1998 Apr 03

3

Philips Semiconductors

Product specification

32 kHz watch circuits using a silver-oxide

or a 3 V lithium battery

PCA167x series

FUNCTIONAL DESCRIPTION AND TESTING

Motor pulse

are given in Chapter “Available types”.

Power-on reset

For correct operation of the Power-on reset the rise time of

All resettable flip-flops are reset. Additionally the polarity of

Customer testing and stop mode

An output frequency of 32 Hz is provided at RESET (pin 8)

to be used for exact frequency measurement.

leaving them in a HIGH impedance 3-state condition and a

32 Hz signal is produced at the TEST pin. A debounce

circuit protects against accidental stoppages due to

stop mode are disabled by disconnecting RESET

(open-circuit).

AVAILABLE TYPES

Refer to Fig.2 and to Chapters “Ordering information” and “Functional description and testing”.

Note

1. U = Chip in trays; U/10 = chip on foil.

SHORT

TYPE

NUMBER

DELIVERY

PERIOD

(s)

SPECIFICATIONS

PULSE

(ms)

DRIVE

(%)

EEPROM

BATTERY

EOL

DETECTION

REMARKS

1672

U

1

7.8

56

no

no

3 V Lithium

1673

U

1

5.8

56

no

no

3 V Lithium

1675

U

1/16

5.8

100

no

no

no oscillator

1676

U/10

10

5.8

56

no

no

3 V Lithium

1677

U

10

7.8

100

no

no

1.5 V

Fig.2 Motor output waveform (normal operation).

MSA977

VM1 - M2

2t T

t T

t P