This data sheet provides the features, specifications, and pin diagrams for the PIC16C641, PIC16C642, PIC16C661, and PIC16C662.
The Microchip PIC16C64X and PIC16C66X series are 8‑bit EPROM‑based microcontrollers with analog comparators, offering up to 33 I/O pins, multiple oscillator options, and low‑power operation. The datasheet provides a complete description of the device varieties, architecture, memory organization, peripheral modules, and special CPU features.
Key sections include a general description, detailed electrical specifications, packaging information, and development support tools such as MPLAB, PICSTART, and PRO MATE programmers. Appendices cover enhancements, compatibility, and a product identification system for ordering the correct part numbers.
| Operating speed (clock input) | 20 MHz |
|---|---|
| Instruction cycle time | 200 ns |
| RAM size (PIC16C641 / PIC16C642) | 128 bytes / 176 bytes |
| RAM size (PIC16C661 / PIC16C662) | 128 bytes / 176 bytes |
| Maximum I/O pins | 33 pins |
| Analog comparators | Two |
| Voltage reference | Programmable on‑chip VREF |
The devices support a 20 MHz clock input.
The PIC16C662 provides up to 33 I/O pins.