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AB08X5-RTC 数据表(PDF) 10 Page - Abracon Corporation

部件名 AB08X5-RTC
功能描述  Ultra-low supply current
PDF  33 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
制造商  ABRACON [Abracon Corporation]
网页  https://abracon.com
标志 ABRACON - Abracon Corporation

AB08X5-RTC 数据表(HTML) 10 Page - Abracon Corporation

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AB08X5 Real-Time Clock Family
Date of Issue: October 16, 2014
3.0 x 3.0 mm
Page 10 of 33
Abracon Drawing #453567
Revision: C
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
VBATRST
Falling Battery POR Volt-
age(7)
VBAT Falling
VBAT
Power
->
POR
VCC < VCCSWF
1.1
1.4
V
VBMRG
VBAT
Margin
above
VCC(3)
VBAT Static
VBAT Power
200
mV
VBATESR
VBAT supply series resis-
tance(6)
VBAT Static
VBAT Power
1.0
1.5
k
(1) VCC must be above VCCST to exit the POR state, independent of the VBAT voltage.
(2) Difference between VCCSWR and VCCSWF.
(3) VBAT must be higher than VCC by at least this voltage to ensure the AB08X5 remains in the VBAT Power state.
(4) Maximum VCC falling slew rate to guarantee correct switchover to VBAT Power state. There is no VCC falling slew rate
requirement if switching to the VBAT power source is not required.
(5) VBAT voltage to guarantee correct transition to VBAT Power state when VCC falls.
(6) Total series resistance of the power source attached to the VBAT pin. The optimal value is 1.5k, which may require an
external resistor. VBAT power source ESR + external resistor value = 1.5k

(7) VBATRST is also the static voltage required on VBAT for register data retention.



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