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M41T01 датащи(PDF) 20 Page - STMicroelectronics

номер детали M41T01
подробное описание детали  Automatic switchover and deselect circuitry
PDF  24 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T01 датащи(HTML) 20 Page - STMicroelectronics

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DC and AC parameters
M41T01
20/24
DocID025389 Rev 2
Figure 13. Power down/up mode AC waveforms
1. Valid for Ambient Operating Temperature: TA = –40 to 85 °C; VCC = 2.0 to 5.5 V (except where noted).
2. VCC fall time should not exceed 5 mV/μs.
1. Valid for ambient operating temperature: TA = –40 to 85 °C; VCC = 2.0 to 5.5 V (except where noted).
2. All voltages referenced to VSS.
3. In 3.3 V application, if initial battery voltage is
 3.4 V, it may be necessary to reduce battery voltage (i.e.,
through wave soldering the battery) in order to avoid inadvertent switchover/deselection for VCC – 10%
operation.
4. Switchover and deselect point.
Table 8. Power down/up AC characteristics
Symbol
Parameter(1)
Min
Max
Unit
tPD
SCL and SDA at VIH before power-down
0
ns
trec(2)
SCL and SDA at VIH after power-up
10
μs
Table 9. Power down/up trip points DC characteristics
Symbol
Parameter(1,2)
Min
Typ
Max(3)
Unit
Symbol
Parameter(1,2)
Min
Typ
Max(3)
Unit
VSO(4)
Battery backup switchover
voltage
VBAT –
0.80
VBAT –
0.50
VBAT –
0.30
V
AI00596
VCC
trec
tPD
VSO
SDA
SCL
DON'T CARE



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