W77L058A25PL - 25MHz 8-Bit 8051 MCU | Nuvoton | PLCC-44
MPN： W77L058A25PL ✓ 啟用中W77L058A25PL 概覽
An 8-bit microcontroller is a programmable semiconductor device that integrates a CPU, program memory, data memory, I/O ports, timers, and communication peripherals on one device. The W77L058A25PL belongs to the 8051 microcontroller family within the broader embedded-controller hierarchy. Its four-cycle 8051 core provides predictable instruction execution for motor controls, instrumentation, industrial controllers, and legacy equipment.
Key features include a 25 MHz maximum operating frequency, 32 KB of flash memory, 1 KB of internal RAM, and 36 I/O lines. The 2.7 V to 5.5 V supply range allows operation from regulated 3.3 V and 5 V rails. Its 44-pin PLCC package provides 36 usable I/O pins for digital interfaces, control signals, displays, and external peripheral connections.
The device retains compatibility with the established 8051 architecture while using flash rather than legacy EPROM or mask-programmed memory. This makes it suitable for designs migrating from older 8051 controllers, as well as new embedded products where an 8-bit control engine remains preferable to a higher-cost application processor. The operating frequency provides additional timing margin for interrupt-driven control, serial communication, and periodic sensing tasks.
Typical applications include industrial automation modules, motor and relay controllers, programmable logic controllers, data acquisition equipment, appliance controllers, LED sign controllers, and communication interfaces. Its 36 I/O pins are particularly useful when a design needs multiple discrete control connections without using a larger programmable logic device.
PCB design should preserve the PLCC footprint, socket or land pattern, pin numbering, and adequate clearance around the leaded package. Designers should also account for the 2.7 V minimum operating voltage, configure the oscillator and reset circuitry according to the manufacturer datasheet, and validate unused I/O states before production. A socket can simplify prototype replacement but increases board height and contact resistance compared with direct soldering.
This product page consolidates the verified electrical identity, package information, sourcing path, application guidance, and qualified engineering trade-offs into one technical reference. It also distinguishes the W77L058A25PL from alternatives that may offer similar general-purpose microcontroller functions without providing the required package-level drop-in compatibility.
直接替換替代品，適用於 W77L058A25PL — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
W77G058A25
✅ 直接替換📋 參考替代品（不在目錄中）
W77L058A25PL 最大額定值與電氣特性
| Microcontroller Type | 8-bit microcontroller |
| Processor Architecture | 8051-compatible |
| Maximum CPU Frequency | 25 MHz |
| Machine Cycle | 4-cycle |
| Program Memory Size | 32 KB |
| Program Memory Organization | 32K x 8 bits |
| RAM Size | 1 KB |
| RAM Organization | 1K x 8 bits |
| Number of I/O Pins | 36 |
| Operating Voltage Range | 2.7 V to 5.5 V |
| 封裝 | 44-pin PLCC |
| Package Family | PLCC leaded chip carrier |
| 安裝類型 | Through-hole |
| RoHS 狀態 | unknown |
| REACH Status | unknown |
W77L058A25PL plcc leaded chip carrier 腳位配置指南
W77L058A25PL（plcc leaded chip carrier 封裝）的腳位配置。 此數位 IC 包含 GPIO、通訊介面（UART、SPI、I2C）與電源腳位。替代腳位功能與配置選項請參閱製造商資料表。對嵌入式系統設計與 PCB 佈局至關重要。
無詳細腳位定義資料： W77L058A25PL.
請參閱 資料表 以查看完整腳位配置。
典型應用
W77L058A25PL 適用於 6 應用s: Industrial Automation Controllers, Small Motor and Relay Control, Programmable Logic Controller Modules, Data Acquisition and Instrumentation, Communication Interface Cards, Appliance and Environmental Controllers.
Industrial Automation Controllers
The W77L058A25PL fits compact industrial automation modules that require numerous digital control points and established 8051-compatible firmware. Its 36 I/O pins can connect discrete inputs, relay drivers, status indicators, and operator-interface signals without requiring a larger microcontroller package. The 25 MHz 4-cycle core provides useful execution margin for state machines, scanning routines, and interrupt-driven tasks, while 32 KB of flash accommodates control firmware, tables, and configuration data. The 1 KB RAM is the principal resource constraint, so applications should minimize deep call stacks and large buffering structures. Use galvanic isolation, surge protection, and appropriately rated interface drivers for industrial wiring.
