PCF1179C Datasheet, PDF (2/20 Pages) NXP Semiconductors – 4-digit duplex LCD car clock

Philips Semiconductors
4-digit duplex LCD car clock
Product specification
PCF1179C
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)
• 4 Hz set mode.
GENERAL DESCRIPTION
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.
ORDERING INFORMATION
TYPE
NUMBER
PCF1179CT
PCF1179CU
PCF1179CU/10
NAME
SO28
−
−
PACKAGE
DESCRIPTION
plastic small outline package; 28 leads; body width 7.5 mm⁽¹⁾
uncased chip in tray⁽²⁾
chip-on-film frame carrier (FFC)⁽²⁾
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.
VERSION
SOT136-1
−
−
1997 Apr 16
2