PCA1675 Datasheet | NXP Semiconductors

FEATURES - 32 k Hz oscillator, amplitude regulated with excellent frequency stability - High immunity of the oscillator to leakage currents - Very low current consumption; typically 150 n A - Stop function for accurate timing - Chopped motor pulses available - Power-on reset for fast testing - Various test modes for testing the mechanical parts of the watch and the IC. ORDERING INFORMATION TYPE NUMBER PCA1672U PCA1673U PCA1675U PCA1676U/10 PCA1677U Note PACKAGE(1) NAME - - - - - chip in tray chip in tray chip in tray chip on foil chip in tray DESCRIPTION GENERAL DESCRIPTION PCA167x series The PCA167x 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. 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 positive supply voltage motor 1 output motor 2 output reset input VSS TEST OSC IN OSC OUT 1 2 8 7 RESET M2 M1 V DD PCA167x T 3 4 MSA978 6 5 Fig.1 Pin configuration, PCA167x T, (PMFP8). 1998 Apr 03 Philips Semiconductors Product specification 32 k Hz watch circuits using a silver-oxide or a 3 V lithium battery FUNCTIONAL DESCRIPTION AND TESTING Motor pulse The motor output pulse widths (t P) and the cycle times (t T) are given in Chapter “Available types”. Power-on reset For correct operation of the Power-on reset the rise time of VDD from 0 V to 1.55 V should be less than 0.1 ms. All resettable flip-flops are reset. Additionally the polarity of the first motor pulse is positive: VM1 - VM2 ≥ 0 V. PCA167x series Customer testing and stop mode An output frequency of 32 Hz is provided at RESET (pin 8) to be used for exact frequency...