit P4 port, three 16-bit timer/counters, a hardware watchdog timer, and a serial port. An 8051-compatible microcontroller is a compact embedded-control device built around the classic MCS-51 instruction set. Microcontrollers combine a CPU, program memory, data memory, timers, serial communication, and digital I/O on one integrated circuit. This integration allows control systems to monitor inputs, execute embedded software, operate timers, and exchange serial data without requiring a separate processor and supporting components. The W78L812A24FL combines 8 KB of Flash EPROM with 256 bytes of RAM, providing useful program storage for compact embedded applications. Its four 8-bit ports and dedicated P4 port offer multiple digital interfaces, while the three 16-bit timer/counters support periodic events, timing measurements, and waveform generation. The hardware watchdog timer adds an independent mechanism for recovering from stalled program execution. The 24 MHz operating frequency provides a higher instruction-processing rate than lower-frequency members of the same device family while retaining standard 8051 instruction-set compatibility. This makes the device suitable for designs based on established 8051 firmware, industrial controllers, compact instruments, appliance controls, and general-purpose embedded products requiring deterministic digital I/O. Typical uses include motor and actuator sequencing, temperature-instrument signal acquisition, keypad interfaces, LED status panels, programmable timers, and serial-connected control modules. The 2.4 V to 5.5 V operating range supports both lower-voltage and conventional 5 V designs, allowing system designers to choose the MCU around the power architecture of the finished product. PCB design should preserve stable supply decoupling near the power pins and route the oscillator, reset, and high-speed signals according to the manufacturer reference layout. Because the device offers limited RAM, firmware should use the available data memory carefully. Firmware development also benefits from 8051-compatible tools because the instruction set remains compatible with the standard 8051 architecture. This page organizes the principal electrical, memory, peripheral, package, and application characteristics of the W78L812A24FL. It also identifies same-family alternatives and explains the practical distinctions that matter when evaluating an 8051-compatible control IC for an embedded product.

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W78L812A24PL

W78L812A24PL - 8-bit 8051 MCU, 8KB Flash, 24MHz | Nuvoton

The Nuvoton Technology Corporation W78L812A24PL is an 8-bit microcontroller with a fully 8051-compatible instruction set, an 8 KB Flash EPROM program memory, 256 bytes of RAM and a 24 MHz operating frequency, housed in a 44-pin PLCC (PL) package with a 2.4 V to 5.5 V supply range. An 8-bit MCU is the simplest tier of the microcontroller hierarchy: MCU -> 8-bit microcontroller -> 8051 core -> embedded control IC. The W78L812 belongs to the 8051 family of single-chip computers, combining a CPU core, program memory, data memory and peripherals on one die. Because the instruction set is compatible with the standard 8051, existing 8051 assembler, C compiler and bootloader tooling can be reused without architectural changes. Key features include 8 KB of Flash EPROM instead of masked ROM, which allows field re-programming and simplifies product revisions. The device carries 256 bytes of internal RAM plus a 256-byte XRAM area, four 8-bit bi-directional bit-addressable I/O ports (P0 through P3), an additional 5-bit port P4, and three 16-bit timer/counter blocks with interrupt support for timing, pulse counting and periodic event generation. A 24 MHz oscillator gives roughly ten times the execution rate of a classic 12 MHz 8051. Because the instruction set, memory map and port structure follow the established 8051 convention, the W78L812A24PL is a natural fit for cost-sensitive embedded controllers that must run existing 8051 code. The wide 2.4 V to 5.5 V supply range allows direct operation from unregulated industrial rails, 3.3 V systems or rechargeable cells after regulation. Typical applications include smart appliances, small motor controllers, security keypads, industrial sequencers, LED lighting controllers and low-cost data acquisition front ends. Its PLCC package is a strong argument for designs that expect manual soldering or socketed prototyping rather than fully automated SMT assembly. When designing around this device, remember that Flash EPROM programming requires a dedicated programmer, and that the 44-PLCC footprint is not the same as the 40-pin DIP variant of the same family. Confirm the pinout and package drawing from the manufacturer datasheet before laying out the board, and keep decoupling close to the supply pins.

