64 MHz 8-bit core in a DIP — what this PIC brings to the board
It packs 24 general-purpose I/O lines, an 11-channel 10-bit ADC, and serial connectivity (I²C, SPI, UART/USART) into a 28-pin SPDIP through-hole package.
Memory and peripheral mix — sizing the BOM fit
64 KB of Flash (32K x 16) gives room for moderate-complexity firmware — motor control loops, sensor fusion, or communication stacks. The 1 KB EEPROM is useful for calibration constants and configuration that survive a firmware update — no external serial EEPROM needed for that data. On the peripheral side you get a 10-bit ADC with 11 channels, hardware PWM, brown-out detect, and a watchdog timer — enough to run a closed-loop fan controller, a basic power supply supervisor, or a keypad interface without external glue logic.
Through-hole package — design-in and sourcing angle
The 28-SPDIP (0.300" wide, 7.62 mm pitch) is the through-hole variant. It fits standard 28-pin DIP sockets and breadboards, which makes it a first-choice for development boards, low-volume production, or environments where vibration resistance from a soldered through-hole joint matters. The surface-mount sibling PIC18F26K20-I/SS (SOIC-28) shares the same die and firmware — the only difference is the footprint.