Product Overview
The PIC16F877-20I is the industrial-temperature version of the classic PIC16F877 40-pin, 8-bit Flash-based CMOS microcontroller from Microchip Technology. Featuring the Mid-Range PIC architecture with 35 instructions and an 8-level deep hardware stack, this widely-used MCU offers 14KB (8K x 14 words) of Flash program memory, 368 bytes of RAM, and 256 bytes of data EEPROM. Operating at up to 20 MHz with a 200 ns instruction cycle (5 MIPS) across an industrial temperature range of -40°C to +85°C, it integrates an 8-channel 10-bit ADC, two analog comparators, two Capture/Compare/PWM (CCP) modules, a Synchronous Serial Port (SSP) for SPI/I2C, a Universal Synchronous Asynchronous Receiver Transmitter (USART), and a Parallel Slave Port (PSP). The ‘-20I’ suffix denotes 20 MHz maximum frequency with industrial temperature grade, making it suitable for harsh environments where the commercial-grade PIC16F877-20 cannot operate reliably.
Key Specifications
| Core Architecture | 8-bit PIC (Mid-Range Core) |
| Program Memory | 14KB Flash (8K x 14 words) |
| RAM | 368 bytes |
| Data EEPROM | 256 bytes |
| Maximum Speed | 20 MHz (5 MIPS) |
| Operating Voltage | 2.0V to 5.5V |
| I/O Pins | 33 |
| ADC | 10-bit, 8 channels |
| Comparators | 2 |
| Timers | 2 x 8-bit (TMR0/TMR2) + 1 x 16-bit (TMR1) |
| PWM | 2 x CCP (Capture/Compare/PWM), 10-bit |
| Communication | SPI, I2C (SSP), USART |
| Parallel Port | PSP (Parallel Slave Port), 8-bit |
| Oscillator | External (RC, XT, HS, LP, EC options) |
| Stack Levels | 8 |
| Interrupt Sources | Up to 14 |
| Operating Temperature | -40°C to +85°C (Industrial) |
| Package | 40-pin PDIP / 44-pin PLCC / 44-pin TQFP |
Features
- Industrial temperature range: -40°C to +85°C
- High-performance RISC CPU with only 35 single-word instructions
- All single-cycle instructions except program branches (two cycles)
- 8-level deep hardware stack
- Direct, indirect, and relative addressing modes
- Up to 14 interrupt sources with automatic context saving
- 8-channel 10-bit Analog-to-Digital Converter (ADC)
- Two analog comparators with programmable on-chip voltage reference
- Two Capture/Compare/PWM (CCP) modules: 16-bit capture, 10-bit PWM
- Synchronous Serial Port (SSP) with SPI (Master/Slave) and I2C (Slave)
- Universal Synchronous Asynchronous Receiver Transmitter (USART/SCI)
- Parallel Slave Port (PSP) with 8-bit wide read/write interface
- 256 bytes of data EEPROM for non-volatile storage
- Timer0: 8-bit timer/counter with 8-bit programmable prescaler
- Timer1: 16-bit timer/counter with prescaler, can increment during Sleep
- Timer2: 8-bit timer/counter with period register, prescaler, and postscaler
- Power-on Reset (POR), Power-up Timer (PWRT), Oscillator Start-up Timer (OST)
- Brown-out Reset (BOR) with brown-out detection circuitry
- Watchdog Timer (WDT) with on-chip RC oscillator for reliable operation
- In-Circuit Serial Programming (ICSP) via two pins
- Programmable code protection for program and data memory
- Power-saving Sleep mode for low-power applications
- High sink/source current: 25 mA per I/O pin
- Pinout compatible with PIC16C77 and PIC16F77
Applications
- Industrial control systems and factory automation
- Automotive under-hood electronics
- Outdoor and harsh-environment equipment
- Motor control and industrial drives
- Remote sensor monitoring in extreme temperatures
- Power supply and energy management systems
- Industrial data acquisition and logging