The PIC16C74BT-20I/L from MICROCHIP TECH. is PIC 16C family 44-Pin PLCC 8-bit CMOS microcontroller. The PIC16C74BT-20I/L microcontroller has 7KB (4K x 14) OTP program memory, 192 x 8 RAM size, 33 I/O general-purpose I/O pins and 8-channel 8-bit analog-to-digital (A/D) converter. This microcontroller operates at a maximum frequency of 20MHz with operating voltage of 4 to 5.5V. Operating temperature range is from -40°C to 85°C.