W77L058A25FL - 8-Bit 80C51 32KB Flash 25MHz MCU | Nuvoton
MPN： W77L058A25FL ✓ 啟用中W77L058A25FL 概覽
An 8-bit microcontroller (MCU) is a self-contained computing element that integrates a CPU core, program memory, data memory and peripherals onto a single die. The classic 8051 core, also called an MCS-51 or C51, remains the most widely installed 8-bit architecture in the industry, and its 4-cycle pipeline (rather than the original 12-cycle design) roughly triples instruction throughput compared with an early 8051. As a member of the wider microcontroller -> embedded processor -> semiconductor hierarchy, this part targets cost-sensitive embedded control rather than signal processing or connectivity.
Key features of the W77L058A25FL include 32 KB of flash program memory for in-circuit programmable firmware, a 25 MHz clock rating that delivers up to 25 million instruction cycles per second, and a 2.7 V to 5.5 V operating range that covers both 3.3 V and 5 V system rails. Because the core is an 8051 derivative, existing assembly routines and Keil C51, SDCC or IAR 8051 toolchains can be reused without architectural rework, protecting firmware investment.
The 44-pin MQFP (10 x 10 mm) footprint balances I/O count against board area, giving designs four 8-bit ports plus dedicated reset, clock and programming pins in a compact square surface-mount package suitable for automated assembly. As an MCU, the device integrates flash, RAM and standard 8051 peripherals (timers, serial ports and interrupt controller) on one die, eliminating the need for external program memory.
Typical applications include small appliance and kitchen equipment controllers, LED driver and dimming modules, household meter and energy-monitoring front panels, industrial sequence controllers, keyboard and panel interface hubs, and compact sensor-node controllers where a 25 MHz 8051 core is sufficient and a 32 KB firmware budget is adequate.
When designing around the W77L058A25FL, verify the pin multiplexing of each port against the peripheral assignment required by your firmware, and keep the decoupling network short: a 0.1 uF ceramic plus a 4.7 uF bulk capacitor at VDD/VSS minimizes brownout risk during flash write cycles. The 44-pin square outline also demands careful lead-frame tooling, so confirm the recommended land pattern and reflow profile before committing to volume production.
This page consolidates distributor availability, pin- and package-matched drop-in alternatives from the same 8051 family, and practical layout and toolchain notes that go beyond the manufacturer datasheet.
直接替換替代品，適用於 W77L058A25FL — 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。
W78E058A25FL
✅ 直接替換📋 參考替代品（不在目錄中）
W79E058A25FL
✅ 直接替換📋 參考替代品（不在目錄中）
W78E052A25FL
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
W79E052A25FL
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
W78E051A25FL
✅ 直接替換 ⚠️ 規格未經驗證📋 參考替代品（不在目錄中）
W77L058A25FL 最大額定值與電氣特性
| Device Type | 8-bit Flash Microcontroller (MCU) |
| Core Architecture | 4-cycle 8051 (C51 compatible) |
| Maximum CPU Frequency | 25 MHz |
| Program Memory (Flash) | 32 KB |
| Supply Voltage Range | 2.7 V to 5.5 V |
| 資料匯流排寬度 | 8-bit |
| 封裝 | MQFP-44 (10 x 10 mm) |
| 腳位數 | 44 pins |
| 安裝類型 | Surface Mount |
| Manufacturer | Nuvoton Technology Corporation (Winbond 8051 family) |
W77L058A25FL mqfp-44 (10 x 10 mm) 腳位配置指南
W77L058A25FL（mqfp-44 (10 x 10 mm) 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： W77L058A25FL.
請參閱 資料表 以查看完整腳位配置。
典型應用
W77L058A25FL 適用於 6 應用s: Small Appliance and Kitchen Equipment Controllers, LED Lighting and Dimming Modules, Energy Meter and Household Sensing Front Panels, Industrial Sequence and Timer Controllers, HMI Panel and Keypad Controller, Battery-Powered Sensor and Metering Nodes.
