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M48T129Y датащи(PDF) 23 Page - STMicroelectronics

номер детали M48T129Y
подробное описание детали  5.0 or 3.3 V, 1 Mbit (128 Kbit x 8) TIMEKEEPER짰 SRAM
PDF  28 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
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M48T129Y датащи(HTML) 23 Page - STMicroelectronics

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M48T129V, M48T129Y
DC and AC parameters
Doc ID 5710 Rev 4
23/28
Figure 14.
Power down/up mode AC waveforms
Table 11.
Power down/up AC characteristics
Table 12.
Power down/up trip points DC characteristics
Symbol
Parameter(1)
1.
Valid for ambient operating temperature: TA = 0 to 70 °C; VCC = 4.5 to 5.5 V or 3.0 to 3.6 V (except where noted).
Min
Max
Unit
tF
(2)
2.
VPFD (max) to VPFD (min) fall time of less than tF may result in deselection/write protection not occurring until 200 µs after
VCC passes VPFD (min).
VPFD (max) to VPFD (min) VCC fall time
300
µs
tFB
(3)
3.
VPFD (min) to VSS fall time of less than tFB may cause corruption of RAM data.
VPFD (min) to VSS VCC fall time
M48T129Y
10
µs
M48T129V
150
µs
tR
VPFD (min) to VPFD (max) VCC rise time
0
µs
tRB
VSS to VPFD (min) VCC rise time
1
µs
tREC
VPFD (max) to RST high
40
200
ms
AI01805
VCC
INPUTS
OUTPUTS
DON'T CARE
HIGH-Z
tF
tFB
tR
tRB
VALID
VALID
RECOGNIZED
RECOGNIZED
VPFD (max)
VPFD (min)
VSO
tREC
RST
Symbol
Parameter(1)(2)
1.
All voltages referenced to VSS.
2.
Valid for ambient operating temperature: TA = 0 to 70 °C; VCC = 4.5 to 5.5 V or 3.0 to 3.6 V (except where noted).
Min
Typ
Max
Unit
VPFD
Power-fail deselect voltage
M48T129Y
4.2
4.35
4.5
V
M48T129V
2.7
2.9
3.0
V
VSO
Battery backup switchover voltage
M48T129Y
3.0
V
M48T129V
VPFD –100mV
tDR
(3)
3.
At 25 °C; VCC = 0 V.
Expected data retention time
10
YEARS



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