WS128K32XXX Datasheet, PDF (4/9 Pages) White Electronic Designs Corporation – 128Kx32 SRAM MODULE, SMD 5962-93187

White Electronic Designs
WS128K32-XXX
Parameter
Read Cycle
Read Cycle Time
Address Access Time
Output Hold from Address Change
Chip Select Access Time
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
Symbol
tRC
tAA
tOH
tACS
tOE
tCLZ¹
tOLZ¹
tCHZ¹
tOHZ¹
AC CHARACTERISTICS
VCC = 5.0V, GND = 0V, -55°C ≤ TA ≤ +125°C
-70
Min
Max
70
70
3
70
35
3
0
25
25
-85
Min
Max
85
85
3
85
45
3
0
25
25
-100
Min
Max
100
100
3
100
50
3
0
35
35
-120
Min
Max
120
120
3
120
60
3
0
35
35
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
Parameter
Write Cycle
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
Address Hold Time
Output Active from End of Write
Write Enable to Output in High Z
Data Hold Time
Symbol
tWC
tCW
tAW
tDW
tWP
tAS
tAH
tOW¹
tWHZ¹
tDH
1. This parameter is guaranteed by design but not tested.
AC CHARACTERISTICS
VCC = 5.0V, GND = 0V, -55°C ≤ TA ≤ +125°C
-70
Min
Max
70
60
60
30
50
5
5
5
25
0
-85
Min
Max
85
75
75
35
55
5
5
5
25
0
-100
Min
Max
100
80
80
40
70
5
5
5
35
0
-120
Min
Max
120
100
100
50
80
5
5
5
35
0
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Current Source
D.U.T.
C_eff = 50 pf
Current Source
June 2004
Rev. 4
FIGURE. 4 – AC TEST CIRCUIT
AC Test Conditions
I _OL
Parameter
Typ
Unit
Input Pulse Levels
VIL = 0, VIH = 3.0
V
Input Rise and Fall
5
ns
Input and Output Reference Level
1.5
V
V_Z 1.5V
Output Timing Reference Level
1.5
V
(Bipolar Supply)
Notes:
VZ is programmable from -2V to +7V.
IOL & IOH programmable from 0 to 16mA.
Tester Impedance Z0 = 75 ý.
I _OH
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.
4
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