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參數(shù)資料
| 型號： | PCA1677U |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 時鐘及定時 |
| 英文描述： | 32 kHz watch circuits using a silver-oxide or a 3 V lithium battery |
| 中文描述： | STEPPING MOTOR WATCH, UUC8 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大?。?/td> | 69K |
| 代理商： | PCA1677U |
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
The motor output pulse widths (t
P
) and the cycle times (t
T
)
are given in Chapter “Available types”.
Power-on reset
For correct operation of the Power-on reset the rise time of
V
DD
from 0 V to 1.55 V should be less than 0.1 ms.
All resettable flip-flops are reset. Additionally the polarity of
the first motor pulse is positive: V
M1
V
M2
≥
0 V.
Customer testing and stop mode
An output frequency of 32 Hz is provided at RESET (pin 8)
to be used for exact frequency measurement.
Connecting the RESET to V
DD
stops the motor pulses
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
mechanical shock to the watch (t
DEB
= 14.7 to 123.2 ms).
Connecting RESET to V
SS
activates the test mode.
The motor pulse period is 31.25 ms instead of t
T
. Test and
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
FORMAT
(1)
PERIOD
t
T
(s)
SPECIFICATIONS
PULSE
WIDTH t
P
(ms)
DRIVE
(%)
EEPROM
BATTERY
EOL
DETECTION
REMARKS
1672
1673
1675
1676
1677
U
U
U
1
1
7.8
5.8
5.8
5.8
7.8
56
56
100
56
100
no
no
no
no
no
no
no
no
no
no
3 V Lithium
3 V Lithium
no oscillator
3 V Lithium
1.5 V
1/16
10
10
U/10
U
Fig.2 Motor output waveform (normal operation).
MSA977
VM1 - M2
2tT
tT
tP
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