1997 Apr 16 2
Philips Semiconductors Product specification
4-digit duplex LCD car clock PCF1175C
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.
GENERAL DESCRIPTION
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.
ORDERING INFORMATION
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.
TYPE
NUMBER
PACKAGE
NAME DESCRIPTION VERSION
PCF1175CT SO28 plastic small outline package; 28 leads; body width 7.5 mm
(1)
SOT136-1
PCF1175CU − uncased chip in tray
(2)
−
PCF1175CU/10 − chip-on-film frame carrier (FFC)
(2)
−
