This document is the datasheet of Microchip PIC16F631/677/685/687/689/690, which introduces the characteristics and applications of this series of single-chip microcomputers
This document describes the PIC16F631/677/685/687/689/690 family of 20‑pin 8‑bit CMOS flash microcontrollers, covering their architecture, memory organization, oscillator options, I/O ports, timers, comparators, ADC, communication modules and power characteristics. It includes pin‑out diagrams for PDIP, SOIC, SSOP and QFN packages and lists electrical specifications, operating ranges and packaging details.
The datasheet is organized into sections such as Device Overview, Memory Organization, Oscillator Modes, I/O Ports, Timer Modules, Comparator and ADC modules, Enhanced Capture/Compare/PWM, Enhanced EUSART, SSP, CPU special features, Instruction Set Summary, Development Support, Electrical Characteristics, DC/AC characteristics, Package Information and Appendices (version history, migration notes). This manual is written in Chinese.
| Operating voltage range | 2.0 V – 5.5 V |
|---|---|
| Flash endurance | 100 000 write cycles |
| EEPROM endurance | 1 000 000 write cycles |
| Data retention | > 40 years |
| Standby current (2.0 V) | 50 nA typical |
| Active current (32 kHz, 2.0 V) | 11 µA typical |
| Maximum oscillator frequency | 20 MHz |
| Flash program memory (PIC16F685) | 4 KB |
The devices operate from 2.0 V to 5.5 V.
The flash memory can be written up to 100 000 times.
Typical standby current is 50 nA at 2.0 V.