PIC16F877A-I/ML - 8-Bit 20MHz 14KB Flash MCU | Microchip
MPN： PIC16F877A-I/ML ✓ 啟用中PIC16F877A-I/ML 概覽
A microcontroller is a complete embedded-control component that integrates a processor core, nonvolatile program memory, data memory, I/O ports, timers, and communication interfaces. Within the hierarchy of semiconductor and embedded systems, a PIC16 microcontroller sits below the broader category of microcontrollers and above application-specific control controllers. The PIC16F877A combines this integration with an established PIC instruction set and software development ecosystem.
Verified distributor information identifies 14 KB of flash program memory organized as 8K by 14 words, 368 bytes of data RAM, 33 I/O pins, and operation up to 20 MHz. The manufacturer snippet also confirms 200 ns instruction execution and only 35 single-word instructions. Other device capabilities—including RAM organization beyond the stated 368 bytes, EEPROM capacity, I/O electrical limits, ADC resolution, USART availability, timer resources, and operating-temperature limits—were not included in the supplied verified data and therefore are not asserted here.
The -I grade suffix denotes the manufacturer's industrial temperature option, but the exact numerical temperature limits are not present in the provided search records. The /ML suffix identifies the 44-pin QFN package and its supported manufacturing configuration. This package differs from the PIC16F877A-I/P 40-pin through-hole variant, so the package suffix and land pattern must be checked before substitution rather than relying only on the base device name.
Typical engineering uses include embedded control, instrumentation, educational MCU platforms, and legacy industrial equipment where a compact 8-bit controller and sufficient I/O capacity are required. The device's 20 MHz maximum clock and 33 I/O pins provide useful control bandwidth for digital state machines, timing functions, and peripheral integration. Firmware performance still depends on instruction count, interrupt structure, memory access, and the selected clock configuration.
When laying out a board, preserve the exposed-pad and land-pattern requirements of the 44-pin QFN, confirm every power and ground connection, and route sensitive interfaces away from noisy switching nodes. Firmware migration also requires validation of configuration words, peripheral registers, interrupt behavior, and application timing rather than assuming binary or peripheral compatibility from a similar PIC16 device.
This page consolidates the verified manufacturer capability statement, distributor package and memory data, lifecycle information, sourcing links, and replacement analysis. It separates confirmed values from missing technical data so engineers can compare the part without relying on unverified parameter guesses.
直接替換替代品，適用於 PIC16F877A-I/ML — 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。
此系列的變體
與下列產品可直接替換的同系列型號： PIC16F877A-I/ML （相同外形與佔位） — 差異在於 Package, Operating Temperature Range, ADC, Program Memory Size, Operating Voltage Range.
PIC16F877A-I/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC16F877A-E/ML
✅ 直接替換聯絡詢價
查看資料表 →PIC16F877A-I/ML 最大額定值與電氣特性
| Device Type | 8-bit CMOS flash microcontroller |
| 最大時脈頻率 | 20 MHz |
| Program Memory | 14 KB (8K x 14 flash words) |
| Data RAM | 368 bytes |
| I/O Pin Count | 33 pins |
| Instruction Execution Time | 200 ns minimum per verified manufacturer statement |
| Single-Word Instruction Count | 35 instructions |
| Architecture | PIC 8-bit RISC architecture |
| Program Memory Technology | CMOS flash |
| 封裝 | 44-pin QFN, 8 mm x 8 mm |
| 安裝類型 | Surface mount |
| Grade | Industrial grade |
| 生命週期狀態 | Active |
PIC16F877A-I/ML 44-pin qfn, 8 mm x 8 mm 腳位配置指南
PIC16F877A-I/ML（44-pin qfn, 8 mm x 8 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： PIC16F877A-I/ML.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC16F877A-I/ML 適用於 6 應用s: Embedded Instrument Control, Educational MCU Platform, Industrial Digital Controller, Data Acquisition Front End, Motor and Automation Controller, Legacy Peripheral Emulation.
Embedded Instrument Control
PIC16F877A-I/ML fits instrument-control boards that need a compact 8-bit controller with 20 MHz operation, 14 KB of program Flash, 368 bytes of RAM, and 33 I/O pins. The QFN package reduces board area compared with a 40-pin through-hole arrangement, while the processor's 200 ns minimum instruction-execution statement supports responsive digital control loops. The MCU can supervise switches, indicators, sensors, and actuators when those functions fit its available pins and verified electrical limits. Before schematic capture, confirm operating voltage, ADC specifications, timer resources, and serial interfaces from the manufacturer datasheet.
