m48t35 STMicroelectronics, m48t35 Datasheet - Page 20

• Manufacturer Part Number: m48t35
• Description: 5v, 256 Kbit 32 Kb X 8 Timekeeper Sram
• Manufacturer: STMicroelectronics

Table 10.
1. Valid for Ambient Operating Temperature: T
2. V
3. V
4. t
Table 11.
1. Valid for Ambient Operating Temperature: T
2. All voltages referenced to V
3. CAPHAT and M4T32-BR12SH1 SNAPHAT only, M4T28-BR12SH1 SNAPHAT top t
4. Using larger M4T32-BR12SH6 SNAPHAT top (recommended for Industrial Temperature Range - Grade 6 device).
5. At 25°C, V
20/29
Symbol
t
DR
noted).
V
noted).
V
rec
V
Symbol
t
PFD
CC
PFD
rec
PFD
(3)(5)
SO
t
t
FB
t
t
(min) = 20ms for industrial temperature Grade 6 device.
F
PD
t
RB
(4)(4)
passes V
R
(2)
(min) to V
(max) to V
(3)
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
= 0V.
PFD
SS
E or W at V
V
V
V
V
V
PFD
PFD
PFD
PFD
SS
PFD
(min).
fall time of less than t
(min) fall time of less than t
to V
(min) to V
(max) to V
(min) to V
(max) to Inputs Recognized
PFD
SS
IH
.
(min) V
before Power Down
PFD
SS
Parameter
PFD
V
(max) V
CC
CC
(min) V
FB
Fall Time
Rise Time
may cause corruption of RAM data.
A
A
Parameter
= 0 to 70 or –40 to 85°C; V
= 0 to 70 or –40 to 85°C; V
(1)(2)
CC
CC
F
may result in deselection/write protection not occurring until 200µs after
Rise Time
Fall Time
(1)
M48T35Y
M48T35Y
M48T35
M48T35
Grade 1
Grade 6
CC
CC
M48T35Y
M48T35
= 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
10
10
Min
4.5
4.2
(4)
(5)
DR
= 7 years (typ).
4.35
Typ
4.6
3.0
3.0
Min
300
10
10
10
40
0
1
Max
200
Max
4.75
4.5
YEARS
YEARS
Unit
Unit
ms
µs
µs
µs
µs
µs
µs
V
V
V
V