The PIC16F631/677/685/687/689/690 family are 20‑pin 8‑bit CMOS flash microcontrollers with a high‑performance RISC CPU, multiple power‑saving modes, and a rich set of peripherals including ADC, comparators, timers, and enhanced USART.
The document includes detailed pin‑out diagrams, pin‑summary tables for each device variant, electrical specifications, and information on code‑protection, temperature ranges, and global sales and service locations. This manual is written in Chinese.
| Package pins | 20 pins (PDIP, SOIC, SSOP) |
|---|---|
| CPU architecture | 8‑bit RISC CPU, 35 instructions |
| Clock speed | Up to 20 MHz oscillator |
| Flash write endurance | 100,000 cycles |
| EEPROM write endurance | 1,000,000 cycles |
| Data retention | > 40 years |
| Standby current (2.0 V) | Typical 50 nA |
| Operating temperature (industrial) | -40 °C to +85 °C |
| Operating temperature (extended) | -40 °C to +125 °C |
The devices are available in 20‑pin PDIP, SOIC, and SSOP packages.