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PCA1467

NXP

CMOS

INTEGRATED CIRCUITS DATA SHEET PCA146x series 32 kHz watch circuits with adaptive motor pulse Product specification Sup...


PCA1467

NXP


Octopart Stock #: O-36216

Findchips Stock #: 36216-F

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INTEGRATED CIRCUITS DATA SHEET PCA146x series 32 kHz watch circuits with adaptive motor pulse Product specification Supersedes data of 1998 Mar 18 File under Integrated Circuits, IC16 1998 Apr 21 Philips Semiconductors Product specification 32 kHz watch circuits with adaptive motor pulse FEATURES • 32 kHz oscillator, amplitude regulated with exc
More View ellent 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. ORDERING INFORMATION TYPE NUMBER PCA1461U PCA1461U/10 PCA1462U PCA1462U/7 PCA1462U/10 PCA1463U PCA1463U/10 PCA1465U/10 PCA1465U/7 PCA1467U/10 Note PACKAGE(1) NAME − − − − − − − − − − chip in tray chip on foil chip in tray chip with bumps on tape chip on foil chip in tray chip on foil chip on foil chip with bumps on tape chip on foil DESCRIPTION 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 dimensions and bonding pad locations” shows exact pad locations for other delivery formats. 1998 Apr 21 2 Philips Semiconductors Product specification 32 kHz watch circuits with adaptive motor pulse PINNING SYMBOL VSS TEST OSC IN OSC OUT VDD M1 M2 RESET PIN 1 2 3 4 5 6 7 8 DESCRIPTION ground (0 V) test output oscillator input oscillator output supply voltage motor 1 output motor 2 output reset input VSS TEST OSC IN OSC OUT 1 2 PCA146x series 8 7 RESET M2 M1 V DD PCA146xT 3 4 MSA937 6 5 Fig.1 Pin configuration, PCA146xT, (PMFP8). FUNCTIONAL DESCRIPTION AND TESTING The motor output delivers pulses of six different stages depending on the torque required to turn the motor (Figs. 3 and 4). Every motor pulse is followed by a detection phase which monitors the waveform of the induced motor voltage. When a step is missed a correction sequence will be started (Fig.2). Motor pulses The circuit produces motor pulses of six different stages (stage 1 to 5, stag






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