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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

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

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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W79E825AW

W79E825AW - 8-Bit MCU, 16KB ISP Flash, 18 I/O Ports | Nuvoton

The Nuvoton W79E825AW (formerly Winbond W79E825A family) is an 8-bit CMOS microcontroller built around a high-speed 4T (four-clock-per-instruction) core architecture, providing 16 KB of in-system programmable (ISP) Flash program memory, 256 bytes of on-chip RAM, and 256 bytes of data-flash NVM. The device integrates 18 multi-function I/O pins, two 16-bit timer/counters, 13 interrupt sources arranged in four priority levels, one Enhanced full-duplex UART, one I2C bus interface, a programmable Watchdog Timer, four channels of 10-bit PWM, and a 4-channel multiplexed 10-bit A/D converter. According to the manufacturer datasheet, the on-chip oscillator and clock circuitry eliminate the need for an external crystal on many designs, while a selectable instruction cycle architecture balances throughput and power consumption. The W79E825AW shares its fundamental die with the broader W79E82xA family, and is offered in the 'AW' suffix package code. A microcontroller (MCU) is a single-chip computer that integrates a CPU, non-volatile program memory, volatile RAM, and peripheral interfaces into one package; 8-bit MCUs such as the W79E825AW remain widely used in cost-sensitive embedded designs where the processing workload (sensing, key handling, simple state machines, motor pulse trains) fits comfortably within an 8-bit data path. Within the broader semiconductor taxonomy, an MCU belongs to the microcontrollers sub-category of Integrated Circuits, sitting above Logic ICs and beneath microprocessors in capability. The 4T core architecture positions the W79E825AW for one-instruction-per-four-clock operation, providing up to several MIPS per MHz depending on the selected clock source. Key features of the W79E825AW include ISP Flash that supports in-application firmware updates without removing the part from the board, a configurable 4-/2-channel 10-bit PWM block for motor or LED control, a 10-bit ADC that can be routed to multiple I/O pins, and a Brown-out / Watchdog combination for unsupervised recovery from power or code faults. The four-level interrupt controller lets time-critical events preempt background tasks, and the Enhanced UART supports 9-bit address-mode communications for RS-485 multi-drop networks. Typical applications include white-goods control boards, low-end motor drives, simple sensor hubs, IR remote transceivers, and consumer-electronic user-interface modules. The 18 I/O budget covers keypad scanning, LED driving, and small display interfaces without external expanders. When designing with this part, leave at least one UART accessible as a serial debug / ISP window and verify the ISP entry sequence against the In-System Programming section of the manufacturer datasheet to avoid lock-out conditions.

