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M41T11 датащи(PDF) 21 Page - STMicroelectronics

номер детали M41T11
подробное описание детали  Serial Real Time Clock with 56 Bytes of NVRAM
PDF  29 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T11 датащи(HTML) 21 Page - STMicroelectronics

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M41T11
DC and AC parameters
21/29
Figure 15.
Power down/up mode ac Waveforms
Table 9.
Power down/up AC characteristics
Symbol
Parameter(1)(2)
1.
Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.0 to 5.5V (except where noted).
2.
VCC fall time should not exceed 5mV/µs.
Min
Max
Unit
tPD
SCL and SDA at VIH before power down
0
ns
tREC
SCL and SDA at VIH after power up
10
µs
Table 10.
Power down/up trip points DC characteristics
Symbol
Parameter(1) (2)
1.
Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.0 to 5.5V (except where noted).
2.
All voltages referenced to VSS.
Min
Typ
Max(3)
3.
In 3.3V application, if initial battery voltage is
≥ 3.4V, 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.
Unit
VSO
(4)
4.
Switch-over and deselect point.
Battery back-up 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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