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Educational MCU Platform
PIC16F877A-I/ML is suitable for educational embedded-systems platforms because its verified 20 MHz clock, 14 KB Flash, and 368-byte RAM provide enough scale for interrupts, timers, serial communication experiments, and small control projects. Its established PIC architecture and 35 single-word instructions offer a manageable learning model. The 44-pin QFN package is less convenient for hand soldering than a through-hole package, so training boards should provide suitable land patterns, thermal-pad handling, and accessible programming and debug connections.
推薦
Industrial Digital Controller
PIC16F877A-I/ML can serve as the central controller in compact industrial digital modules where an 8-bit MCU, 20 MHz maximum clock, and 33 I/O pins are sufficient. Its industrial-grade ordering code is relevant to equipment operating outside consumer-only conditions, although the exact numerical temperature limits must be checked before release. Design the power, input protection, and output drivers independently from the MCU, and verify timing margins for relays, displays, sensors, and communication links under worst-case loading.
推薦
Data Acquisition Front End
PIC16F877A-I/ML can coordinate data-acquisition logic when its verified 14 KB Flash, 368-byte RAM, and 33 I/O pins fit the buffering and sequencing requirements. The MCU can organize control signals around analog front ends, although ADC resolution, sample capability, input range, and acquisition timing are not stated in the supplied verified records. Confirm those specifications in the official datasheet, partition analog and digital return currents, and avoid feeding switching-node noise into precision sensor paths.
推薦
Motor and Automation Controller
PIC16F877A-I/ML is appropriate for small automation and motor-control supervisory boards when firmware sequencing and I/O density are more important than a high-performance digital motor loop. The 20 MHz clock supports deterministic state-machine logic, while the 33 I/O pins can connect position, limit, interlock, and command signals. External drivers, current sensing, and protection remain necessary; the supplied data does not verify PWM resolution, capture/compare channels, ADC performance, or motor-control timings, so those functions require datasheet confirmation.
推薦
Legacy Peripheral Emulation
PIC16F877A-I/ML can support compatibility designs that need to reproduce the behavior of established PIC16F877A-based equipment. Its 20 MHz maximum clock, 14 KB program memory, 368-byte RAM, and 33 I/O pins match the target device's verified baseline, allowing existing control logic to be retained when the original package is unavailable through qualified sourcing. Successful substitution depends on exact configuration words, reset behavior, interrupts, peripherals, and timing. Firmware should be regression-tested at voltage and temperature extremes before production deployment.
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推薦產品摘要
工程參考資料，適用於 PIC16F877A-I/ML — 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 | PIC16F877A-I/ML | PIC16F877A-E/ML |
|---|---|---|---|
| Package | 44-QFN (8x8 mm) | 44-QFN (8x8 mm) - same | 44-QFN (8x8 mm) - same suffix designation |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
主要差異化特點
- Exact verified package identity (對比PIC16F877A-I/P)
- Confirmed performance baseline (對比PIC16F877A-E/ML)
- Application-specific industrial grade (對比PIC16F877A-E/ML)
設計說明
Design the footprint from the official 44-pin QFN drawing rather than treating all ML variants as generic QFN packages. Confirm pad dimensions, pin numbering, terminal-pitch details, solder-mask policy, and the exposed thermal pad connection before release. The verified data confirms an 8 mm by 8 mm 44-QFN package but does not supply the land pattern, so dimensions must be taken from the manufacturer package drawing.
Decouple each applicable supply pin at the package with the capacitance and placement required by the manufacturer datasheet. Keep high-current return paths compact and route digital and analog returns so switching loads do not share noisy current paths with precision inputs. Operating voltage, absolute maximum ratings, and pin-specific limits are [DATA_NEEDED] in the supplied records and must not be inferred from the 20 MHz clock rating.
Reserve programming and debug access according to Microchip's supported interface and the selected development tool. Place test points where they do not compromise QFN assembly or expose sensitive nodes. Because the verified record does not include a complete pinout, freeze board connectivity only after checking every 44-pin symbol, programming connection, supply, ground, and exposed-pad assignment against the official datasheet.
Do not substitute PIC16F877A-I/P for PIC16F877A-I/ML on an existing board: the former is a listed 40-pin through-hole package and the latter is a 44-pin QFN. Likewise, a similarly named PIC16F887 or PIC18 device may be only a functional alternative. Validate exact package, pin functions, memory, peripherals, configuration words, interrupts, voltage, timing, and firmware before approving a replacement.
合規資訊
The supplied verified records state that the device is active but do not provide RoHS, REACH, lead-free, halogen-free, or conflict-minerals declarations. No compliance status has been inferred. AEC-Q100 is marked not applicable because no automotive qualification claim was supplied for this industrial-grade MCU.
