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M41T56 Datasheet(PDF) 20 Page - STMicroelectronics

Part # M41T56
Description  512 bit 64b x8 Serial Access TIMEKEEPER SRAM
PDF  28 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M41T56 Datasheet(HTML) 20 Page - STMicroelectronics

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DC and AC parameters
M41T56
20/28
Table 9.
Power down/up mode AC characteristics
Symbol
Parameter(1)
1.
Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 4.5 to 5.5V (except where noted).
Min
Max
Unit
tPD
SCL and SDA at VIH before power down
0
ns
tFB
VPFD (min) to VSS VCC fall time
300
µs
tRB
VSS to VPFD (min) VCC rise time
100
µs
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.
All voltages referenced to VSS.
2.
Valid for Ambient Operating Temperature: TA = –40 to 85°C; VCC = 4.5 to 5.5V (except where noted).
Min
Typ
Max
Unit
VPFD
Power-fail deselect voltage
1.2 VBAT
1.25 VBAT
1.285 VBAT
V
VSO
Battery back-up switchover voltage
VBAT
V



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