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W79E9781AKG

W79E9781AKG - 8-bit MCU 64KB Flash | Nuvoton | Industrial

The Nuvoton W79E9781AKG is an 8-bit Turbo 51-compatible microcontroller with 64 KB of in-system programmable Flash, 1.25 KB SRAM, and a wide operating voltage range, packaged in a 128-pin LQFP. It integrates a 10-bit ADC, four 16-bit timers, a watchdog timer, a full-duplex hardware UART, an I2C/SPI master interface, and a built-in brown-out detector for industrial-grade reliability. An 8-bit microcontroller (MCU) is a microprocessor-on-a-chip that integrates a CPU, program memory, data RAM, and peripherals into a single IC. The 8-bit architecture is optimized for cost-sensitive, low-power, deterministic control tasks; in the system hierarchy an MCU sits between discrete logic ICs and 32-bit microprocessors, providing firmware-driven I/O handling, sensor interfacing, and protocol conversion. Nuvoton's W79 family extends the legacy 8051 instruction set with Turbo-MCU enhancements, doubling the standard clock-per-instruction cycle for higher throughput at the same crystal frequency. Key features include 64 KB of in-system programmable (ISP) Flash allowing field firmware updates via UART, an operating voltage range of 2.4V to 5.5V that supports both 3.3V and 5V rails, and an industrial-grade operating temperature of -40C to +85C. The on-chip 10-bit ADC provides up to 8 analog input channels, while the four 16-bit timer/counters support PWM generation, capture, and event counting. A dedicated hardware watchdog and brown-out reset circuit protect against code lockup and unstable supplies. The W79E9781AKG uses the standard 8051 instruction set with Nuvoton Turbo-MCU extensions, allowing one machine cycle per clock rather than the original 12, while preserving binary compatibility with legacy 8051 firmware. The device's ISP mechanism boots from a ROM-resident bootloader that re-programs the Flash via the UART pins, eliminating external programming hardware during prototyping and field service. Typical applications include industrial control panels, home appliance main boards, motor control BLDC drivers, smart meter data concentrators, and point-of-sale terminals. The integrated ADC, timers, and UART let designers replace multiple discrete components with a single chip, shrinking BOM cost and PCB area. When designing with this device, plan ISP access by routing the UART pins to a header or optocoupler-isolated connector. Use the brown-out detector level matched to the lowest reliable rail voltage (typically 2.7V for 3.3V systems) to prevent Flash corruption during power-down events. This page consolidates distributor pricing, package-level drop-in alternatives, and engineering design notes that go beyond the manufacturer datasheet, supporting faster component selection and risk-aware substitution decisions.

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W83L951ADG

W83L951ADG - Mobile Keyboard Embedded Controller | Winbond

The Winbond W83L951ADG is a CMOS mobile keyboard and embedded controller fabricated in a 128-pin LQFP (PQFP128) surface-mount package, integrating an 8051-compatible microcontroller core with keyboard scanning, embedded controller, and system management functions for notebook and mobile computing platforms. It was originally produced by Winbond Electronics Corporation, whose embedded controller product line later transferred to Nuvoton Technology, which is why the same MPN appears under both Winbond and Nuvoton branding in distributor catalogs. An embedded controller (EC) is a specialized microcontroller in the power-management hierarchy of a computer system: it is a dedicated, always-on processor that supervises the keyboard matrix, power sequencing, battery charging supervision, thermal sensing, and low-level I/O even while the main CPU is asleep or off. In laptop and mobile designs the EC is the first silicon to wake and the last to sleep, making its firmware and electrical behavior critical to system reliability. Key features of the W83L951ADG include the 8051-derived instruction-set core with embedded firmware memory, an integrated keyboard controller (KBC) compatible with legacy PC/AT keyboard and PS/2 interfaces, general-purpose I/O for board-level control, and low-power CMOS operation suited to battery-powered systems. The device communicates with the host chipset over an LPC (Low Pin Count) style interface used in legacy EC architectures, allowing ACPI-compliant power management event handling. Architecturally, the part follows the classic Winbond/Nuvoton EC family: a single-chip design combining the CPU, program memory, RAM, keyboard matrix scanner, host interface, timers, and GPIO banks, minimizing external component count in dense mobile motherboards. The LQFP-128 package with 0.4 mm lead pitch provides the pin count needed for large keyboard matrix scanning plus numerous GPIO without a larger footprint. Typical applications include laptop and notebook keyboard controllers, embedded system management in x86 mobile platforms, tablet and portable device keyboard scanning, and industrial legacy designs that require PC/AT-compatible KBC functionality. Design consideration: because this device is long past active production, verify remaining authorized stock and confirm firmware compatibility before committing it to a new build; legacy designs should plan a migration path to current Nuvoton EC families. This page synthesizes distributor sourcing data, datasheet availability, drop-in variant information, and practical obsolescence guidance not consolidated in the manufacturer datasheet.

