This data sheet provides specifications for the 32 kHz PCA167x series of watch circuits, including frequency stability, current consumption, available functions, power-on reset, and more.
This document is a product specification datasheet for the PCA167x series of integrated circuits manufactured by Philips Semiconductors. These devices are designed as 32 kHz watch circuits suitable for battery-operated, quartz-crystal-controlled wrist-watches using bipolar stepping motors.
The datasheet provides comprehensive technical details including features such as a 32 kHz amplitude-regulated oscillator with high immunity to leakage currents and very low current consumption (typically 150 nA). It includes ordering information for various types (PCA1672U through PCA1677U), pin configurations, functional descriptions of motor pulses and test modes, electrical specifications, limiting values, handling precautions, chip dimensions, package outlines, and typical application circuit diagrams.
| Oscillator Frequency | 32 kHz |
|---|---|
| Supply Voltage (Typical) | 1.5 V |
| Supply Current (Typical) | 150 nA |
| Operating Temperature Range | -10 to +60 C |
| Motor Pulse Cycle Time Options | 1, 5, 10, 12 or 20 ms |
The devices are designed for use with a silver-oxide or a 3 V lithium battery.
The device features very low current consumption, typically 150 nA.
Connecting the RESET pin to Vop stops the motor pulses and leaves them in a HIGH impedance 3-state condition.