精品国产99久久久久久www_亚洲精彩视频在线观看的_性欧美婬妇ⅹxxx视频_里番肉工口全彩老师_a天堂最新在线观看_精品国产在天天在线观看_免费看那种视频_樱桃电视剧全集播放_成人性视频免费看的鲁片_中国伦理影院

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.

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.