BQ32002 Texas instruments

BQ32002

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BQ32002

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Описание

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.

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

Function	Real-time clock
Iq (typ) (mA)	0.065
Features	63-ppm to ppm adjustment, I2C bus interface, Oscillator fail detection
Rating	Catalog
Operating temperature range (°C)	-40 to 85
Supply voltage (max) (V)	3.6
Supply voltage (min) (V)	3