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W9425G6JH-5

W9425G6JH-5 - 256Mbit DDR400 SDRAM, 16Mx16, 2.5V TSOP-II | Winbond

The Winbond W9425G6JH-5 is a 256 Mbit DDR SDRAM organized as 4M x 4 banks x 16 bits, housed in a 66-pin TSOP-II surface-mount package and rated for DDR400/CL3 operation at 2.5V. The -5 speed grade delivers a peak data bandwidth of up to 400 Mwords per second under the JEDEC DDR-I specification, making it suitable for legacy embedded graphics, networking line cards, set-top boxes, and industrial controllers that required double-data-rate throughput in the mid-2000s. The device is fabricated in a CMOS process and includes on-chip refresh, burst counter, and self-refresh support. A DDR SDRAM (Double Data Rate Synchronous Dynamic Random Access Memory) is a type of volatile memory that transfers data on both the rising and falling edges of the clock, effectively doubling the peak throughput of a single-data-rate SDRAM of the same bus frequency. DDR-I sits at the base of the DDR family hierarchy (DDR -> DDR SDRAM -> volatile memory -> DRAM -> semiconductor memory) and was standardized by JEDEC as the JESD79 specification family. Compared to its predecessor SDR SDRAM, DDR-I uses a 2n-prefetch architecture, SSTL-2 I/O, and requires a 2.5V supply for VDD plus a 2.5V supply for VDDQ. Key specifications of the W9425G6JH-5 include 4,194,304 words per bank across 4 banks, a 16-bit data bus width, a CAS Latency (CL) of 3 at DDR400, a 66-pin TSOP-II mechanical outline measuring 0.400 inch wide, and the -5I industrial temperature grade option that supports -40C to +85C. The chip operates from a single 2.5V VDD supply with a separate VDDQ rail terminated to VTT for the SSTL-2 interface. Internally, the device uses a 4-bank architecture with dual-bank operation and supports burst lengths of 2, 4, 8, and full page. The W9425G6JH-5 is constructed with a prefetch I/O scheme synchronized to the internal SDRAM clock, achieving DDR400 compliance when paired with a host controller that drives the SSTL-2 signaling at 200 MHz with 3n CBR. The 4-bank architecture allows interleaved operations across banks while one bank is being precharged, improving effective bandwidth in streaming workloads. Self-refresh mode permits low-power standby retention, making the device suitable for battery-backed or low-duty-cycle embedded systems. Typical applications for the W9425G6JH-5 include DDR1 main memory in industrial PCs, networking switches, digital video recorders, and printer controllers. The wide 16-bit bus simplifies interface to ASICs and low-cost processors without requiring multiple narrow-DRAM chips. Designers choose this Winbond part where Micron, Samsung, and Nanya equivalents are also qualified in 2018. When designing with the W9425G6JH-5, place VTT termination resistors within 1 inch of the DQ/DQS pins and follow JEDEC DDR-I routing guidelines. Decouple VDDQ with 0.1uF and 10uF capacitors near each pin and route DQS in matched-length pairs with the byte lane. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers an actionable single reference for sourcing and design-in of the W9425G6JH-5.

