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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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W971GG6JB-25I

W971GG6JB-25I - 1Gb DDR2 SDRAM, 800MHz, Industrial | Winbond

The Winbond W971GG6JB-25I is a 1 Gbit DDR2 SDRAM organized as 8M words x 8 banks x 16 bits, housed in an 84-ball WBGA package (8 x 12.5 mm). The -25I speed grade supports a clock frequency of 400 MHz (DDR2-800) with data rates up to 800 Mb/s/pin, while the underlying die family extends to DDR2-1066 for higher-grade speed bins. A DDR2 SDRAM (Double Data Rate 2 Synchronous DRAM) is a volatile dynamic random-access memory that transfers data on both clock edges, doubling the effective bus rate versus DDR1. It belongs to the hierarchy SDRAM -> DRAM -> volatile memory -> semiconductor, and is widely used as main working memory in embedded systems, set-top boxes, networking equipment, automotive infotainment, and graphics subsystems. The 'I' suffix indicates the industrial temperature grade (-40 C to +85 C). Key features of the W971GG6JB-25I include 1.8 V SSTL_18 compatible I/O, on-die termination (ODT), programmable CAS latency (typically 5/6 for DDR2-800), and a 4-bit prefetch architecture. The device supports burst lengths of 4 and 8, on-die DLL for clock alignment, and selectable read/write termination strengths. The WBGA-84 package is JEDEC standard for DDR2 x16 devices, enabling drop-in compatibility with other vendors' x16 DDR2 SDRAMs of the same density and speed grade. Architecturally, the W971GG6JB uses 8 internal banks to enable concurrent row activation across banks, hiding precharge and activate latencies. The -25I bin is qualified for industrial operation and is suitable for automotive non-safety applications where AEC-Q100 is not mandated. The 'A' and 'K' suffixes in the family target full automotive AEC-Q100 qualification. Typical applications include automotive infotainment head units, industrial HMI panels, IPTV/set-top box main memory, networking line cards, and printer image buffers. It is also used in point-of-sale terminals and ruggedized industrial PCs that require a robust, JEDEC-standard DDR2 footprint. When designing with this device, follow the JEDEC DDR2 layout guidelines: maintain matched-length trace pairs for DQ/DQS, place VTT termination at the middle of the bus, and provide proper decoupling (typically 0.1 uF plus bulk) near each VDD/VSS ball. A 50 ohm impedance for SSTL_18 signaling is recommended. This page synthesizes distributor pricing, same-family DDR2 alternatives, and JEDEC-compliant layout notes not consolidated in the manufacturer datasheet.

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W971GG6NB-6

W971GG6NB-6 - 1Gb DDR2-667 SDRAM x16 84-TFBGA | Winbond

The Winbond W971GG6NB-6 is a 1Gbit DDR2 SDRAM organized as 8M x 8 banks x 16 bits per chip, operating at a 667 Mbps data rate (DDR2-667) in a compact 84-ball TFBGA (8x12.5 mm) package. It is the -6 speed-grade variant of the W971GG6NB family and is sorted into multiple grade parts including -18, 18I, 18J, -25, 25I, 25J and -3, where the -18/18I/18J grades are compliant to the DDR2-1066 (6-6-6) specification and the -25/25I/25J grades target the DDR2-800 specification. A DDR2 SDRAM is a synchronous dynamic random-access memory that transfers data on both clock edges (double data rate) while operating from a 1.8V SSTL_18 interface. It belongs to the broader DRAM family (SDRAM -> DDR -> DDR2) and is positioned between DDR and DDR3 in the JEDEC memory hierarchy, offering higher bandwidth than DDR while consuming lower power than DDR3 thanks to the 1.8V supply rail. Key features of the W971GG6NB-6 include 8 internal banks for concurrent operations, on-chip termination (Dynamic ODT), auto precharge, data mask (DM) function for write masking, and programmable CAS latency. The chip is supplied from a single 1.8V power rail with a separate 1.8V VDDQ for the DQ bus and supports self-refresh and power-down modes for low standby power. The 84-ball TFBGA package provides a small footprint suitable for high-density designs. The W971GG6NB-6 architecture uses a double data rate interface that prefetches 4n-bit per I/O per clock cycle, doubling effective throughput without raising the core clock. Programmable impedance matching, calibrated on-die termination, and write leveling simplify board-level signal integrity at the 667 Mbps operating point, making the part straightforward to integrate on standard JEDEC-compliant DDR2 controllers. Typical applications include set-top boxes, networking equipment, LCD TVs, industrial PCs, printers, and embedded systems that need a cost-effective 1Gbit x16 DDR2 memory. The 84-ball TFBGA footprint and JEDEC-standard command set also allow it to be used as a boot RAM or working memory on SoCs that integrate DDR2 controllers. When designing with this device, follow JEDEC DDR2 PCB layout rules: maintain 50 ohm single-ended impedance on the DQ/strobe traces, route DQS and CLK with controlled length matching, and provide a clean 1.8V supply with bulk decoupling near each chip. Note that the -6 grade targets DDR2-667 timing; if your design needs higher bandwidth, consider the -18 or -25 grade parts in the same family. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for evaluating W971GG6NB-6 in cost-sensitive DDR2 designs.

