20 MHz 8-bit PIC — memory budget and peripheral set
The Microchip PIC16F87-I/P is an 8-bit PIC MCU running at 20 MHz, with 7 KB (4K x 14) Flash program memory, 368 bytes of RAM, and 256 bytes of EEPROM.
18-pin DIP — legacy footprint, through-hole assembly
Housed in an 18-DIP (0.300", 7.62 mm) package with through-hole mounting, the PIC16F87-I/P mates with standard 0.1" pitch sockets or solders directly into a plated-through-hole PCB. The 18-PDIP footprint is a common legacy form factor, still used in industrial control boards, prototyping, and low-volume production where hand-assembly or socketed firmware updates are preferred.