Four-Digit Duplex LCD Car Clock

PCF1175_1179 No Longer Manufactured
  • This page contains information on a product that is no longer manufactured (discontinued). Specifications and information herein are available for historical reference only.

The PCF1175C 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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Product Details

Block Diagram

PCF1175C Block Diagram

PCF1175C Block Diagram
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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)
  • 1 Hz set mode.

Target Applications

  • Car radio
  • Car audio systems.

Part numbers include: PCF1175CT, PCF1179CT.

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