PIC16F877AT-I/L - 8-Bit 20MHz MCU, 14KB Flash | Microchip
MPN： PIC16F877AT-I/L ✗ 停產PIC16F877AT-I/L 概覽
A microcontroller is a compact computer-in-a-chip that executes firmware to monitor inputs and control outputs. The PIC16F877A belongs to the PIC16F family, combining a RISC-based architecture, Flash memory, RAM, peripherals, and I/O in one integrated device. Its 8-bit architecture and 20 MHz maximum frequency make it suitable for industrial automation, consumer electronics, instrumentation, and control systems.
Key features include an 8-channel, 10-bit ADC, 14 KB of Flash memory, and 33 I/O. The supplied distributor data identifies the device as an 8-bit MCU with 14 KB Flash, 368 bytes of RAM, 33 I/O, and a 20 MHz maximum operating frequency. The “AT” portion of the MPN identifies the specified device variant, while “/L” identifies the leaded package option.
The PIC16F877AT-I/L combines a conventional 8-bit control core with on-chip peripherals that reduce external component count. Its Flash-based program memory supports in-system programming and field firmware updates when the system design provides the required programming interface. The 10-bit ADC enables analog sensor acquisition, while the 33 I/O pins provide digital control and communication connections.
Typical applications include industrial automation and machine control, consumer appliances, electronic instrumentation, and automotive systems. In an industrial controller, the MCU can read sensors, execute control logic, drive indicators, and coordinate communication interfaces. In an automotive system, the extended temperature specification supports operation from -40°C to +85°C, subject to the complete system requirements.
Designers should preserve the 44-pin PLCC footprint and verify all pin assignments, power, oscillator, programming, and peripheral connections against the manufacturer datasheet. The PLCC package is not a leadless chip carrier; its gull-wing leads are soldered around the package body. Adequate decoupling and correct oscillator layout are essential for reliable embedded operation.
This page combines verified distributor information, manufacturer-related references, structured comparisons, and practical design guidance for engineers evaluating the PIC16F877AT-I/L.
直接替換替代品，適用於 PIC16F877AT-I/L — 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： PIC16F877AT-I/L （相同外形與佔位） — 差異在於 Timers, Package, ADC, Mounting Type, Operating Temperature.
PIC16F877A-I/L
✅ 直接替換聯絡詢價
查看資料表 →PIC16LF877A-I/L
✅ 直接替換聯絡詢價
查看資料表 →MBRA130LT3G
✅ 直接替換📋 參考替代品（不在目錄中）
PIC16F874A-I/L
✅ 直接替換聯絡詢價
查看資料表 →PIC16C77-20/L
✅ 直接替換聯絡詢價
查看資料表 →PIC16F877AT-I/L 最大額定值與電氣特性
| Product Type | 8-bit microcontroller |
| Maximum Operating Frequency | 20 MHz |
| Program Memory | 14 KB Flash (8K x 14) |
| RAM | 368 bytes |
| Digital I/O | 33 I/O |
| ADC | 8-channel, 10-bit |
| 工作溫度 | -40°C to +85°C |
| 封裝 | 44-pin PLCC (PQCC), 16.59 mm x 16.59 mm |
| Architecture | RISC-based 8-bit |
| Program Memory Type | CMOS Flash |
| 安裝類型 | Surface mount |
| Manufacturer | Microchip Technology |
| Device Family | PIC16F87XA |
| Instruction Execution | 200 ns |
| Instruction Set | 35 single-word instructions |
PIC16F877AT-I/L 44-pin plcc (pqcc), 16.59 mm x 16.59 mm 腳位配置指南
PIC16F877AT-I/L（44-pin plcc (pqcc), 16.59 mm x 16.59 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： PIC16F877AT-I/L.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC16F877AT-I/L 適用於 6 應用s: Industrial Automation Controller, Sensor Monitoring System, Consumer Appliance Control, Automotive Auxiliary Control, Electronic Instrumentation, Communication and Data Acquisition Hub.
Industrial Automation Controller
The PIC16F877AT-I/L fits industrial automation controllers that require an 8-bit control core, 33 digital I/O, and an 8-channel, 10-bit ADC. It can execute sequencing and closed-loop logic while acquiring analog feedback from pressure, temperature, level, or position sensors. The 20 MHz maximum frequency provides timing headroom for interrupt-driven control tasks, while 14 KB of Flash supports control firmware, configuration tables, and diagnostic routines. The 44-pin PLCC package supports a wired-through-hole or compatible PCB land pattern, but the exact pin assignment, isolation strategy, protection network, and regulatory requirements must be verified against the datasheet and system architecture.
