“PCF1179C是一款单芯片，4.19 MHz的CMOS汽车时钟电路，具有时，分和秒功能。它可以驱动一个4位数的双面液晶显示器（LCD）。其两个外部单刀单掷开关，可以完成所有的时间设定功能。通过片上EEPROM，其时间校准，和电压调节器是电可编程的。该电路通过一个内部稳压器和一个外部电阻电池供电。
”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.
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