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FEATURES

APPLICATIONS

DESCRIPTION

bq32000

REAL-TIME CLOCK (RTC)

• General consumer electronics

• Automatic Switchover to Backup Supply

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

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.

ORDERABLE PART NUMBER

TOP-SIDE MARKING

–40°C to 85°C

SOIC – D

Reel of 2500

BQ32000DR

(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.

Copyright © 2008–2009, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.