1998 Apr 03

2

Philips Semiconductors

Product specification

32 kHz watch circuits using a silver-oxide

or a 3 V lithium battery

PCA167x series

FEATURES

• 32 kHz oscillator, amplitude regulated with excellent

frequency stability

• High immunity of the oscillator to leakage currents

• Very low current consumption; typically 150 nA

• Stop function for accurate timing

• Chopped motor pulses available

• Power-on reset for fast testing

• Various test modes for testing the mechanical parts of

the watch and the IC.

GENERAL DESCRIPTION

The PCA167x series devices are CMOS integrated circuits

specially suited for battery-operated,

quartz-crystal-controlled wrist-watches, with a bipolar

stepping motor.

ORDERING INFORMATION

Note

1. Figure 1 and Chapter “Package outline” show details of standard package, available for large orders only.

Chapter “Chip dimensions and bonding pad locations” shows exact pad locations for other delivery formats.

TYPE

NUMBER

NAME

DESCRIPTION

VERSION

PCA1672U

−

chip in tray

−

PCA1673U

−

chip in tray

−

PCA1675U

−

chip in tray

−

PCA1676U/10

−

chip on foil

−

PCA1677U

−

chip in tray

−

PINNING

SYMBOL

PIN

DESCRIPTION

1

ground (0 V)

TEST

2

test output

OSC IN

3

oscillator input

OSC OUT

4

oscillator output

5

positive supply voltage

M1

6

motor 1 output

M2

7

motor 2 output

RESET

8

reset input

Fig.1 Pin configuration, PCA167xT, (PMFP8).

1

2

3

4

8

7

6

5

PCA167xT

VSS

TEST

OSC IN

OSC OUT

RESET

M2

M1

VDD

MSA978