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BQ32000 Datasheet, PDF (1/20 Pages) Texas Instruments – REAL-TIME CLOCK (RTC)
bq32000
www.ti.com................................................................................................................................................... SLUS900B – DECEMBER 2008 – REVISED JUNE 2009
REAL-TIME CLOCK (RTC)
FEATURES
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• 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
APPLICATIONS
• General consumer electronics
DESCRIPTION
The bq32000 device is a compatible replacement for industry standard real-time clocks.
The bq32000 features an automatic backup supply with integrated trickle charger. The backup supply can be
implemented using a capacitor or non-rechargeable battery. The bq32000 has a programmable calibration
adjustment from –63 ppm to +126 ppm. The bq32000 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 bq32000 includes automatic leap-year compensation.
TA
–40°C to 85°C
SOIC – D
ORDERING INFORMATION(1)
PACKAGE (2)
ORDERABLE PART NUMBER
Reel of 2500
BQ32000DR
TOP-SIDE MARKING
bq32000 xx y zzzz(3)
(1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI
web site at www.ti.com.
(2) Package drawings, thermal data, and symbolization are available at www.ti.com/packaging.
(3) xx = date code, y = assembly site, zzzz = lot code
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008–2009, Texas Instruments Incorporated
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