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CY27C128
3
AC Test Loads and Waveforms
C1284
C1285
90%
10%
3.0V
GND
90%
10%
ALL INPUT PULSES
5V
OUTPUT
30 pF
INCLUDING
JIG AND
SCOPE
5V
OUTPUT
5 pF
INCLUDING
JIG AND
SCOPE
(a) Normal Load
(b) High Z Load
< 5 ns
< 5 ns
OUTPUT
R1 250W (329W MIL)
R2 167W
(202W MIL
100W
Equivalent to:
THÉVENIN EQUIVALENT
2.00 V
R2 167W
(202W MIL
R1 250W (329W MIL)
OUTPUT
125W
1.9 V
Commercial
Military
Switching Characteristics Over the Operating Range[4, 7]
27C128-45
27C128-55
27C128-70
27C128-90
Parameter
Description
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
Unit
tAA
Address to Output Valid
45
55
70
90
ns
tHZOE
Outpout Enable Inactive to High Z
15
20
25
25
ns
tOE
Output Enable Active to Output Valid
15
20
25
30
ns
tHZCE
Chip Enable Inactive to High Z
20
25
25
25
ns
tACE
Chip Enable Active to Output Valid
45
55
70
90
ns
tPU
Chip Enable Active to Power Up
0
0
0
0
ns
tPD
Chip Enable Inactive to Power Down
45
55
70
90
ns
tOH
Output Hold from Address Change
0
0
0
0
ns
Switching Characteristics Over the Operating Range[4, 7] (continued)
27C128-120
27C128-150
27C128-200
Parameter
Description
Min.
Max.
Min.
Max.
Min.
Max.
Unit
tAA
Address to Output Valid
120
150
200
ns
tHZOE
Outpout Enable Inactive to High Z
30
30
30
ns
tOE
Output Enable Active to Output Valid
30
40
40
ns
tHZCE
Chip Enable Inactive to High Z
30
30
30
ns
tACE
Chip Enable Active to Output Valid
120
150
200
ns
tPU
Chip Enable Active to Power Up
0
0
0
ns
tPD
Chip Enable Inactive to Power Down
120
150
200
ns
tOH
Output Hold from Address Change
0
0
0
ns
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