The PCF1179C is a single chip, 4.19 MHz CMOS car clock circuit providing hours, minutes and seconds functions. It is designed to drive a 4-digit duplex liquid crystal display (LCD).

Two external single-pole, single-throw switches will accomplish all time setting functions. Time calibration and voltage regulator are electrically programmable via an on-chip EEPROM. The circuit is battery-operated via an internal voltage regulator and an external resistor.

Features and Benefits

Internal voltage regulator is electrically programmable for various LCD voltages Time calibration is electrically programmable (no trimming capacitor required) LCD voltage adjusts with temperature for good contrast 4.19 MHz oscillator 12-hour or 24-hour mode Operating ambient temperature: -40 to +85 °C 28-lead plastic SMD (SO28) 4 Hz set mode.