Philips Semiconductors
32 kHz watch circuits using a silver-oxide
or a 3 V lithium battery
Product specification
PCA167x series
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX. UNIT
Motor output
Vsat
saturation voltage Σ (P + N)
RL = 2 kΩ;
−
150
200
mV
Tamb = −10 to +60 °C
Rsc
short-circuit resistance Σ (P + N) Itransistor < 1 mA
−
200
300
Ω
tT
cycle time
note 1
tP
pulse width
note 2
Oscillator
VOSC ST
gm
tosc
∆f/f
Ci
Co
starting voltage
transconductance
start-up time
frequency stability
input capacitance
output capacitance
Vi(p-p) = 50 mV
∆VDD = 100 mV
1.2 −
−
V
6
15
−
µS
−
1
−
s
−
0.05 × 10−6 0.3 × 10−6
−
3
−
pF
19
24
29
pF
Reset input
fo
∆Vo
tedge
Iim
Ii(av)
output frequency
output voltage swing
edge time
peak input current
average input current
−
32
−
Hz
R = 1 MΩ; C = 10 pF 1.4 −
−
V
R = 1 MΩ; C = 10 pF −
1
−
µs
note 3
−
320
−
nA
−
10
−
nA
Test mode
tT1
cycle time
tDEB
debounce time
RESET = VDD
−
31.25
−
ms
14.7 −
123.2
ms
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”).
3. Duty factor is 1 : 32 and RESET = VDD or VSS.
1998 Apr 03
5