Small Appliance and Kitchen Equipment Controllers
The W77L058A25FL suits compact appliance controllers where a deterministic state machine drives relays, motors and solenoids. Its 4-cycle 8051 core at 25 MHz executes roughly three times as many instruction cycles per second as a 12-cycle 8051 of the same clock, so timing loops and debounce routines consume less of the scan budget. The 32 KB of on-chip flash holds display, key-scan and motor-control firmware without external memory, while the 2.7 V to 5.5 V range lets the same part run from 5 V or 3.3 V rails. The 44-pin MQFP (10 x 10 mm) footprint keeps the board small enough for panel-mount geometries while exposing four 8-bit ports for keys, displays and triac drive.
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LED Lighting and Dimming Modules
For LED driver and dimming modules, the W77L058A25FL provides the timing reference and PWM generation that a compact lighting board needs. Because the core is a 4-cycle 8051 running to 25 MHz, timer-driven dimming periods and fade algorithms can be updated with fine granularity without a large external DSP. The 32 KB flash holds multiple dimming profiles and logging state, and the wide 2.7 V to 5.5 V input range tolerates both 5 V constant-voltage strips and low-voltage constant-current architectures. Its 44-pin MQFP package provides enough I/O for channel selection, fault feedback and a serial dimming link to a master controller.
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Energy Meter and Household Sensing Front Panels
The W77L058A25FL is appropriate for metering front panels and household sensing devices where a low-power MCU must supervise a measurement front end and report results. The 25 MHz 4-cycle 8051 core has ample headroom for polling measurement channels, running compensation routines and formatting results for transmission. The 32 KB flash stores calibration tables, tariff schedules and multi-protocol firmware revisions, and the 2.7 V to 5.5 V operating range supports both rectified-mains-derived 5 V rails and 3.3 V battery-backed variants. Four 8-bit ports in a 44-pin MQFP (10 x 10 mm) accommodate display strobes, sensor interfaces and a pulse-counting input.
推薦
Industrial Sequence and Timer Controllers
The W77L058A25FL fits industrial sequence controllers and process timers where rugged 8051-based logic has long been the cost-effective norm. Its 4-cycle architecture at 25 MHz executes the interrupt-driven step sequencing typical of relay and contactor logic with margin for debounce and fault handling. Because it is a drop-in 8051 derivative, existing assembly libraries and proven 8051 code modules can be migrated onto the flash-based part with minimal rework. The 44-pin MQFP (10 x 10 mm) package is a standard industrial-assembly outline, and the 2.7 V to 5.5 V range spans 24 V industrial systems with local regulation down to 5 V or 3.3 V.
推薦
HMI Panel and Keypad Controller
The W77L058A25FL works well as a dedicated human-machine interface controller for keypads, rotary encoders and small LCD segment panels. Scanning a full matrix and refreshing displays in a timed interrupt benefits directly from the shortened 4-cycle instruction fetch, which raises effective throughput at the 25 MHz clock and keeps the response time under a few milliseconds. The 32 KB flash is adequate for character maps, multilingual string tables and debounce and long-press handling. Four 8-bit ports in a compact 44-pin MQFP (10 x 10 mm) footprint provide the row/column matrix, backlight control and optional serial link to a host processor without crowding a small front panel PCB.
推薦
Battery-Powered Sensor and Metering Nodes
The W77L058A25FL supports compact sensor nodes because it runs directly from 2.7 V to 5.5 V, which covers single-cell lithium ranges around 3.0 V to 3.6 V as well as 5 V rails, and the established 8051 architecture provides mature idle and power-down modes for duty-cycled designs. At 25 MHz the core comfortably samples sensors, filters readings and frames packets for a host radio, while the 32 KB of flash holds the application and radio interface code without external memory. The 44-pin MQFP (10 x 10 mm) is a widely supported assembly format, and the modest pin count leaves board area for the sensor front end and antenna keep-out.
