PCA1462 - NXP

PCA1462 CMOS

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. Chapter “Chip dim.

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.