WS256K32 Ver la hoja de datos (PDF) - Unspecified
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Fabricante
WS256K32 Datasheet PDF : 7 Pages
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WS256K32-XXX
AC CHARACTERISTICS
(VCC = 5.0V, GND = 0V, TA = -55°C to +125°C)
Parameter
Symbol
-20
Read Cycle
Min
Max
Read Cycle Time
tRC
20
Address Access Time
tAA
20
Output Hold from Address Change
tOH
0
Chip Select Access Time
tACS
20
Output Enable to Output Valid
tOE
12
Chip Select to Output in Low Z
tCLZ1
5
Output Enable to Output in Low Z
tOLZ1
0
Chip Disable to Output in High Z
tCHZ1
12
Output Disable to Output in High Z
tOHZ1
12
1. This parameter is guaranteed by design but not tested.
-25
Min
Max
25
25
0
25
15
5
0
15
15
AC CHARACTERISTICS
(VCC = 5.0V, GND = 0V, TA = -55°C to +125°C)
Parameter
Symbol
-20
Write Cycle
Min
Max
Write Cycle Time
tWC
20
Chip Select to End of Write
tCW
17
Address Valid to End of Write
tAW
17
Data Valid to End of Write
tDW
12
Write Pulse Width
tWP
17
Address Setup Time
tAS
0
Address Hold Time
tAH
2
Output Active from End of Write
tOW1
0
Write Enable to Output in High Z
tWHZ1
8
Data Hold Time
tDH
0
1. This parameter is guaranteed by design but not tested.
-25
Min
Max
25
20
20
15
20
0
2
0
10
0
-35
Min
Max
35
35
0
35
20
5
0
20
20
-35
Min
Max
35
25
25
20
25
0
2
0
15
0
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
FIG. 3
AC TEST CIRCUIT
I OL
Current Source
D.U.T.
Ceff = 50 pf
VZ ≈ 1.5V
(Bipolar Supply)
I OH
Current Source
White Electronic Designs Corporation • (602) 437-1520 • www.whiteedc.com
4
AC TEST CONDITIONS
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
Output Timing Reference Level
1.5
V
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.
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