M48T08Y STMICROELECTRONICS [STMicroelectronics], M48T08Y Datasheet - Page 10

• Manufacturer Part Number: M48T08Y
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Table 3.
Note:
Write mode
10/30
Symbol
t
t
t
t
t
t
t
t
t
t
t
E2HQV
E2HQX
E1HQZ
t
E1LQV
E1LQX
E2LQZ
GHQZ
AVQV
GLQV
GLQX
AXQX
AVAV
Read mode AC characteristics
Valid for ambient operating temperature: T
(except where noted).
The M48T08/18/08Y is in the WRITE Mode whenever W, E1, and E2 are active. The start of
a WRITE is referenced from the latter occurring falling edge of W or E1, or the rising edge of
E2. A WRITE is terminated by the earlier rising edge of W or E1, or the falling edge of E2.
The addresses must be held valid throughout the cycle. E1 or W must return high or E2 low
for a minimum of t
the initiation of another READ or WRITE Cycle. Data-in must be valid t
of WRITE and remain valid for t
Cycles to avoid bus contention; however, if the output bus has been activated by a low on
E1 and G and a high on E2, a low on W will disable the outputs t
READ Cycle Time
Address Valid to Output Valid
Chip Enable 1 Low to Output Valid
Chip Enable 2 High to Output Valid
Output Enable Low to Output Valid
Chip Enable 1 Low to Output Transition
Chip Enable 2 High to Output Transition
Output Enable Low to Output Transition
Chip Enable 1 High to Output Hi-Z
Chip Enable 2 Low to Output Hi-Z
Output Enable High to Output Hi-Z
Address Transition to Output Transition
Parameter
E1HAX
or t
(1)
E2LAX
WHDX
from Chip Enable or t
afterward. G should be kept high during WRITE
A
= 0 to 70°C; V
–100/–10 (T08Y)
Min
100
10
10
5
5
M48T08/M48T18/T08Y
WHAX
Max
100
100
100
50
50
50
40
CC
= 4.75 to 5.5V or 4.5 to 5.5V
from WRITE Enable prior to
WLQZ
–150/–15 (T08Y)
Min
150
10
10
5
5
DVWH
after W falls.
prior to the end
Max
150
150
150
75
75
75
60
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns