BQ32002 Series

Real-time clock (RTC) with automatic switchover to backup supply

Catalog

Real-time clock (RTC) with automatic switchover to backup supply

Part	Voltage - Supply [Max]	Voltage - Supply [Min]	Current - Timekeeping (Max)	Supplier Device Package	Mounting Type	Voltage - Supply, Battery [Max]	Voltage - Supply, Battery [Min]	Interface	Operating Temperature [Max]	Operating Temperature [Min]	Package / Case	Package / Case [y]	Package / Case [x]	Type	Time Format
Texas Instruments BQ32002DR	3.6 V	3 V	65 µA	8-SOIC	Surface Mount	3.6 V	1.4 V	2-Wire Serial I2C	85 °C	-40 °C	8-SOIC	3.9 mm	0.154 in	Clock/Calendar	HH:MM:SS (24 hr)

Catalog

Real-time clock (RTC) with automatic switchover to backup supply

Key Features

• Automatic Switchover to Backup SupplyI2C Interface Supports Serial Clockup to 400 kHzUses 32.768-kHz Crystal With–63-ppm to +126-ppm AdjustmentIntegrated Oscillator-Fail Detection8-Pin SOIC Package–40°C to +85°C Ambient OperatingTemperatureAutomatic Switchover to Backup SupplyI2C Interface Supports Serial Clockup to 400 kHzUses 32.768-kHz Crystal With–63-ppm to +126-ppm AdjustmentIntegrated Oscillator-Fail Detection8-Pin SOIC Package–40°C to +85°C Ambient OperatingTemperature

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 non-rechargeable 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. 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 non-rechargeable 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.