1997 Apr 16

2

Philips Semiconductors

Product specification

PCF1172C

FEATURES

indicators

• 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 PCF1172C is a single chip, 4.19 MHz CMOS clock

circuit indicating hours and minutes. It is designed to drive

indicators.

Two external single-pole, single-throw switches will

accomplish all time setting functions. 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

PCF1172CT

VSO40

SOT158-2

PCF1172CU

−

−