PIC16F877-04/P - 4MHz 8-Bit Flash MCU 14KB | Microchip
MPN： PIC16F877-04/P ✓ 啟用中PIC16F877-04/P 概覽
A microcontroller is a compact integrated circuit that executes programmed instructions and coordinates sensors, actuators, communications, and timing functions. The PIC16F877 belongs to the PIC16 family of 8-bit RISC microcontrollers and provides a broad peripheral set for embedded systems, instrumentation, motor-control support, communications, and legacy control designs. The -04 suffix identifies the 4 MHz speed grade, while /P denotes the PDIP package.
Key features include 8K words of Flash program memory, 256 bytes of EEPROM data memory, 368 bytes of RAM, 33 I/O lines, and a 10-bit ADC with eight channels. The device also provides synchronous serial capabilities configurable for SPI or I2C, a serial port usable as UART/USART, two additional timers, and two capture/compare/PWM functions. Its 40-pin package provides convenient through-hole construction and broad signal access.
The PIC16F877 architecture supports the PIC instruction set and combines EEPROM, Flash programming, and self-programming capabilities. The manufacturer product page describes the device as a 200 ns instruction-execution architecture with 35 single-word instructions. These features make it useful where deterministic control, moderate memory capacity, and a mature peripheral combination are more important than very high clock speed or very large flash capacity.
Typical applications include industrial control panels, data acquisition and instrumentation, educational electronics, motor and relay interfaces, sensor nodes, communications bridges, and legacy embedded products. The ADC supports analog measurement, while UART, SPI, and I2C allow connection to sensors, transceivers, displays, and storage devices. The 33 I/O pins provide flexibility for control and status signals.
For new layouts, verify oscillator, programming, reset, analog, and serial-interface requirements against the manufacturer datasheet before finalizing the PCB. Existing PIC16F877 systems may be easier to maintain with the same device family, but firmware, timing, and pin-level compatibility must be checked whenever the MCU is changed. This page combines verified product facts with practical application guidance and clearly flags unavailable specifications.
直接替換替代品，適用於 PIC16F877-04/P — 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： PIC16F877-04/P （相同外形與佔位） — 差異在於 Package, ADC, Timers, Core Architecture, Operating Temperature Range.
PIC16F877-04E/PQ
✅ 直接替換聯絡詢價
查看資料表 →PIC16F887-E/P
✅ 直接替換聯絡詢價
查看資料表 →PIC16F877-04/P 最大額定值與電氣特性
| Core Processor | 8-bit |
| 最大時脈頻率 | 4 MHz |
| Flash Program Memory | 14 KB (8K x 14 words) |
| EEPROM Data Memory | 256 bytes |
| RAM | 368 bytes |
| Number of I/O Pins | 33 |
| ADC | 8 channels, 10-bit |
| Serial Interfaces | UART/USART, SPI, I2C |
| Timers | Two additional timers |
| Capture/Compare/PWM | Two functions |
| 封裝 | 40-pin PDIP |
| Package Type | Through-hole |
| 工作溫度 | 0C to 70C TA |
| Programming | Flash, self-programming |
| Brown-Out Reset | Supported |
| Power-On Reset | Supported |
| Watchdog Timer | Supported |
PIC16F877-04/P through-hole 腳位配置指南
PIC16F877-04/P（through-hole 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： PIC16F877-04/P.
請參閱 資料表 以查看完整腳位配置。
典型應用
PIC16F877-04/P 適用於 6 應用s: Industrial Control Panels, Data Acquisition and Instrumentation, Motor and Relay Interfaces, Sensor and Communications Nodes, Educational and Prototype Systems, Legacy Communication Bridges.
Industrial Control Panels
PIC16F877-04/P fits legacy industrial control panels that need moderate processing speed, discrete control I/O, analog monitoring, and serial connectivity. Its 4 MHz clock and 33 I/O pins can support relay logic, status indicators, operator inputs, and sensor multiplexing, while the eight-channel 10-bit ADC provides a practical interface for analog transducers. UART/USART, SPI, and I2C allow connection to local displays, sensors, or communications modules. The listed 0C to 70C TA operating range makes it appropriate for indoor or moderate-temperature equipment, but supply voltage and compliance details remain unavailable in the supplied data.
推薦
Data Acquisition and Instrumentation
PIC16F877-04/P is suitable for instrumentation front ends requiring several analog inputs, digital status signals, and flexible communication. The eight 10-bit ADC channels can measure temperature, pressure, potentiometer positions, or other slowly varying analog quantities, while 33 I/O pins support switches, indicators, and measurement-control signals. Serial UART/USART, SPI, or I2C connectivity enables data transfer to a host computer or peripheral. Designers should verify ADC reference, sampling requirements, supply voltage, and calibration strategy against the manufacturer datasheet because those details are not supplied here.