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W971GG6SB25I

W971GG6SB25I - 1Gbit DDR2 SDRAM | Winbond | 84-WBGA

The Winbond W971GG6SB25I is a 1Gbit DDR2 SDRAM organized as 8M words × 8 banks × 16 bits, housed in an 84-ball TFBGA / WBGA (8.0 × 12.5 mm) package. The “25I” speed grade corresponds to a 400 MT/s (DDR2-800) command rate with a 200 MHz clock and approximately 57.5 ns random access time. It is the industrial-temperature grade variant of the W971GG6SB family, qualified from -40 °C to +85 °C. The 1.8 V nominal VDD/V_DDQ makes it the standard JEDEC-compliant DDR2 device for embedded and consumer platforms where density, cost, and the DDR2 pinout footprint must all be satisfied. A DDR2 SDRAM is the second-generation Double Data Rate Synchronous DRAM technology standardized by JEDEC. JEDEC defined DDR2 to quadruple the minimum prefetch width from 2n to 4n (4-bit I/O per clock edge) over DDR, allowing lower clock frequencies at the same data rate, an on-die termination (ODT) scheme for signal integrity, and stricter voltage and timing budgets. Operationally, DDR2 sits between DDR1 and DDR3 in the SDRAM evolution and uses SSTL-18 I/O, a 1.8 V supply, and a separate write-termination concept. The hypernym chain for this part is therefore: DDR2 SDRAM → SDRAM → DRAM → volatile memory → memory IC → semiconductor. Key features of the W971GG6SB25I include: 1 Gbit density at 200 MHz / 400 MT/s (DDR2-800 6-6-6 timing); industrial temperature range of -40 °C to +85 °C for rugged and outdoor use; a 16-bit data bus width to maximize throughput per access; on-die termination (ODT) and a calibrated impedance matching to simplify the PCB layout; an 84-ball TFBGA / WBGA surface-mount package measuring 8 × 12.5 mm, suitable for compact notebooks, set-top boxes, and industrial boards; and synchronous pipelined architecture with auto-refresh and self-refresh capability for low-power standby. Internally, the W971GG6SB25I uses a 4-bit prefetch architecture with 8 banks. The dual-bank operation combined with the 4n prefetch lowers power consumption and signal-edge demand on the bus, while the multi-bank structure enables concurrent operations (activate one bank while reading another) for high throughput. Backward compatibility with the standard DDR2 command set is preserved, simplifying integration with CPUs, SoCs, and FPGAs that already expose a DDR2 controller. Typical applications for the W971GG6SB25I include: industrial control boards needing an operating range down to -40 °C; network routers, switches, and home gateways that need 1 Gbit on a 16-bit bus; set-top boxes, IPTV, and digital video recorders; automotive telematics and infotainment sub-systems (where a full AEC-Q100 part is not required); and embedded computing platforms built around x86, ARM, or MIPS SoCs that expose a DDR2 controller. Design considerations: a 1.8 V low-noise regulator with ±5% tolerance is required; PCB trace lengths must be matched per byte group (tolerances of ≤ 25 ps typically) and the ODT calibrated to the chosen drive strength; decoupling must use 100 nF + 1 µF + 10 µF capacitor combinations at each VDD/V_DDQ ball pair. This page synthesizes Winbond datasheet data, distributor pricing, cross-reference alternatives, and practical layout notes not found together in any single source.

