m48t37v STMicroelectronics, m48t37v Datasheet - Page 23

• Manufacturer Part Number: m48t37v
• Description: 5.0 Or 3.3v, 256 Kbit 32 Kbit X 8 Timekeeper Sram
• Manufacturer: STMicroelectronics

Table 12.
1. Valid for Ambient Operating Temperature: T
2. V
3. V
4. t
Table 13.
1. Valid for Ambient Operating Temperature: T
2. At 25°C, V
3. Using larger M4T32-BR12SH6 SNAPHAT top (recommended for Industrial Temperature Range - Grade 6 device).
Note:
Symbol
t
noted).
V
noted).
Symbol
REC
t
REC
V
V
DR
PFD
CC
PFD
t
PFD
t
FB
SO
t
F
t
RB
(2)
R
(2)
(4)(4)
passes V
(min) = 20ms for Industrial Temperature Range - Grade 6 device.
(3)
(min) to V
(max) to V
CC
Power-fail Deselect Voltage
Battery Back-up Switchover Voltage
Expected Data Retention Time
Power down/up AC characteristics
Power down/up trip points DC characteristics
All voltages referenced to V
= 0V.
PFD
V
V
V
V
V
SS
PFD
PFD
PFD
SS
PFD
PFD
(min).
fall time of less than t
to V
(min) fall time of less than tF may result in deselection/write protection not occurring until 200µs after
(min) to V
(max) to V
(min) to V
(max) to RST High
PFD
(min) V
PFD
SS
PFD
V
Parameter
(max) V
Parameter
CC
CC
(min) V
FB
Fall Time
Rise Time
may cause corruption of RAM data
A
A
CC
CC
= 0 to 70°C or –40 to 85°C; V
= 0 to 70°C or –40 to 85°C; V
SS
(1)
(1)
Rise Time
Fall Time
.
M48T37Y
M48T37V
M48T37Y
M48T37V
Grade 1
Grade 6
CC
CC
= 4.5 to 5.5V or 3.0 to 3.6V (except where
= 4.5 to 5.5V or 3.0 to 3.6V (except where
10
Min
300
Min
4.2
2.7
10
10
40
1
5
(3)
V
PFD
V
Typ
4.4
2.9
–100mV
BAT
7
Max
200
Max
4.5
3.0
Unit
ms
YEARS
YEARS
µs
µs
µs
µs
Unit
V
V
V
V
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