1997 Dec 12

8

Philips Semiconductors

Product specification

32 kHz watch circuits with EEPROM

PCA16xx series

Notes

1. Cycle time can be changed to one of the following values: 1, 5, 10, 12 or 20 s (see Chapter “Available types”).

2. Pulse width can be varied from 2 ms to 15.7 ms in steps of 1 ms (see Chapter “Available types”).

Motor output

saturation voltage

Σ (P + N)

−

150

200

mV

short-circuit resistance

−

200

300

Ω

cycle time

note 1

pulse width

note 2

Oscillator

starting voltage

1.2

−−

V

transconductance

6

15

−µS

start-up time

−

1

−

s

∆f/f

frequency stability

∆V

−

0.05

×

0.3

×

input capacitance

8

10

12

pF

output capacitance

12

15

18

pF

Voltage level detector

threshold voltage

lithium mode

1.65

1.80

1.95

V

threshold voltage

battery end-of-life

1.27

1.38

1.46

V

∆V

VLD

hysteresis of threshold

−

10

−

mV

temperature coefficient

−−1

−

mV/K

voltage detection cycle

−

60

−

s

Reset input

output frequency

−

32

−

Hz

∆V

o

output voltage swing

R = 1 M

Ω; C=10pF

1.4

−−

V

edge time

R = 1 M

Ω; C=10pF

−

1

−µs

peak input current

note 3

−

320

−

nA

average input current

−

10

−

nA

Test mode

cycle time for motor pulses in:

test 1

−

125

−

ms

test 2

−

31.25

−

ms

test 3

see Chapter “Available types”

debounce time

14.7

−

123.2

ms

Battery end-of-life

end-of-life sequence

−

4

−

s

motor pulse width

see “Available types”

−

−

ms

time between pulses

−

31.25

−

ms

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT