PCF1175C

INTEGRATED CIRCUITS DATA SHEET PCF1175C 4-digit duplex LCD car clock Product specification Supersedes data of September 1993 File under Integrated Circuits, IC16 1997 Apr 16 Philips Semiconductors Product specification 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) 1 Hz set mode. ORDERING INFORMATION TYPE NUMBER PCF1175CT PCF1175CU PCF1175CU/10 Notes 1. See Fig.1 and Chapter “Package outline” for pin layout and package details. 2. See Chapter “Chip dimensions and bonding pad locations” for pad layout and package details. PACKAGE NAME SO28 − − uncased chip in tray(2) (FFC)(2) DESCRIPTION plastic small outline package; 28 leads; body width 7.5 mm(1) chip-on-film frame carrier GENERAL DESCRIPTION PCF1175C 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 externa...