PCF1171CT datasheet(2/16 Pages) PHILIPS

2 / 16 page

1997 Apr 16

Philips Semiconductors

Product speciﬁcation

4-digit LCD car clock

PCF1171C

FEATURES

• Driving standard 31⁄2 or a 4-digit LCD

• Internal voltage regulator for 5 V LCD

• Option for external stabilized voltage supply

• 4.19 MHz oscillator

• Integrated oscillator output capacitor and polarization

resistor

• Operating ambient temperature: −40 to +85 °C

• 40-lead plastic SMD, face down (VSO40).

GENERAL DESCRIPTION

The PCF1171C is a single chip, 4.19 MHz CMOS car clock

circuit indicating hours and minutes. It is designed to drive

a 31

⁄2 or 4-digit liquid crystal display (LCD).

Two external single-pole, single-throw switches will

accomplish all time setting functions. A bonding option

allows the selection of 12-hour or 24-hour display mode.

The circuit is battery-operated via an internal 5 V voltage

regulator or by an external stabilized voltage supply.

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

PCF1171CT

VSO40

plastic very small outline package; 40 leads; face down(1)

SOT158-2

PCF1171CU

−

uncased chip in tray(2)

−

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