Product details

Iq (Typ) (uA) 100 Features 63-ppm to ?ppm adjustment, Oscillator fail detection, I2C bus interface Rating Catalog Operating temperature range (C) -40 to 85 Supply voltage (Max) (V) 3.6 Supply voltage (Min) (V) 3
Iq (Typ) (uA) 100 Features 63-ppm to ?ppm adjustment, Oscillator fail detection, I2C bus interface Rating Catalog Operating temperature range (C) -40 to 85 Supply voltage (Max) (V) 3.6 Supply voltage (Min) (V) 3
SOIC (D) 8 19 mm² 3.91 x 4.9
  • 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
  • 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

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.

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.

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Technical documentation

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Type Title Date
* Data sheet bq32000 Real-Time Clock (RTC) datasheet (Rev. E) 31 Aug 2015
Application note BQ32002 APIs for Tiva 28 Jan 2014

Design & development

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Driver or library

BQ32KSW-LINUX — Linux Driver for BQ32K

The Linux driver supports the BQ32000 Serial RTC. The Linux driver supports communication through the I2C bus and interfaces with the RTC sub-system.
Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:
  • bq32000
Linux Source Files

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