m48t35 STMicroelectronics, m48t35 Datasheet - Page 9

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

Figure 5.
Note:
Table 3.
1. Valid for Ambient Operating Temperature: T
2. C
2.2
Symbol
t
t
t
t
GHQZ
ELQX
GLQX
EHQZ
t
t
noted).
t
t
t
AVQV
ELQV
GLQV
AXQX
AVAV
L
= 5pF.
(2)
(2)
(2)
(2)
A0-A14
E
G
DQ0-DQ7
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
If the Address Inputs are changed while E and G remain active, output data will remain valid
for Output Data Hold time (t
Read mode AC waveforms
WRITE Enable (W) = High.
Read mode AC characteristics
Write mode
The M48T35/Y is in the WRITE Mode whenever W and E are low. The start of a WRITE is
referenced from the latter occurring falling edge of W or E. A WRITE is terminated by the
earlier rising edge of W or E. The addresses must be held valid throughout the cycle. E or W
must return high for a minimum of t
prior to the initiation of another READ or WRITE Cycle. Data-in must be valid t
the end of WRITE and remain valid for t
Parameter
tAVQV
tELQX
A
tGLQX
= 0 to 70 or –40 to 85°C; V
tELQV
AXQX
(1)
tGLQV
) but will go indeterminate until the next Address Access.
EHAX
tAVAV
VALID
WHDX
from Chip Enable or t
afterward. G should be kept high during
CC
= 4.75 to 5.5V or 4.5 to 5.5V (except where
VALID
Min
70
10
5
5
M48T35/Y
tGHQZ
WHAX
from WRITE Enable
Max
70
25
70
35
25
tAXQX
tEHQZ
AI00925
DVWH
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
prior to
9/29