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W972GG6KB-25

W972GG6KB-25 - 2Gb DDR2-800 SDRAM x16 84-WBGA | Winbond

The Winbond W972GG6KB-25 is a 2-Gbit (128M x 16) DDR2 SDRAM organized as 134,217,728 words x 16 bits x 4 banks, supplied in an 84-ball WBGA (8x12.5 mm) package and operating from a single 1.8 V supply. The -25 speed grade corresponds to a tCK of 2.5 ns, equivalent to DDR2-800 (400 MHz data rate, 800 MT/s), with a row access time (tRAC) of 57.5 ns. It supports SSTL_18 stub-series-terminated logic, on-die termination (ODT), and auto-precharge with data-mask and dynamic-ODT features. DDR2 SDRAM (Double Data Rate 2 Synchronous DRAM) is a synchronous volatile memory class that transfers data on both clock edges and uses a 1.8 V supply to halve the power of first-generation DDR. In the wider system hierarchy it sits between DDR1 and DDR3, in the taxonomy: SDRAM -> DDR SDRAM -> DDR2 SDRAM -> DRAM -> volatile memory IC. Its JEDEC-defined features (posted CAS, OCD calibration, off-chip driver strength adjustment) make it a workhorse for embedded networking, imaging, and consumer designs that need >400 MT/s bandwidth without migrating to DDR3 footprints. Key features include four internal banks, programmable CAS Latency (3, 4, 5, 6), programmable burst length (4 or 8 with sequential or interleave modes), differential clock inputs (CK, /CK), and a 2-bit refresh control (1x or 4x). The 84-WBGA ballout follows JEDEC standard for x16 DDR2 and is pin-compatible with industry-standard 2-Gbit DDR2 SDRAMs, simplifying second-source qualification. Industrial temperature option (-25I) is available down to -40 C. Typical applications include 720p/1080p video buffering in IP cameras and DVRs, frame buffers in industrial HMI panels, networking line cards requiring 800 MT/s bandwidth, and digital photo frames or set-top box main memory. The combination of x16 width and 1.8 V operation matches legacy DDR2 host controllers without level shifting. When designing with the W972GG6KB-25, follow JEDEC DDR2 PCB layout rules: matched-length CK//CK traces within 5 mils, 50 ohm controlled impedance, VTT termination at 0.9 V via 4.7 uF decoupling, and VREF generation at 0.9 V with 1% tolerance. Decoupling requires 0.1 uF plus 4.7 uF per pin group. This page synthesizes Winbond datasheet parameters, distributor pricing, drop-in equivalents, and PCB layout considerations not consolidated on a single OEM page.

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W9751G6KB-25

W9751G6KB-25 - 512Mb DDR2-800 SDRAM, x16, 84-WBGA | Winbond

The Winbond W9751G6KB-25 is a 512-Mbit Double Data Rate 2 (DDR2) Synchronous DRAM organized as 32M words by 16 bits, supplied in an 84-ball Thin Fine-Pitch Ball Grid Array (TFBGA / WBGA) measuring 8 x 12.5 mm. The -25 speed grade delivers a clock rate of 400 MHz (DDR2-800), a 57.5 ns CAS latency timing window at full speed, and a 1.8 V typical operating supply, making it a compact, low-power volatile memory solution for embedded computing platforms. A DDR2 SDRAM is a volatile random-access memory that transfers data on both the rising and falling edges of the clock, doubling the effective data rate of the underlying SDR bus. DDR2 sits in the SDRAM family hierarchy alongside DDR, DDR3, DDR4, and DDR5, and uses a 4-bit prefetch architecture (vs DDR's 2-bit prefetch) to achieve higher throughput at lower clock frequencies. DDR2 devices remain common in cost-sensitive industrial, automotive infotainment, set-top box, networking, and printer applications where the memory controller already supports the JEDEC DDR2 standard and high-density LPDDR alternatives are unnecessary. Key features of the W9751G6KB-25 include the x16 organization, programmable CAS latency (typically 3 to 6), programmable burst length of 4 or 8, on-die termination (ODT), and a self-refresh mode for low standby power. The 8K refresh cycles specification (per JEDEC DDR2) supports standard commercial operating profiles, and the 84-ball WBGA package provides short, controlled-impedance signal paths for reliable 800 MT/s operation. The device is built on a CMOS process and conforms to the JEDEC DDR2 SDRAM standard, enabling drop-in compatibility with other DDR2-compliant memory controllers. Common use cases include frame buffers for displays, working memory for industrial PCs, scratch RAM for Linux/WinCE SoCs, and buffer memory in networking switches. When designing with the W9751G6KB-25, route the 16-bit data bus (DQ0-DQ15), differential clock pair (CK, /CK), command/address bus, and data strobes (DQS, /DQS) with matched lengths and 50 ohm controlled impedance. Place VTT termination, decoupling capacitors, and VREF generation per JEDEC recommendations to achieve a clean 800 MT/s eye at the receiver. This page synthesizes distributor pricing for the W9751G6KB-25, drop-in compatible DDR2 alternatives from Winbond and competitors, and practical PCB layout and termination guidance that augments the manufacturer datasheet.

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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

W971GG6JB-25I - 1Gb DDR2 SDRAM, 800MHz, Industrial | Winbond

W971GG6NB-6 - 1Gb DDR2-667 SDRAM x16 84-TFBGA | Winbond

W971GG6SB25I - 1Gbit DDR2 SDRAM | Winbond | 84-WBGA

W972GG6KB-25 - 2Gb DDR2-800 SDRAM x16 84-WBGA | Winbond

W9751G6KB-25 - 512Mb DDR2-800 SDRAM, x16, 84-WBGA | Winbond