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Small Motor and Relay Control
The W77L058A25PL is appropriate for small stepper, solenoid, valve, and relay-control boards where deterministic digital sequencing matters more than high processor bandwidth. Its 36 I/O lines provide enough parallel control capacity for coil drivers, limit inputs, and status feedback, and the 4-cycle 8051 execution model supports compact timing routines. The 25 MHz operating rate gives designers additional headroom over slower legacy 8051 implementations. Because the MCU does not directly replace power-stage protection hardware, the board must include suitable driver transistors, flyback paths, current limiting, and isolation where required.
推薦
Programmable Logic Controller Modules
The W77L058A25PL can serve as the controller in compact PLC or ladder-logic execution modules that retain compatibility with legacy 8051 development environments. Thirty-six I/O pins allow a single controller package to supervise inputs and outputs, while 32 KB of flash provides space for scan scheduling, diagnostic rules, and communication routines. Its 1 KB RAM limits complex historical-data buffering, but it remains practical for deterministic state machines and modest communications stacks. The PLCC package also allows socketed prototype substitutions and serviceable industrial assemblies, provided the board and enclosure accommodate its leaded geometry.
推薦
Data Acquisition and Instrumentation
The W77L058A25PL is suitable for low-channel instrumentation that combines digital controls with external analog-to-digital and communication converters. Its 36 I/O pins can handle sensor-enable signals, range selection, data-ready inputs, and status outputs, while the 8051-compatible core simplifies migration from established measurement-control code. The 25 MHz clock is useful for timed sampling orchestration, though actual converter throughput depends on the external interface. Because only 1 KB of RAM is available, designers should stream samples or use compact buffering rather than retain long acquisition windows in internal memory.
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Communication Interface Cards
The W77L058A25PL can act as the supervisory controller on legacy communication interface cards using UART, SPI, or other 8051-era peripheral arrangements. Its 36 I/O lines support modem-control signals, routing controls, interrupts, and activity indicators, while 32 KB of flash is adequate for protocol handlers and configuration tables. The 4-cycle 8051 core and 25 MHz operation support common serial routines without requiring a high-performance processor. Engineers should verify peripheral availability, interrupt priorities, oscillator requirements, and programming-model details in the manufacturer documentation before finalizing firmware.
推薦
Appliance and Environmental Controllers
The W77L058A25PL is appropriate for appliance controllers, building controls, and environmental equipment where an 8-bit MCU must coordinate many discrete sensors and actuators. The 36 available I/O lines can handle buttons, indicators, valves, alarms, and discrete sensor inputs, while 2.7 V to 5.5 V operation supports common embedded supply architectures. Its 8051 heritage eases code reuse from older products, and 32 KB flash provides ample space for modest control logic. The limited RAM calls for compact state management, and production firmware should include debouncing, watchdog behavior, brownout response, and safe outputs for power-loss conditions.
推薦
推薦產品摘要
工程參考資料，適用於 W77L058A25PL — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | W77G058A25 |
|---|---|---|
| Brand | Nuvoton Technology Corporation | Winbond Electronics |
| Package | 44-pin PLCC | 44-pin PLCC |
主要差異化特點
- Specified 25 MHz operating speed (對比W77G058A25)
- Documented memory configuration (對比W77G058A25)
- High parallel I/O availability (對比W77G058A25)
設計說明
Use the manufacturer PLCC package drawing to establish the land pattern, courtyard, and drill geometry. Preserve the pin-1 orientation and all 44 physical locations even though the device provides 36 I/O pins; the remaining positions are assigned to power, ground, clock, reset, programming, and other control functions. Avoid relying on generic PLCC drawings because socket and land-pattern details can differ.
Design the supply rail to remain between 2.7 V and 5.5 V under load, including startup and transient conditions. Place local input capacitance at the supply pins and route it through low-impedance paths to minimize disturbance from switching loads. If the board also powers relays, motors, or lamps, use separate filtering and grounding strategies so their transients do not corrupt the controller rail.
Do not treat a functionally similar 8-bit microcontroller as a drop-in replacement. Before substituting W77G058A25 or another candidate, compare the complete 44-pin PLCC pin table, operating voltage, oscillator configuration, memory map, interrupt structure, peripheral assignments, programming method, and timing limits. For production use, validate reset behavior and watchdog recovery under both power-on and power-failure sequences.
Separate clock, reset, and sensitive analog-control traces from motor-switching nodes and high-current relay paths. Provide a compact, low-loop oscillator and decoupling arrangement, and keep programming or debug access reachable for manufacturing and field service. A socketed PLCC assembly simplifies replacement but requires dimensional clearance, mechanical support, and attention to connector cleanliness.
合規資訊
No specific RoHS, REACH, lead-free, halogen-free, conflict-minerals, or automotive qualification statement was identified for this exact ordering code. AEC-Q100 is treated as not applicable because the part is a general-purpose microcontroller rather than an automotive-qualified device.