PCA1462U/F2,026 NXP

INTEGRATED CIRCUITS DATA SHEET PCA146x series 32 kHz watch circuits with adaptive motor pulse 1998 Apr 21 Product specication Supersedes data of 1998 Mar 18 File under Integrated Circuits, IC16Philips Semiconductors Product specication 32 kHz watch circuits with adaptive motor PCA146x series pulse FEATURES GENERAL DESCRIPTION 32 kHz oscillator, amplitude regulated with excellent The PCA146x series devices are CMOS integrated circuits frequency stability specially suited for battery-operated, quartz-crystal-controlled wrist-watches, with a bipolar High immunity of the oscillator to leakage currents stepping motor. 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. ORDERING INFORMATION (1) PACKAGE TYPE NUMBER NAME DESCRIPTION VERSION PCA1461U - chip in tray - PCA1461U/10 - chip on foil - PCA1462U - chip in tray - PCA1462U/7 - chip with bumps on tape - PCA1462U/10 - chip on foil - PCA1463U - chip in tray - PCA1463U/10 - chip on foil - PCA1465U/10 - chip on foil - PCA1465U/7 - chip with bumps on tape - PCA1467U/10 - chip on foil - Note 1. Figure 1 and Chapter Package outline show details of standard package, available for large orders only. Chapter Chip dimensions and bonding pad locations shows exact pad locations for other delivery formats. 1998 Apr 21 2