Datasheet

M48T37Y, M48T37V Operation modes
Doc ID 7019 Rev 9 9/30
met, valid data will be available after the latter of the chip enable access time (t
ELQV
) or
output enable access time (t
GLQV
).
The state of the eight three-state data I/O signals is controlled by E
and G. If the outputs are
activated before t
AVQV
, the data lines will be driven to an indeterminate state until t
AVQV
.
If the address inputs are changed while E
and G remain active, output data will remain valid
for output data hold time (t
AXQX
) but will be indeterminate until the next address access.
Figure 4. READ mode AC waveforms
Note: WRITE enable (W
) = high.
AI00925
tAVAV
tAVQV tAXQX
tELQV
tELQX
tEHQZ
tGLQV
tGLQX
tGHQZ
VALID
A0-A14
E
G
DQ0-DQ7
VALID
Table 3. READ mode AC characteristics
Symbol Parameter
(1)
1. Valid for ambient operating temperature: T
A
= 0 to 70 °C or –40 to 85 °C; V
CC
= 4.5 to 5.5 V or 3.0 to 3.6 V
(except where noted).
M48T37Y M48T37V
Unit–70 –100
Min Max Min Max
t
AVAV
READ cycle time 70 100 ns
t
AVQV
Address valid to output valid 70 100 ns
t
ELQV
Chip enable low to output valid 70 100 ns
t
GLQV
Output enable low to output valid 35 50 ns
t
ELQX
(2)
2. C
L
= 5 pF.
Chip enable low to output transition 5 10 ns
t
GLQX
(2)
Output enable low to output transition 5 5 ns
t
EHQZ
(2)
Chip enable high to output Hi-Z 25 50 ns
t
GHQZ
(2)
Output enable high to output Hi-Z 25 40 ns
t
AXQX
Address transition to output transition 10 10 ns