SRAM AC Characteristics
(VCC = 5.0V, VSS= 0V, TC = -55°C to +125°C)
Read Cycle
Parameter
–025
–035
Min Max
35
Symbol
Units
Min Max
25
tRC
tAA
tACE
tOH
ns
ns
ns
ns
ns
ns
ns
ns
ns
Read Cycle Time
25
25
35
Address Access Time
35
Chip Select Access Time
0
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
15
20
tCLZ
tOLZ
tCHZ
tOHZ
3
0
3
0
12
12
20
20
Write Cycle
Parameter
–025
–035
Min Max
35
Symbol
Units
Min Max
tWC
tCW
tAW
tDW
tWP
tAS
25
20
20
15
20
0
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Write Cycle Time
25
25
20
25
0
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
0
0
Output Active from End of Write *
Write to Output in High Z *
Data Hold from Write Time
Address Hold Time
10
20
0
0
tAH
0
0
* Parameters guaranteed by design but not tested
SRAM Truth Table
Mode
Standby
Read
SCE
OE
SWE
Data I/O
Power
H
L
L
L
X
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
SCD1677 REV A 4/28/98 Plainview NY (516) 694-6700
AEROFLEX [ AEROFLEX CIRCUIT TECHNOLOGY ]
