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AB1805-T3 Datasheet(PDF) 11 Page - Abracon Corporation |
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AB1805-T3 Datasheet(HTML) 11 Page - Abracon Corporation |
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11 / 37 page  AB18X5 Real-Time Clock with Power Management Family Date of Issue: October 16, 2014 3.0 x 3.0 mm Page 11 of 37 Abracon Drawing #453568 Revision: C 5.2 Power Supply Parameters Figure 3 and Table 5 describe the power supply and switchover parameters. See Power Control and Switching for a detailed description of the operations. Figure 3. Power Supply Switchover For Table 5, T A = -40 °C to 85 °C, TYP values at 25 °C. Table 5: Power Supply and Switchover Parameters SYMBO L PARAMETER PWR TYPE POWER STATE TEST CONDITIONS MIN TYP MAX UNIT VCC System Power Voltage VCC Static VCC Power Clocks operating and RAM and registers retained 1.5 3.6 V VCCIO VCC I/O Interface Voltage VCC Static VCC Power I2C or SPI opera- tion 1.5 3.6 V VCCST VCC Start-up Voltage(1) VCC Rising POR -> VCC Power 1.6 V VCCRST VCC Reset Voltage VCC Falling VCC Power -> POR VBAT < VBAT,MIN or no VBAT 1.3 1.5 V VCCSWR VCC Rising Switch-over Threshold Voltage VCC Rising VBAT Power -> VCC Power VBAT ≥ VBATRST 1.6 1.7 V VCCSWF VCC Falling Switch-over Threshold Voltage VCC Falling VCC Power -> VBAT Power VBAT ≥ VBATSW,MIN 1.2 1.5 V VCCSWH VCC Switchover Thresh- old Hysteresis(2) VCC Hyst. VCC Power <-> VBAT Power 70 mV VCCFS VCC Falling Slew Rate to switch to VBAT state(4) VCC Falling VCC Power -> VBAT Power VCC < VCCSW,MAX 0.7 1.4 V/ms VBAT Battery Voltage VBAT Static VBAT Power Clocks operating and RAM and reg- isters retained 1.4 3.6 V VBATSW Battery Switchover Volt- age Range(5) VBAT Static VCC Power -> VBAT Power 1.6 3.6 V VCC VBAT Power State POR VCCST VCCRST VCC Power VCCST POR VCCSWF VCC Power VBAT Power VBATSW VCCSWR VCC Power VCCSWF VBATRST VBAT Power POR |
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