W77L532A25PL - 8-Bit 25MHz 128KB Flash MCU | Nuvoton
部品番号: W77L532A25PL ✗ 生産終了W77L532A25PL 概要
A microcontroller is a programmable semiconductor that integrates a CPU, memory, I/O, and peripherals into one device. In the product hierarchy, the W77L532A25PL is an 8-bit MCU, part of the 8051-compatible microcontroller family, and a member of the broader embedded-processing and semiconductor categories. It is intended for control rather than general-purpose computing, making it suitable for industrial controllers, embedded instruments, data-acquisition systems, and compact automation products.
The principal device characteristics are a 25 MHz maximum operating frequency, 128 KB of Flash program memory, 1K x 8 RAM, and 36 available I/O lines. Flash program memory supports firmware storage without a separate external memory device, while the 44-pin PLCC package provides a leaded, socket-compatible mechanical format for prototypes and established control-board assemblies. The component is also identified as supporting 3.3 V and 5 V operation, enabling its use in mixed-voltage embedded equipment.
The W77L532A25PL uses the 8-bit W77 8051-compatible instruction set and CISC-oriented embedded-control architecture. Its 36 I/O pins provide connectivity for digital sensors, relays, displays, communication interfaces, and actuator-control signals. This combination of moderate clock speed, internal Flash, and a substantial I/O count is useful when the design requires predictable peripheral control without the complexity of a higher-performance processor. Exact peripheral allocations and electrical limits must be confirmed from the manufacturer’s pin-description table before PCB routing.
Typical applications include programmable industrial controls, serial protocol bridges, relay and solenoid controllers, embedded measurement instruments, test fixtures, and legacy 8051 peripheral expansion. The 128 KB program capacity is particularly useful for firmware containing communications tables, calibration constants, diagnostics, and application-specific state machines. The 36 I/O lines can distribute control traffic across sensors and actuators while keeping the design within a single package.
When integrating the controller, begin with the exact pin-description table, oscillator requirements, and recommended decoupling configuration in the manufacturer datasheet. Preserve the PLCC land pattern, observe the stated operating-voltage range, and validate unused pins according to the device documentation. Because 8051 peripherals and interrupt behavior are architecture-specific, confirm timer, serial, and interrupt resources before assigning them to time-critical functions.
This product page combines the key memory, speed, I/O, and package characteristics with application guidance, pin-placement cautions, and a same-package alternative comparison. It also provides a practical sourcing path through the Request a Quote form, helping engineers evaluate whether the W77L532A25PL fits both the original PCB footprint and the required embedded-control functionality.
ドロップイン代替品: W77L532A25PL — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: W77L532A25PL （同一形状・フットプリント） — 相違点: Device Type, Number of I/O Pins, Package, Program Memory Size, RAM Size.
W77L532A25FL
✅ ドロップイン ⚠️ 仕様未検証価格はお問い合わせください
データシートを見る →W77L532A20PL
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
W77L532A16PL
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
W77L532A10PL
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
W77L532A25PL 最大定格＆電気的特性
| Device Type | 8-bit W77 8051-compatible microcontroller |
| 最大クロック周波数 | 25 MHz |
| Program Memory Size | 128 KB (128K x 8) Flash |
| RAM Size | 1K x 8 |
| Number of I/O Pins | 36 |
| パッケージ | 44-pin PLCC (J-lead) |
| Architecture | 8-bit CISC 8051-compatible |
| 動作電源電圧 | 3.3 V / 5 V |
| 実装タイプ | Surface mount |
W77L532A25PL 44-pin plcc (j-lead) ピン配置ガイド
W77L532A25PL (44-pin plcc (j-lead) パッケージ) のピン配置。 このデジタルICには、GPIO、通信インターフェース (UART、SPI、I2C)、および電源ピンが含まれています。代替ピン機能と設定オプションについては、メーカーのデータシートを参照してください。組み込みシステム設計とPCBレイアウトに不可欠です。
詳細なピン配置データはありません: W77L532A25PL.
詳細は データシート をご参照ください。
主な用途
W77L532A25PL の用途: 6 件s: Industrial Control Boards, Programmable Relay and Actuator Controllers, Embedded Measurement Instruments, Legacy 8051 Peripheral Expansion, Data-Acquisition and Conditioning Systems, Protocol Conversion and Communication Hubs.
Industrial Control Boards
The W77L532A25PL fits compact industrial control boards that combine digital inputs, relay outputs, status indicators, and serial diagnostics. Its 36 I/O pins provide a broad interface budget, while 128 KB of Flash leaves room for firmware, calibration tables, diagnostic messages, and state-machine logic. The 25 MHz clock supports responsive polling and peripheral servicing without requiring a higher-complexity processor. For production equipment, use the 44-pin PLCC land pattern and validate every signal against the manufacturer pin-description table. Confirm temperature, watchdog, isolation, and regulatory requirements separately, because the core MCU specifications do not by themselves establish suitability for safety-critical machinery.
おすすめ
Programmable Relay and Actuator Controllers
The W77L532A25PL is appropriate for relay, solenoid, valve, and lamp-control boards requiring a dedicated microcontroller and numerous digital connections. With 36 I/O lines, it can distribute control and feedback signals across multiple channels, while 1K x 8 RAM supports operating flags and short communication buffers. At 25 MHz, timing loops and status updates can be implemented with greater margin than a 20 MHz same-package alternative. Drive transistors, relays, and protection networks around the MCU rather than loading its I/O pins directly. Check output polarity, isolation, flyback paths, and inductive-load energy limits using the electrical requirements for the complete actuator board.
