BQ32002

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community BQ32002 SLUSA96B – AUGUST 2010 – REVISED APRIL 2016 BQ32002 Real-Time Clock (RTC) 1 Features 1 Automatic Switchover to Backup Supply I2C Interface Supports Serial Clock up to 400 kHz Uses 32.768-kHz Crystal With –63-ppm to +126-ppm Adjustment Integrated Oscillator-Fail Detection 8-Pin SOIC Package –40°C to +85°C Ambient Operating Temperature 2 Applications General Consumer Electronics 3 Description The BQ32002 device is a compatible replacement for industry standard real-time clocks. The BQ32002 features an automatic backup supply that can be implemented using a capacitor or nonrechargeable battery. The BQ32002 has a programmable calibration adjustment from –63 ppm to +126 ppm. The BQ32002 registers include an OF (oscillator fail) flag indicating the status of the RTC oscillator, as well as a STOP bit that allows the host processor to disable the oscillator. The time registers are normally updated once per second, and all the registers are updated at the same time to prevent a timekeeping glitch. The BQ32002 includes automatic leap-year compensation. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) BQ32002 SOIC (8) 4.90 mm × 3.91 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Application Circuit VCC Simplified Schematic 3.0 to 3.6 V Place supply-decoupling capacitor near supply pin 1 µF VCC VBACK OSCI Automa...