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PCA1467 Datasheet

32 kHz watch circuits with adaptive motor pulse

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INTEGRATED CIRCUITS
DATA SHEET
PCA146x series
32 kHz watch circuits with adaptive
motor pulse
Product specification
Supersedes data of 1998 Mar 18
File under Integrated Circuits, IC16
1998 Apr 21


NXP Semiconductors Electronic Components Datasheet

PCA1467 Datasheet

32 kHz watch circuits with adaptive motor pulse

No Preview Available !

Philips Semiconductors
32 kHz watch circuits with adaptive motor
pulse
Product specification
PCA146x 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 to match the required torque of the motor
No loss of motor steps possible because of on-chip
detection of the induced motor voltage
Detector for lithium or silver-oxide battery voltage levels
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 PCA146x series devices are CMOS integrated circuits
specially suited for battery-operated,
quartz-crystal-controlled wrist-watches, with a bipolar
stepping motor.
ORDERING INFORMATION
TYPE
NUMBER
PCA1 461U
PCA1 461U/10
PCA1 462U
PCA1 462U/7
PCA1 462U/10
PCA1 463U
PCA1 463U/10
PCA1 465U/10
PCA1 465U/7
PCA1 467U/10
NAME
chip in tray
chip on foil
chip in tray
chip with bumps on tape
chip on foil
chip in tray
chip on foil
chip on foil
chip with bumps on tape
chip on foil
PACKAGE(1)
DESCRIPTION
VERSION
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.
1998 Apr 21
2


Part Number PCA1467
Description 32 kHz watch circuits with adaptive motor pulse
Maker NXP
Total Page 24 Pages
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