BQ32000 Datasheet, PDF (3/20 Pages) Texas Instruments – REAL-TIME CLOCK (RTC)

bq32000
www.ti.com................................................................................................................................................... SLUS900B – DECEMBER 2008 – REVISED JUNE 2009
FUNCTIONAL BLOCK DIAGRAM AND APPLICATION CIRCUIT
V_CC
Use only
super-capacitor
or battery,
not both
Place supply-decoupling
capacitor near supply pin
1 µF
V_CC
V_BACK
0.22 F
OSCI
OSCO
Trickle
Charge
32-kHz
Oscillator
Automatic
Backup
Switch
VCORE
Interrupt
Generator
I2C Register
Interface With
Undervoltage
Lockout
Registers
V_CC
IRQ
4.7 kW 4.7 kW 4.7 kW
SCL
SDA
GND
NOTE: All pullup resistors should be connected to V_CC such that no pullup is applied during backup supply operation.
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Product Folder Link(s): bq32000
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