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M48T86 데이터시트(PDF) 27 Page - STMicroelectronics

부품명 M48T86
상세설명  5.0 V PC real-time clock
PDF  36 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

M48T86 데이터시트(HTML) 27 Page - STMicroelectronics

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M48T86
DC and AC parameters
27/36
Figure 14.
Power down/up mode AC waveforms
P
AI01646
VCC
E
tF
tR
trec
4.5V
VPFD
VSO
Table 13.
Power down/up mode AC characteristics
Symbol
Parameter(1)
Min
Max
Unit
tF
(2)
VCC fall time
300
µs
tR
VCC rise time
100
µs
trec
VPFD to E high
20
200
ms
1.
Valid for ambient operating temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5V (except where noted).
2.
VCC fall time of less than tF may result in deselection/write protection not occurring until 200µs after VCC passes VPFD.
Table 14.
Power down/up trip points DC characteristics
Symbol
Parameter(1)(2)
Min
Typ
Max
Unit
VPFD
Power-fail deselect voltage
4.0
4.35
V
VSO
Battery back-up switchover voltage
3.0
V
tDR
(3)
Expected data retention time
10
YEARS
1.
Valid for ambient operating temperature: TA = 0 to 70°C; VCC = 4.5 to 5.5V (except where noted).
2.
All voltages referenced to VSS.
3.
At 25°C, VCC = 0V.



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