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W948D6FBHX5I

W948D6FBHX5I - 256Mb LPDDR SDRAM 200MHz | Winbond

The Winbond Electronics W948D6FBHX5I is a 256 Mbit Mobile Low-Power DDR (LPDDR / mobile DDR) SDRAM memory IC organized as 4M words x 4 banks x 16 bits, operating at up to 200 MHz with a 5 ns clock cycle, supplied in a 60-ball VFBGA (8x9 mm, 0.80 mm ball pitch) package. LPDDR SDRAM is a volatile DRAM variant optimized for battery-powered and thermally constrained systems. Unlike standard DDR DRAM, mobile LPDDR uses a 1.8 V core supply, deeper power-down modes, a temperature-compensated self-refresh (TCSR) feature, and partial-array self-refresh (PASR) to cut standby current. In the memory hierarchy it sits between SRAM and standard DDR SDRAM, forming the main-memory tier of embedded SoC platforms. Key features of the W948D6FBHX5I include the x16 parallel data interface, which reduces bus width and pin count versus x32 parts, a 200 MHz clock rate supporting LPDDR-200 throughput of 400 MB/s per pin pair, and the industrial temperature variant denoted by the I suffix in the ordering code. The VFBGA ball-grid package minimizes board area at 72 mm2 and improves signal integrity through short, controlled-impedance ball interconnects. Internally the device uses four independent banks with a burst length of 2, 4, or 8, allowing efficient random and sequential access. Power management modes include deep power-down, self-refresh, and power-down, with typical operating current in the tens of milliamp range and standby current in the microamp range when self-refresh is enabled. Typical applications include industrial HMI and gateways, portable medical instruments, telematics and tracking devices, and embedded Linux/RTOS systems where an application processor requires 32 MB of low-power main memory. When designing with this part, match the controller timing registers to the 5 ns cycle time and route the address/control bus as a matched-length fly-by or point-to-point group within the 1.8 V SSTL-18-style I/O regime; series termination is usually unnecessary at this speed for short traces. This page consolidates distributor availability, pricing tiers, drop-in same-family alternatives, and practical design notes not found in the manufacturer datasheet.

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W949D2DBJX5I

W949D2DBJX5I - 512Mb LPDDR SDRAM 200MHz x32 | Winbond

The Winbond Electronics W949D2DBJX5I is a 512Mbit Low Power DDR (LPDDR / Mobile DDR) SDRAM memory IC with a x32 data interface, 200 MHz clock rate (5 ns clock cycle), fabricated on a 46nm DRAM process and housed in a 90-ball VFBGA (8x13 mm) package, qualified for the industrial temperature range. An LPDDR SDRAM is a mobile-optimized variant of double-data-rate synchronous DRAM. Like all DRAM, it stores each bit as charge on a capacitor that must be periodically refreshed, but LPDDR devices reduce core and I/O operating voltage and add low-power modes such as Deep Power Down and Self Refresh so that battery-powered systems can keep volatile memory alive with minimal energy. In the memory hierarchy, the W949D2DBJX5I sits as main system memory, positioned between embedded SRAM caches and non-volatile flash storage. Key features include 512Mbit total density organized for a x32-wide parallel bus, a 200 MHz maximum clock frequency delivering effective double-data-rate transfers on both clock edges, and the space-saving 90-VFBGA 8x13 mm ball grid array that minimizes board area and improves signal integrity for high-speed memory routing. The I temperature suffix designates industrial-grade operating temperature support, and the 46nm process keeps core current low. Technically, the device uses double data rate signaling on the DQ pins, source-synchronous data strobes (DQS) for capture, and programmable mode registers for CAS latency, burst length and burst type configuration per the LPDDR (Mobile DDR) SDRAM standard. Bank and row/column addressing follow the standard LPDDR command set with ACTIVATE, READ, WRITE, PRECHARGE, REFRESH and mode register set commands. Typical applications include portable and industrial embedded systems: main memory for ARM-based application processors, networking and communication modules, telematics and data-loggers, and human-machine interface boards where 64 MByte of low-power DRAM is sufficient. Design consideration: LPDDR shares command/address lines among devices, so careful length-matched routing and proper termination of the 1.8 V-class signaling environment are essential; verify the controller supports the selected CAS latency and burst configuration before layout. This page synthesizes distributor pricing, drop-in family alternatives, pin-level guidance and practical design notes not consolidated in the manufacturer datasheet.

