SRAM AC Characteristics
(VCC = 5.0V, VSS= 0V, Tc= -55°C to +125°C)
Read Cycle
Parameter
–025
–035
Symbol
Units
Min Max
25
Min Max
tRC
tAA
tACE
tOH
35
35
35
0
ns
ns
ns
ns
ns
ns
ns
ns
ns
Read Cycle Time
25
25
Address Access Time
Chip Select Access Time
0
Output Hold from Address Change
Output Enable to Output Valid
Chip Select to Output in Low Z *
Output Enable to Output in Low Z *
Chip Deselect to Output in High Z *
Output Disable to Output in High Z *
* Parameters guaranteed by design but not tested
tOE
12
25
tCLZ
tOLZ
tCHZ
tOHZ
2
0
4
0
12
12
15
15
Write Cycle
Parameter
–025
–035
Symbol
Units
Min Max
Min Max
tWC
tCW
tAW
tDW
tWP
tAS
25
17
17
13
17
2
35
25
25
20
25
2
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Write Cycle Time
Chip Select to End of Write
Address Valid to End of Write
Data Valid to End of Write
Write Pulse Width
Address Setup Time
tOW
tWHZ
tDH
4
4
Output Active from End of Write *
Write to Output in High Z *
Data Hold from Write Time
Address Hold Time
13
15
0
0
tAH
0
0
* Parameters guaranteed by design but not tested
Truth Table
Mode
Standby
Read
SCE
OE
X
SWE
Data I/O
Power
H
L
L
L
X
H
H
L
High Z
Data Out
High Z
Standby
Active
Active
Active
L
Output Disable
Write
H
X
Data In
3
Aeroflex Circuit Technology
SCD1663 REV A 4/28/98 Plainview NY (516) 694-6700
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
