CY7C291A
AC Test Loads and Waveforms
5V
OUTPUT
30pF
INCLUDING
JIG AND
SCOPE
R2
167Ω
R1250
Ω
5V
OUTPUT
5 pF
INCLUDING
JIG AND
SCOPE
R2
167Ω
R1250
Ω
3.0V
GND
< 5 ns
ALL INPUT PULSES
90%
10%
90%
10%
< 5 ns
(a) Normal Load
Equivalent to:
THÉ
VENIN EQUIVALENT
100Ω
OUTPUT
(b) High Z Load
2.0V
t
PU
50%
50%
V
CC
SUPPLY
CURRENT
A
0
−
A
10
ADDRESS
CS
2
−
CS
3
CS
1
t
AA
O
0
– O
7
t
PD
t
HZCS
t
ACS
Switching Characteristics
Over the Operating Range
7C291A-20
Parameter
t
AA
t
HZCS1
t
ACS1
t
HZCS2
t
ACS2
t
PU
t
PD
Description
Address to Output Valid
Chip Select Inactive to High Z
Chip Select Active to Output Valid
Chip Select Inactive to High Z
Chip Select Active to Output Valid
Chip Select Active to Power-Up
Chip Select Inactive to Power-Down
0
22
Min.
Max.
20
15
15
22
22
0
27
7C291A-25
Min.
Max.
25
15
15
27
27
0
35
7C291A-35
7C291AL-35
Min.
Max.
35
20
20
35
35
0
45
7C291A-50
Min.
Max.
50
20
20
45
45
Unit
ns
ns
ns
ns
ns
ns
ns
Document #: 38-04011 Rev. *A
Page 5 of 12
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