WMS128K8-XXX
AC CHARACTERISTICS
(VCC = 5.0V, TA = -55°C To +125°C)
Parameter
Read Cycle
Symbol
-70
-85
-100
-120
Units
Min
Max
Min
Max
Min
Max
Min
Max
Read Cycle Time
tRC
tAA
70
85
100
120
ns
ns
ns
ns
ns
ns
ns
ns
ns
Address Access Time
70
85
100
120
Output Hold from Address Change
Chip Select Access Time
tOH
3
3
3
3
tACS
70
35
85
45
100
50
120
60
Output Enable to Output Valid
Chip Select to Output in Low Z
Output Enable to Output in Low Z
Chip Disable to Output in High Z
Output Disable to Output in High Z
tOE
tCLZ1
tOLZ1
tCHZ1
tOHZ1
5
5
5
5
5
5
5
5
25
25
25
25
35
35
35
35
1. This parameter is guaranteed by design but not tested.
AC CHARACTERISTICS
(VCC = 5.0V, TA = -55°C To +125°C)
Parameter
Symbol
-70
-85
-100
-120
Units
Write Cycle
Min
70
60
60
30
50
0
Max
Min
85
75
75
35
55
0
Max
Min
100
80
80
40
70
0
Max
Min
120
100
100
50
80
0
Max
Write Cycle Time
tWC
tCW
tAW
tDW
tWP
tAS
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Chip Select to End of Write
Address Valid to End of Write
Data Valid to End of Write
Write Pulse Width
Address Setup Time
Address Hold Time
tAH
5
5
5
5
Output Active from End of Write
Write Enable to Output in High Z
Data Hold Time
tOW1
tWHZ1
tDH
5
5
5
5
25
30
35
35
0
0
0
0
1. This parameter is guaranteed by design but not tested.
AC TEST CIRCUIT
AC TEST CONDITIONS
IOL
Parameter
Typ
Unit
V
Current Source
Input Pulse Levels
VIL = 0, VIH = 3.0
Input Rise and Fall
5
ns
V
Input and Output Reference Level
Output Timing Reference Level
1.5
1.5
D.U.T.
VZ
≈
1.5V
V
(Bipolar Supply)
Ceff = 50 pf
NOTES:
VZ is programmable from -2V to +7V.
IOL & IOH programmable from 0 to 16mA.
Tester Impedance Z0 = 75 Ω.
VZ is typically the midpoint of VOH and VOL.
IOL & IOH are adjusted to simulate a typical resistive load circuit.
ATE tester includes jig capacitance.
IOH
Current Source
3
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