Product Overview
The PIC16F677-I is a 20-pin, 8-bit Flash-based CMOS microcontroller from Microchip Technology featuring a 12-channel 10-bit ADC and synchronous serial port (SSP) with SPI and I2C. Based on the Mid-Range PIC architecture with 35 instructions and an 8-level deep hardware stack, it offers 3.5KB (2K x 14 words) of Flash program memory, 128 bytes of RAM, and 256 bytes of data EEPROM. Operating at up to 20 MHz with a 200 ns instruction cycle, this MCU integrates a precision 8 MHz internal oscillator factory calibrated to ±1%, two analog comparators, and nanoWatt Technology for ultra-low power operation. With its rich analog and digital peripheral set in a compact 20-pin package, the PIC16F677 is ideal for sensor interfaces, industrial control, battery-powered monitoring systems, and consumer applications requiring analog-to-digital conversion and serial communication.
Key Specifications
| Core Architecture | 8-bit PIC (Mid-Range Core) |
| Program Memory | 3.5KB Flash (2K x 14 words) |
| RAM | 128 bytes |
| Data EEPROM | 256 bytes |
| Maximum Speed | 20 MHz (5 MIPS) |
| Operating Voltage | 2.0V to 5.5V |
| I/O Pins | 18 |
| ADC | 10-bit, 12 channels |
| Comparators | 2 |
| Timers | 1 x 8-bit (TMR0) + 1 x 16-bit (TMR1) |
| PWM | None (CCP available on higher variants) |
| Communication | SPI, I2C (MSSP module) |
| Internal Oscillator | 8 MHz (±1% factory calibrated) |
| Stack Levels | 8 |
| Operating Temperature | -40°C to +85°C (Industrial) |
| Package | 20-pin PDIP / SOIC / SSOP / QFN |
Features
- Mid-Range PIC architecture with 35 single-cycle instructions and 8-level stack
- 12-channel 10-bit Analog-to-Digital Converter (ADC) with successive approximation
- Master Synchronous Serial Port (MSSP) with SPI and I2C (7-bit address masking, SMBus/PMBus compatible)
- Precision internal oscillator: 8 MHz factory calibrated to ±1%
- Software selectable frequency range: 8 MHz to 32 kHz
- Two analog comparators with programmable on-chip voltage reference (CVREF)
- 256 bytes of data EEPROM for non-volatile parameter storage
- nanoWatt Technology for ultra-low power consumption
- Ultra Low-Power Wake-up (ULPW) on pin change
- Enhanced Timer1 with gate sync latch and low-power oscillator option
- Timer0: 8-bit timer/counter with 8-bit programmable prescaler
- Power-on Reset (POR), Power-up Timer (PWRT), Oscillator Start-up Timer (OST)
- Brown-out Reset (BOR) with software selectable trip points
- Enhanced Watchdog Timer (WDT) with on-chip RC oscillator
- In-Circuit Serial Programming (ICSP) via two pins
- High current I/O pins: 25 mA sink/source per pin
- Programmable code protection for program and data memory
Applications
- Industrial sensor interfaces and data acquisition
- Battery-powered monitoring systems and data loggers
- Smart sensors with digital output (I2C/SPI)
- Consumer electronics with analog sensing
- Home automation and environmental monitoring
- Medical devices and health monitors
- Automotive sensor modules