PCA2002USLASHAA datasheet(9/20 Pages) PHILIPS

9 / 20 page

2004 Jan 20

Philips Semiconductors

Product speciﬁcation

32 kHz watch circuit with programmable

output period and pulse width

PCA2002

Frequency tuning at assembled watch

Figure 10 shows the test set-up for frequency tuning the assembled watch.

handbook, full pagewidth

MGW568

FREQUENCY

COUNTER

PROGRAMMABLE

DC POWER SUPPLY

PC INTERFACE

motor

32 kHz

PCA200x

battery

Fig.10 Frequency tuning the assembled watch.

LIMITING VALUES

In accordance with the Absolute Maximum Rating System (IEC 60134).

Notes

1. When writing to the OTP cells, the supply voltage (VDD) can be raised to a maximum of 12 V for a time period of 1 s.

2. Connecting the battery with reversed polarity does not destroy the circuit, but in this condition a large current flows

which rapidly discharges the battery.

HANDLING

Inputs and outputs are protected against electrostatic discharge in normal handling. However it is good practice to take

normal precautions appropriate to handling MOS devices (see

“Handling MOS devices”).

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

VDD

supply voltage

VSS = 0 V; notes 1 and 2

−1.8

all input voltages

VSS − 0.5

VDD + 0.5

tsc

short-circuit duration time

indeﬁnite

Tamb

ambient temperature

−10

+60

°C

Tstg

storage temperature

−30

+100

°C

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