推薦
Motor and Relay Interfaces
PIC16F877-04/P can coordinate motor, relay, and actuator control in legacy embedded systems where a deterministic 8-bit MCU and multiple I/O lines are useful. The 33 available I/O pins can distribute control and feedback signals, while timers and PWM functions support timing-based motor or lamp control. Its 4 MHz operating speed is appropriate for many open-loop or modest closed-loop systems, but exact PWM frequency, timer resolution, and output-drive limits must be taken from the device documentation. Add suitable driver transistors, protection networks, and isolation as required by the load.
推薦
Sensor and Communications Nodes
PIC16F877-04/P works as a small embedded controller for sensor nodes that combine local measurement, digital I/O, and serial communications. SPI can support faster peripheral devices, while I2C is useful for common sensors and EEPROMs; UART/USART provides a straightforward path to a host or modem. The 14 KB Flash and 368 bytes RAM are meaningful for small control firmware, but protocol buffering and logging must be sized carefully. Verify peripheral electrical limits, bus timing, and firmware support before choosing it for a new high-throughput design.
推薦
Educational and Prototype Systems
PIC16F877-04/P remains useful for educational embedded-control platforms because it combines an accessible 8-bit architecture with Flash memory, EEPROM, ADC channels, timers, PWM, and multiple serial interfaces. Students can exercise GPIO, interrupts, timing, analog conversion, and protocol handling in one through-hole DIP device that is easy to place on a prototype board. The 40-pin package exposes more signals than very small modern MCUs, simplifying breadboard and educational wiring. Firmware examples should still follow the exact pinout and configuration requirements of the selected package.
推薦
Legacy Communication Bridges
PIC16F877-04/P can bridge older serial equipment and embedded controllers because it provides UART/USART plus configurable SPI and I2C interfaces. A bridge design can translate between a local sensor or display and a host interface, perform protocol buffering, or monitor control signals. The 368 bytes of RAM and 14 KB Flash are adequate for many compact protocol converters, but throughput and buffering should be calculated for the selected baud rate and packet size. For production use, confirm timing, electrical levels, watchdog behavior, and package availability with current manufacturer data.
推薦
推薦產品摘要
工程參考資料，適用於 PIC16F877-04/P — 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 | PIC16F877-04E/P | PIC16F887 |
|---|---|---|---|
| Core Processor | 8-bit | 8-bit related family variant | 8-bit related family variant |
| Package | 40-pin PDIP | 40-pin PDIP candidate | 40-pin PDIP candidate, verify manufacturer package data |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
主要差異化特點
- Established PIC16F877 legacy platform (對比PIC16F887)
- Broad integrated peripheral set (對比PIC16F877-04E/P)
- Through-hole legacy PCB compatibility (對比PIC16F887)
設計說明
Use the verified 40-pin PDIP footprint and preserve the manufacturer pin numbering exactly. Before routing, confirm oscillator, programming, reset, power, ground, analog, UART/USART, SPI, and I2C assignments from the datasheet because the supplied data does not include a complete pin table. Leave access to programming and debug signals, and avoid placing long traces beside sensitive analog inputs.
Confirm the supply-voltage range and decoupling requirements before final schematic release. The verified data confirms a 4 MHz CMOS Flash MCU with 256 bytes of EEPROM, but it does not state operating-voltage limits or recommended capacitor values. Apply the manufacturer’s supply and layout guidance rather than copying generic values, especially if the ADC reference or oscillator supply shares the same rail.
Do not treat a related family name as an automatic drop-in replacement. The verified cross-reference results identify PIC16F877-04E/P and mention PIC16F887, but they do not establish every pin, timing, temperature, voltage, and peripheral parameter. Review the exact ordering code and datasheet before substituting, particularly when existing firmware depends on oscillator settings, interrupt behavior, ADC calibration, or serial peripheral mappings.
The supplied operating-temperature listing is 0C to 70C TA, but the data does not provide junction-temperature limits, thermal resistance, or maximum dissipation. For enclosed or elevated-temperature equipment, calculate the actual dissipation from the final supply and I/O load, then verify the package and ambient limits against the manufacturer documentation. Use appropriate airflow or copper spreading only after confirming the thermal model.
合規資訊
The supplied verified data does not provide exact compliance statements for PIC16F877-04/P. Obtain current manufacturer or distributor documentation before making a compliance claim.