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W949D2DBJX5I-TR

W949D2DBJX5I-TR - 512Mb LPDDR SDRAM 200MHz x32 | Winbond

The Winbond Electronics W949D2DBJX5I-TR is a 512Mbit Mobile LPDDR SDRAM memory IC with a 32-bit parallel data interface, 200 MHz clock frequency, 5 ns access time, and a 90-ball VFBGA (8x13 mm) package, qualified for the -40C to +85C industrial temperature range. Mobile LPDDR SDRAM is a low-power variant of Double Data Rate synchronous DRAM optimized for battery-powered and thermally constrained systems. Within the memory hierarchy, SDRAM sits under the volatile RAM family, distinguished from asynchronous DRAM by a clocked interface and from standard DDR by reduced core voltage, lower I/O swing, and power-saving features such as deep power-down and temperature-compensated self-refresh. Key features include a 1.7 V to 1.95 V supply range (nominal 1.8 V), x32 organization at 512 Mbit density, a 200 MHz clock rate with 5 ns access time, and the compact 90-VFBGA footprint that minimizes PCB area in portable designs. The industrial temperature grade (-40C to +85C) extends usability from consumer handhelds into industrial and networking equipment. Fabricated on a 46 nm DRAM process, the device achieves a favorable balance of density, power and cost. The double-data-rate interface transfers data on both clock edges, doubling effective bandwidth relative to SDR SDRAM at the same clock. Standard LPDDR command set support (CKE-based power-down, self-refresh, mode register programming) allows straightforward controller integration with common SoCs and application processors. Typical applications include embedded industrial controllers, networking and communication equipment, telematics and navigation boxes, portable instrumentation, and battery-buffered data loggers where 64 MByte of low-power program/data memory is sufficient. Designers should observe LPDDR signal integrity requirements: length-match the differential clock to address/command traces, terminate per the datasheet guidelines, and provide a clean 1.8 V core rail with adequate decoupling at each VDD/VDDQ pin pair of the BGA array. This page synthesizes distributor pricing, family alternatives, and practical LPDDR layout guidance not consolidated in the manufacturer datasheet alone. Specifications above are drawn from verified distributor listings (DigiKey, Mouser, JLCPCB) as of 2026-09-14.

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उप-श्रेणियां

उत्पाद (38,000+)

W78L032A24DL - 24MHz 8-Bit ROMless MCU | Nuvoton

W78L032A24FL - 8-Bit 24MHz ROMless MCU | Nuvoton

W78L032A24PL - 8-Bit ROMless 24MHz Microcontroller | Nuvoton

W78L365A24DL - 24MHz 8052 64KB Flash MCU | Nuvoton

W78L365A24FL - 24MHz 8-Bit 64KB MCU | Nuvoton | 44-LQFP

W78L365A24PL - 8-Bit 24MHz 64KB MCU | Nuvoton | PLCC-44

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

W78L801A24DL - 8-bit 8051 24MHz 40-DIP | Winbond

W78L801A24FL - 8-Bit 24MHz 44-Pin Microcontroller | Nuvoton

W78L801A24LL 8-Bit 8051 MCU, 4KB ROM, 48-LQFP | Nuvoton

W78L801A24PL - 24MHz 8-Bit 8051 MCU with 4KB ROM | Nuvoton

W78L812A24DL - 8-Bit 24MHz 8051 MCU | Nuvoton

W78L812A24FL - 8-Bit 24MHz 8051 Flash MCU | Nuvoton

W78L812A24PL - 8-bit 8051 MCU, 8KB Flash, 24MHz | Nuvoton

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

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

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

W79E825AW - 8-Bit MCU, 16KB ISP Flash, 18 I/O Ports | Nuvoton

W79E9781AKG - 8-bit MCU 64KB Flash | Nuvoton | Industrial

W83L951ADG - Mobile Keyboard Embedded Controller | Winbond

W9425G6JH-5 - 256Mbit DDR400 SDRAM, 16Mx16, 2.5V TSOP-II | Winbond

W948D6FBHX5I - 256Mb LPDDR SDRAM 200MHz | Winbond

W949D2DBJX5I - 512Mb LPDDR SDRAM 200MHz x32 | Winbond

W949D2DBJX5I-TR - 512Mb LPDDR SDRAM 200MHz x32 | Winbond