m48t86 STMicroelectronics, m48t86 Datasheet - Page 27

• Manufacturer Part Number: m48t86
• Description: 5v Pc Real Time Clock
• Manufacturer: STMicroelectronics

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