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參數(shù)資料
| 型號： | PCA1487 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 32 kHz watch circuits with adaptive motor pulse |
| 中文描述： | 32千赫的自適應(yīng)電機脈沖手表電路 |
| 文件頁數(shù)： | 2/20頁 |
| 文件大?。?/td> | 118K |
| 代理商： | PCA1487 |
1998 Apr 21
2
Philips Semiconductors
Product specification
32 kHz watch circuits with adaptive motor
pulse
PCA148x series
FEATURES
32 kHz oscillator, amplitude regulated with excellent
frequency stability
High immunity of the oscillator to leakage currents
Time calibration electrically programmable and
reprogrammable (via EEPROM)
A quartz crystal is the only external component required
Very low current consumption; typically 170 nA
Output for bipolar stepping motors of different types
Up to 50% reduction in motor current compared with
conventional circuits, by self adaption of the motor pulse
width in accordance with the required torque of the
motor
No loss of motor steps possible because of on-chip
detection of the induced motor voltage
Indication for battery end-of-life
Stop function for accurate timing
Power-on reset for fast testing
Various test modes for testing the mechanical parts of
the watch and the IC.
GENERAL DESCRIPTION
The PCA148x series devices are CMOS integrated circuits
specially suited for battery-operated,
quartz-crystal-controlled wrist-watches, with a bipolar
stepping motor.
ORDERING INFORMATION
Note
1.
Figure 1 and Chapter “Package outline” show details of standard package, available for large orders only.
Chapter “Chip dimensions and bonding pad locations” shows exact pad locations for other delivery formats.
TYPE
NUMBER
PACKAGE
(1)
NAME
DESCRIPTION
VERSION
PCA1485U/7
PCA1486U/7
PCA1486U/10
PCA1487U/10
chip with bumps on tape
chip with bumps on tape
chip on foil
chip on foil
PINNING
SYMBOL
PIN
DESCRIPTION
V
SS
TEST
OSC IN
OSC OUT
V
DD
M1
M2
RESET
1
2
3
4
5
6
7
8
ground (0 V)
test output
oscillator input
oscillator output
supply voltage
motor 1 output
motor 2 output
reset input
Fig.1 Pin configuration, PCA148xT, (PMFP8).
1
2
3
4
8
7
6
5
PCA148xT
VSS
TEST
OSC IN
OSC OUT
RESET
M2
M1
VDD
MSA968
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PCA1487U/10 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:32 kHz watch circuits with adaptive motor pulse |
| PCA148XSERIES | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Watch Circuit |
| PCA1532P | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CLOCK CIRCUIT|CMOS|DIP|8PIN |
| PCA1532T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CLOCK CIRCUIT|CMOS|FP|8PIN |
| PCA1534T | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CLOCK CIRCUIT|CMOS|FP|8PIN |
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