Microchip datasheet for the PIC12C67x series, small 8-pin EPROM/OTP microcontrollers with analog-to-digital conversion, in a 1.90 MB PDF. Multiple family members are covered, so check the variant and package table against the marking on the chip. The document lists pin functions, internal oscillator calibration, ADC configuration, memory map and electrical characteristics. Technicians use it to identify the few pins of these tiny controllers in chargers, sensors and small appliances and to verify supply and clock behaviour on a suspect board.
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