64 MHz 8-bit PIC with 24-channel ADC — what the specs mean for the BOM
The Microchip PIC18F86K22-I/PTRSL is an 8-bit MCU from the PIC® XLP™ 18K family, built around a PIC core clocked at 64 MHz. It carries 64 KB of program Flash (32K x 16), 4K x 8 of RAM, and 1K x 8 of EEPROM — enough code space and data retention for moderate-complexity control loops, sensor fusion, or human-machine interface tasks in industrial and appliance designs. The 24-channel, 12-bit ADC is a standout peripheral for applications that need to sample multiple analog signals — think temperature, pressure, or current-sense inputs — without adding external muxing. The 80-TQFP (12x12 mm) package gives 69 I/O lines, enough to drive a small TFT display, a keypad matrix, and a handful of serial peripherals simultaneously.
Peripheral set and connectivity — what is on the pins
The PWM channels can drive motor half-bridges or LED dimming directly, though the duty-cycle resolution depends on the timer configuration. It also includes an EBI/EMI interface for connecting external memory or parallel peripherals, which is less common on 8-bit MCUs and can offload data throughput from the core. For timing-critical applications like CAN (not present on this part), an external clock source would still be advisable.