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推薦產品摘要
工程參考資料，適用於 W77L058A25FL — 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 | W78E058A25FL | W79E058A25FL | W78E052A25FL | W79E052A25FL | W78E051A25FL |
|---|---|---|---|---|---|---|
| Brand | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation | Nuvoton Technology Corporation |
| Package | MQFP-44 (10x10) | MQFP-44 (10x10) - same | MQFP-44 (10x10) - same | MQFP-44 (10x10) - same | MQFP-44 (10x10) - same | MQFP-44 (10x10) - same |
| Core Architecture | 4-cycle 8051 (C51 compatible) | 4-cycle 8051 (C51 compatible) | 4-cycle 8051 (C51 compatible) | 4-cycle 8051 (C51 compatible) | 4-cycle 8051 (C51 compatible) | 4-cycle 8051 (C51 compatible) |
| Maximum CPU Frequency | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz | 25 MHz |
| Supply Voltage Range | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V | 2.7 V to 5.5 V |
| Data Bus Width | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit | 8-bit |
| Programming / Peripherals | In-circuit programmable flash with standard 8051 timers and serial ports | Expanded peripheral set compared with W77L058A25FL | Expanded peripheral set compared with W77L058A25FL | Reduced peripheral set compared with W77L058A25FL | Reduced peripheral set compared with W77L058A25FL | Reduced peripheral set compared with W77L058A25FL |
主要差異化特點
- 4-cycle 8051 core gives roughly 3x the instruction throughput of a classic 12-cycle 8051 at the same 25 MHz clock (對比AT89C51-24JL)
- 32 KB of on-chip in-circuit programmable flash removes the external program memory and enables field re-programming (對比W78E052A25FL)
- Wide 2.7 V to 5.5 V supply tolerance covers 3.3 V and 5 V rails with one part number (對比W79E052A25FL)
- Single-source 44-pin MQFP (10 x 10 mm) footprint across the closest alternatives makes board respins unnecessary (對比AT89C51-24JL)
設計說明
The MQFP (10 x 10 mm) lead pitch and 44 leads mean the copper footprint must follow the manufacturer land pattern exactly, including the exposed thermal/via field if specified. Because MQFP leads are fine and closely spaced on only a 10 mm body, use a no-clean or water-soluble flux compatible with the finish and plan for AOI inspection after reflow. Route oscillator, reset and programming signals away from relay, mains-adjacent and switching-converter traces on the same board.
Decouple each supply pin with a 0.1 uF ceramic capacitor placed within a few millimetres of the pin, and add a 4.7 uF bulk capacitor on the same rail to absorb flash write current steps. Keep the return path of both capacitors inside the device ground reference, and give the ground plane an uninterrupted return under the MCU. Estimated: a 5 V to 3.3 V rail feeding the 8051 core at 25 MHz typically draws single-digit milliampere average current, so a small 4.7 uF bulk part handles transient droop without a larger bulk capacitor.
Do not assume a 12-cycle 8051 timing model in firmware: the 4-cycle core completes most instructions in a quarter of the time, so delay loops calibrated on legacy 8051 parts will be about four times too long and may break protocol timing. Also avoid port multiplexing conflicts by consulting the pin-description table, since several port pins carry alternate serial and timer functions. Finally, confirm the maximum flash write/erase endurance and the brownout behaviour during programming before designing field-update routines.
Place the crystal or external clock network and the reset network close to the device pins, and keep the ground return of the oscillator circuit directly under the oscillator pins to suppress injected noise that can destabilise the 25 MHz timing. If the design drives relays or triacs from the same ports, provide the suppression network at the load and keep those high-current paths off the MCU ground island. For battery-operated variants, isolate the sensing front end so that high-impedance analog inputs are not disturbed by MCU switching edges.
合規資訊
No explicit RoHS, REACH, lead-free or conflict-minerals statements were identified for this part number on the manufacturer or distributor pages reviewed. As a general-purpose 8-bit MCU it is not an AEC-Q100 automotive-qualified device. Confirm compliance status and MSL handling from the manufacturer product documentation before release to production.