おすすめ
Embedded Measurement Instruments
The W77L532A25PL can serve as the supervisory controller in embedded measurement instruments where a front-end performs sensing and the MCU manages configuration, calibration, display updates, and data transfer. Its 128 KB Flash capacity is useful for storing menus, calibration coefficients, instrument settings, and diagnostic logic, while 36 I/O lines can connect switches, indicators, displays, and communication transceivers. The 8-bit architecture is appropriate for supervisory rather than high-throughput computation. Confirm the exact peripheral resources and interrupt map in the manufacturer datasheet, then avoid timing-critical sampling routines unless the external measurement path handles the critical timing.
おすすめ
Legacy 8051 Peripheral Expansion
The W77L532A25PL is a practical MCU candidate for adding autonomous control to legacy equipment that already uses an 8051-compatible software model and a 44-pin PLCC footprint. Existing communication routines, timer conventions, and I/O routines can often be adapted more readily than in a migration to a different MCU architecture. The internal 128 KB Flash provides substantial firmware space, and 36 I/O lines support expansion cards, status signals, and isolated interface modules. Before installation, verify oscillator configuration, reset behavior, peripheral addresses, port mapping, and interrupt priorities. A footprint-compatible replacement still requires firmware timing and register-level validation before it can replace the original device safely.
おすすめ
Data-Acquisition and Conditioning Systems
The W77L532A25PL can coordinate low- to moderate-rate data-acquisition systems by handling sensor selection, digital control signals, status reporting, and communication framing. Its 36 I/O lines are useful for multiplexers, amplifiers, range-control signals, trigger inputs, and front-panel interfaces, while the 1K x 8 RAM provides space for working variables and limited buffering. The 25 MHz maximum frequency allows control functions to execute alongside slower measurement operations. The MCU should not perform precision analog conversion unless the datasheet confirms a suitable peripheral and its operating conditions. Validate acquisition timing, interrupt latency, scaling, and calibration algorithms as a complete system.
おすすめ
Protocol Conversion and Communication Hubs
The W77L532A25PL is suitable for compact protocol-conversion or communication-hub products that connect several embedded interfaces and require local buffering or command processing. Its 36 I/O lines can support multiple serial or discrete connections, depending on the peripheral allocation, while 128 KB Flash is adequate for protocol tables, command handlers, and diagnostics. The 8051-compatible instruction set is effective for byte-oriented control logic and straightforward state machines. Confirm the available UART, timer, and interrupt resources in the manufacturer datasheet before assigning channels. Validate baud-rate accuracy and protocol deadlines at the chosen clock frequency, particularly when considering a lower-speed same-package alternative.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: W77L532A25PL — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | W77L532A25FL | W77L532A20PL | W77L532A16PL | W77L532A10PL |
|---|---|---|---|---|---|
| Brand | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation |
| Package | 44-pin PLCC (J-lead) | 44-pin PLCC (J-lead) | 44-pin PLCC (J-lead) | 44-pin PLCC (J-lead) | 44-pin PLCC (J-lead) |
| Maximum Clock Frequency | 25 MHz | 25 MHz | 20 MHz | 16 MHz | 10 MHz |
| Architecture | 8-bit CISC 8051-compatible | 8-bit CISC 8051-compatible | 8-bit CISC 8051-compatible | 8-bit CISC 8051-compatible | 8-bit CISC 8051-compatible |
| Number of Package Pins | 44 | 44 | 44 | 44 | 44 |
| Special Ordering Difference | 25 MHz PLCC ordering code | 25 MHz alternate ordering suffix | 20 MHz PLCC ordering code | 16 MHz PLCC ordering code | 10 MHz PLCC ordering code |
主な差別化要因
- Highest clock rating among the listed W77L532A candidates （vs W77L532A20PL)
- Direct 25 MHz same-package option （vs W77L532A25FL)
- More timing margin than slower same-package alternatives （vs W77L532A16PL)
設計ノート
Use the manufacturer’s 44-pin PLCC land pattern and preserve the documented pin-1 orientation. Verify every power, ground, reset, oscillator, programming, and I/O assignment against the pin-description table before routing. A mechanically similar PLCC footprint is not sufficient by itself: incorrect orientation or an incompatible lead-function mapping can prevent programming or damage adjacent circuitry.
Design the supply network for the selected 3.3 V or 5 V operating condition and apply the manufacturer’s recommended input and bypass capacitors at the supply pins. Keep the power loop compact and route return current consistently. Confirm absolute maximum voltage, output-drive capability, and I/O logic thresholds in the datasheet before connecting external signals, especially when the board also operates at 5 V.
Follow the datasheet’s oscillator layout and keep the clock circuit close to the device to reduce susceptibility to coupling and ringing. Provide stable ground references around sensitive digital paths and separate high-current actuator returns from small-signal grounding where practical. Because the device is an 8-bit MCU with deterministic timing, long unprotected clock or interrupt nets should not be routed across switching nodes.
Do not substitute a lower-clock family member solely because the package matches. Moving from 25 MHz to 20 MHz, 16 MHz, or 10 MHz changes instruction timing by approximately 20%, 36%, or 60%, respectively, which can affect baud rates, timer periods, protocol deadlines, and interrupt latency. After any substitution, recalculate timing and validate the complete firmware against the production peripheral configuration.
コンプライアンス情報
The component is identified as a surface-mount 44-pin PLCC device, but no RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals declaration is stated in the product information.
