The PIC16F84A-20/P is a 18 pin dip 1.75KB enhanced flash microcontroller chip.

Features:

• 18 pin DIP package
• Individual pin input/output control
• 256 - 512 memory lines
• 13 I/O pins
• 1-13 outputs
• 1-13 inputs
• No ADC inputs
• 64 Bytes of data memory
• Up to 20MHz operating speed

Datasheet PIC16F84A-20I/P