m48t12 STMicroelectronics, m48t12 Datasheet - Page 20

• Manufacturer Part Number: m48t12
• Description: 5.0v, 16 Kbit 2kb X 8 Timekeeper Sram
• Manufacturer: STMicroelectronics

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Table 10.
1. Valid for Ambient Operating Temperature: T
2. V
3. V
Table 11.
1. All voltages referenced to V
2. Valid for Ambient Operating Temperature: T
3. At 25°C; V
Symbol
Symbol
noted).
until 200µs after V
noted).
t
t
V
t
FB
V
DR
PFD
PFD
t
t
t
F
PD
t
RB
rec
PFD
SO
R
(2)
(3)
(3)
(min) to V
(max) to V
CC
E or W at V
V
V
V
V
E or W at V
Power down/up AC characteristics
Power down/up trip points DC characteristics
Power-fail Deselect Voltage
Battery Back-up Switchover Voltage
Expected Data Retention Time
PFD
PFD
PFD
SS
= 0V.
SS
PFD
to V
(min) to V
(max) to V
(min) to V
CC
fall time of less than t
(min) fall time of less than tF may result in deselection/write protection not occurring
PFD
passes V
IH
IH
(min) V
before Power Up
before Power Down
SS
Parameter
PFD
SS
PFD
.
Parameter
PFD
V
(max) V
CC
CC
(min) V
(min).
Fall Time
Rise Time
FB
(1)(2)
CC
may cause corruption of RAM data.
(1)
CC
A
A
= 0 to 70°C; V
= 0 to 70°C; V
Fall Time
Rise Time
M48T02
M48T12
CC
CC
= 4.75 to 5.5V or 4.5 to 5.5V (except where
= 4.75 to 5.5V or 4.5 to 5.5V (except where
Min
4.5
4.2
10
Min
300
10
1
0
0
2
Typ
4.6
4.3
3.0
Max
Max
4.75
4.5
YEARS
Unit
ms
Unit
µs
µs
µs
µs
µs
V
V
V