推薦
Sensor Monitoring System
The PIC16F877AT-I/L is suitable for a multi-channel sensor-monitoring system because the verified data identifies an 8-channel, 10-bit ADC and 33 I/O. The microcontroller can scan analog inputs, apply calibration and filtering in firmware, compare thresholds, and drive alarm or display-control outputs. Its 14 KB Flash capacity accommodates measurement tables, compensation coefficients, and communication routines, while 368 bytes of RAM supports sampled data and status variables. Because the supplied data does not specify the ADC reference voltage, acquisition time, input impedance, or channel multiplexing details, analog front-end and timing decisions must be based on the manufacturer datasheet rather than inferred specifications.
推薦
Consumer Appliance Control
The PIC16F877AT-I/L can serve as the embedded controller in a consumer appliance where a deterministic 8-bit machine interface is sufficient. Its 33 I/O lines can support switches, indicators, relays, display segments, and control outputs, while the 8-bit ADC can monitor temperature, position, or load-related analog signals. The 20 MHz operating class allows responsive interrupt and timer handling, and the 14 KB Flash memory supports menu logic, operating profiles, and safety-state handlers. The 44-pin PLCC footprint may simplify compatibility with an existing appliance platform, but mains isolation, surge protection, thermal margins, and user-accessible safety controls must be designed independently of the MCU.
推薦
Automotive Auxiliary Control
The PIC16F877AT-I/L can be evaluated for auxiliary automotive control functions because the verified data specifies operation from -40°C to +85°C and provides 33 I/O for switches, actuators, and sensors. The 8-channel ADC can support analog monitoring, while the 8-bit core can implement state machines and diagnostic logic. This use requires a separate automotive qualification review because the supplied data does not state AEC-Q100 qualification, transient immunity, load dump performance, or EMC limits. Power architecture should include reverse-battery and surge protection, and safety-critical decisions should not rely on this component until the complete vehicle-level requirements are verified.
推薦
Electronic Instrumentation
The PIC16F877AT-I/L is appropriate for electronic instrumentation that combines measurement, control, and local communication. The 10-bit ADC can digitize several analog channels, while 33 I/O can operate front-panel buttons, status indicators, relay drivers, and display interfaces. The 14 KB Flash memory provides space for calibration constants, measurement algorithms, command handling, and logging routines. The 368-byte RAM figure should be checked against the chosen buffering strategy, especially for waveform capture or communications. A practical design should isolate analog and digital returns, place decoupling close to supply pins, and provide a stable clock and programming interface as specified by the manufacturer.
推薦
Communication and Data Acquisition Hub
The PIC16F877AT-I/L can be used in a compact data-acquisition hub when the system needs a manageable 8-bit controller with moderate Flash and RAM. It can collect ADC samples, manage digital status inputs, and forward information through a UART, SPI, or other peripheral available on the exact device variant. The 20 MHz clock supports responsive interrupt handling, while 33 I/O leaves flexibility for status LEDs, control signals, and communication transceivers. The supplied data does not identify specific communication peripherals or their electrical limits, so the exact datasheet and pin multiplexing must be checked before selecting external transceivers or assigning connector pins.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16F877AT-I/L — 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/L | PIC16LF877A-I/L | MBRA130LT3G | PIC16F874A-I/L | PIC16C77-20/L |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
主要差異化特點
- Established PIC16F87XA platform with Flash program memory (對比PIC16C77-20/L)
- Direct same-family ordering candidate (對比PIC16F877A-I/L)
- Integrated analog acquisition capability (對比PIC16C77-20/L)
- Broad I/O availability for embedded control (對比PIC16LF877A-I/L)
設計說明
Use the 44-pin PLCC footprint and verify every pad and pin number against the exact PIC16F877AT-I/L datasheet drawing. PLCC packages have gull-wing leads and are not interchangeable with QFN, LQFP, or plastic DIP land patterns without an adapter or PCB redesign. Confirm body size, lead pitch, pin-1 orientation, solderable land geometry, and assembly clearance before releasing a layout.
Place the required supply decoupling capacitors at the PIC16F877AT-I/L power pins with the shortest possible traces and a clear return path to the device ground reference. The supplied data does not specify the power-supply voltage or capacitor values, so do not select those values from this page alone. Follow the manufacturer datasheet for supply limits, decoupling, oscillator, programming, and power-control requirements.
Separate analog inputs and ADC references from high-current switching outputs wherever the PCB area permits. Keep sensor traces short, use a continuous ground reference where appropriate, and route oscillator traces away from switching nodes and communication edges. The supplied data does not provide ADC acquisition-time or reference-voltage values, so analog filtering and grounding must be validated against the complete datasheet.
Do not treat a same-package name as proof of drop-in compatibility. Before replacing PIC16F877AT-I/L with a related order code, compare the complete pinout, Flash programming model, voltage range, oscillator configuration, ADC behavior, interrupts, I/O direction limits, and package markings. In particular, the related PIC16C77-20/L candidate uses a different memory technology according to the supplied comparison snippet.
合規資訊
Compliance information was not included in the supplied verified data. Operating temperature is -40°C to +85°C, but this does not by itself establish AEC-Q100 qualification or any regulatory compliance.
