WMS128K8-XXX
AC CHARACTERISTICS
(VCC = 5.0V, GND = 0V, TA = -55°C to +125°C)
Parameter
Read Cycle
Symbol
-15
-17
-20
-25
-35
-45
-55
Units
Min Max Min Max Min
Max Min
Max Min
Max
Min
Max Min Max
Read Cycle Time
tRC
tAA
15
0
17
0
20
0
25
35
45
55
ns
ns
ns
ns
ns
ns
ns
ns
ns
Address Access Time
15
17
20
25
35
45
55
Output Hold from Address Change
Chip Select Access Time
tOH
0
0
0
0
tACS
tOE
15
10
17
10
20
12
3
25
15
3
35
20
45
25
55
30
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
tCLZ1
tOLZ1
tCHZ1
tOHZ1
3
0
3
0
3
0
3
0
3
0
0
0
10
10
10
10
10
10
12
12
20
20
20
20
20
20
1. This parameter is guaranteed by design but not tested.
AC CHARACTERISTICS
(VCC = 5.0V, GND = 0V, TA = -55°C to +125°C)
Parameter
Symbol
-15
-17
-20
-25
-35
Min
-45
-55
Units
Write Cycle
Min Max Min Max
Min Max Min
Max
Max Min
Max Min Max
Write Cycle Time
tWC
tCW
tAW
tDW
tWP
tAS
15
14
14
10
14
0
17
14
15
10
14
0
20
15
15
12
15
0
25
20
20
15
20
0
35
25
25
20
25
0
45
55
45
45
25
45
0
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
30
30
25
30
Address Setup Time
Address Hold Time
0
tAH
0
0
0
0
0
0
0
Output Active from End of Write
Write Enable to Output in High Z
Data Hold Time
tOW1
tWHZ1
tDH
3
3
3
3
4
4
4
10
10
12
15
20
25
25
0
0
0
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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