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White Electronic Designs Corporation Phoenix AZ (602) 437-1520
White Electronic Designs
WS1M32-XXX
Parameter Symbol -17 -20 -25 Units
Read Cycle Min Max Min Max Min Max
Read Cycle Time tRC 17 20 25 ns
Address Access Time t AA 17 20 25 ns
Output Hold from Address Change tOH 00 0ns
Chip Select Access Time tACS 17 20 25 ns
Output Enable to Output Valid tOE 10 10 12 ns
Chip Select to Output in Low Z t CLZ
1
22 2ns
Output Enable to Output in Low Z tOLZ
1
00 0ns
Chip Disable to Output in High Z tCHZ
1
12 12 12 ns
Output Disable to Output in High Z t
OHZ
1
12 12 12 ns
1. This parameter is guaranteed by design but not tested.
AC CHARACTERISTICS
(V
CC
= 5.0V, GND = 0V, TA = -55°C to +125°C)
NOTES:
V
Z is programmable from -2V to +7V.
I
OL & IOH programmable from 0 to 16mA.
Tester Impedance Z0 = 75W.
V
Z is typically the midpoint of VOH and VOL.
I
OL & IOH
are adjusted to simulate a typical resistive load circuit.
ATE tester includes jig capacitance.
I
Current Source
D.U.T.
C = 50 pf
eff
I
OL
V 1.5V
(Bipolar Supply)
Z
Current Source
OH
AC CHARACTERISTICS
(V
CC
= 5.0V, GND = 0V, TA = -55°C to +125°C)
AC TEST CONDITIONS
Parameter Typ Unit
Input Pulse Levels VIL = 0 , V IH = 3 . 0 V
Input Rise and Fall 5 ns
Input and Output Reference Level 1.5 V
Output Timing Reference Level 1.5 V
Parameter Symbol -17 -20 -25 Units
Write Cycle Min Max Min Max Min Max
Write Cycle Time tWC 17 20 25 ns
Chip Select to End of Write tCW 15 15 17 ns
Address Valid to End of Write tAW 15 15 17 ns
Data Valid to End of Write tDW 11 12 13 ns
Write Pulse Width tWP 15 15 17 ns
Address Setup Time tAS 22 2ns
Address Hold Time tAH 00 0ns
Output Active from End of Write t OW
1
23 4ns
Write Enable to Output in High Z tWHZ
1
91113ns
Data Hold Time t
DH 00 0ns
1. This parameter is guaranteed by design but not tested.
AC TEST CIRCUIT