PCA1461 Overview
GENERAL DESCRIPTION PCA146x series The PCA146x series devices are CMOS integrated circuits specially suited for battery-operated, quartz-crystal-controlled wrist-watches, with a bipolar stepping motor. VERSION − − − − − − − − − − 1. Figure 1 and Chapter “Package outline” show details of standard package, available for large orders only.
PCA1461 Key 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 ponent required
- Very low current consumption; typically 170 nA
- Output for bipolar stepping motors of different types
- Up to 50% reduction in motor current pared with conventional circuits, by self adaption of the motor pulse width to matc
- 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