BQ32000

ACTIVE

Serial RTC with Battery Backup and Trickle Charge

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Product details

Parameters

Features 63-ppm to +126-ppm adjustment, Oscillator fail detection, I2C bus interface Rating Catalog Operating temperature range (C) -40 to 85 open-in-new Find other Real-time clocks (RTCs) & timers

Package | Pins | Size

SOIC (D) 8 19 mm² 3.91 x 4.9 open-in-new Find other Real-time clocks (RTCs) & timers

Features

  • 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
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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.

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Technical documentation

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

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Software development

DRIVERS & LIBRARIES Download
Linux Driver for BQ32K
BQ32KSW-LINUX 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

The files associated (...)

Design tools & simulation

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PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
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CAD/CAE symbols

Package Pins Download
SOIC (D) 8 View options

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