PCF1178C
Overview
- 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. ORDERING INFORMATION PACKAGE TYPE NUMBER NAME PCF1178CT PCF1178CU PCF1178CU/10 PCF1178CU/5 Notes
- See Fig.1 and Chapter “Package outline” for pin layout and package details.
- See Chapter “Chip dimensions and bonding pad locations” for pad layout and package details. SO28 - - - uncased chip in unsawn wafer(2) tray(2) (FFC)(2) DESCRIPTION plastic small outline package; 28 leads; body width 7.5 mm(1) chip-on-film frame carrier GENERAL DESCRIPTION PCF1178C The PCF1178C 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.
