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M41T93 Datasheet(PDF) 39 Page - STMicroelectronics

Part # M41T93
Description  Serial SPI bus RTC with battery switchover
PDF  49 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T93 Datasheet(HTML) 39 Page - STMicroelectronics

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M41T93
DC and AC parameters
39/49
Figure 17.
Power down/up mode AC waveforms
1.
All voltages referenced to VSS.
2.
Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 2.38 to 5.5V (except where noted).
Table 21.
Power down/up trip points DC characteristics
Sym
Parameter(1,2)
Min
Typ
Max
Unit
VRST
Reset threshold voltage
S
2.85
2.93
3.0
V
R
2.55
2.63
2.7
V
Z
2.25
2.32
2.38
V
VSO
Battery back-up switchover
VRST
V
Hysteresis
25
mV
trec
Reset pulse Width (VCC Rising)
140
280
ms
VCC to Reset Delay, VCC = (VRST + 100mV), falling to
(VRST – 100mV; for VCC slew rate of 10mV/µs
2.5
µs
AI11839
VCC
trec
tPD
VSO
SCL
SDI
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