m48t37v STMicroelectronics, m48t37v Datasheet - Page 9

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

Note:
providing that the E and Output Enable (G) access times are also satisfied. If the E and G
access times are not met, valid data will be available after the latter of the Chip Enable
Access time (t
The state of the eight three-state Data I/O signals is controlled by E and G. If the outputs are
activated before t
If the Address Inputs are changed while E and G remain active, output data will remain valid
for Output Data Hold time (t
Figure 4.
WRITE Enable (W) = High.
Table 3.
1. Valid for Ambient Operating Temperature: T
2. C
Symbol
t
t
t
t
GHQZ
GLQX
EHQZ
ELQX
t
t
t
t
A0-A14
E
G
DQ0-DQ7
(except where noted).
t
GLQV
AXQX
AVQV
ELQV
AVAV
L
= 5pF.
(2)
(2)
(2)
(2)
READ Cycle Time
Address Valid to Output Valid
Chip Enable Low to Output Valid
Output Enable Low to Output Valid
Chip Enable Low to Output Transition
Output Enable Low to Output Transition
Chip Enable High to Output Hi-Z
Output Enable High to Output Hi-Z
Address Transition to Output Transition
Read mode AC waveforms
Read mode AC characteristics
ELQV
AVQV
) or Output Enable Access time (t
, the data lines will be driven to an indeterminate state until t
Parameter
AXQX
tAVQV
tELQX
) but will be indeterminate until the next Address Access.
tGLQX
tELQV
(1)
tGLQV
A
= 0 to 70°C or –40 to 85°C; V
tAVAV
VALID
Min
70
10
GLQV
5
5
M48T37Y
–70
).
VALID
Max
70
70
25
35
25
CC
= 4.5 to 5.5V or 3.0 to 3.6V
tGHQZ
Min
100
10
10
5
M48T37V
–100
Max
100
100
50
50
40
tAXQX
tEHQZ
AVQV
AI00925
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
.
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