32 KHz Watch Circuits with Adaptive Motor Pulse

  • Archived
  • This page contains information on a product that is no longer manufactured (discontinued). Specifications and information herein are available for historical reference only.

Product Details

Block Diagram

PCA1462U, PCA1463U Block Diagram

 PCA1462U, PCA1463U Block Diagram


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 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

Part numbers include: PCA1462U.


Quick reference to our documentation types.

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