PCF1179CT - 4-digit duplex LCD car clock

 

 

FEATURES

 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

 

 

GENERAL DESCRIPTION

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.

 

 

 

 

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