CY7C188
AC Test Loads and Waveforms
[5, 6]
R1 481
Ω
5V
OUTPUT
30 pF
INCLUDING
JIGAND
SCOPE
Equivalent to:
R2
255
Ω
5V
OUTPUT
5 pF
INCLUDING
JIGAND
SCOPE
R2
255
Ω
3.0V
10%
GND
R1 481
Ω
ALLINPUTPULSES
90%
90%
10%
≤
3 ns
≤
3 ns
C188–4
(a)
167
Ω
(b)
C188–3
THÉ VENIN EQUIVALENT
1.73V
OUTPUT
Switching Characteristics
Over the Operating Range
[2, 5]
7C188–15
Parameter
READ CYCLE
t
RC
t
AA
t
OHA
t
ACE
t
DOE
t
LZOE
t
HZOE
t
LZCE
t
HZCE
t
PU
t
PD
t
WC
t
SCE
t
AW
t
HA
t
SA
t
PWE
t
SD
t
HD
t
HZWE
t
LZWE
Read Cycle Time
Address to Data Valid
Data Hold from Address Change
CE
1
LOW or CE
2
HIGH to Data Valid
OE LOW to Data Valid
OE LOW to Low Z
[7]
OE HIGH to High Z
[6,7]
CE
1
LOW or CE
2
HIGH to Low Z
[7]
CE
1
HIGH or CE
2
LOW to High Z
[6, 7]
CE
1
LOW or CE
2
HIGH to Power-Up
CE
1
HIGH or CE
2
LOW to Power-Down
Write Cycle Time
CE
1
LOW or CE
2
HIGH to Write End
Address Set-Up to Write End
Address Hold from Write End
Address Set-Up to Write Start
WE Pulse Width
Data Set-Up to Write End
Data Hold from Write End
WE LOW to High Z
[6]
WE HIGH to Low Z
[6, 7]
15
10
10
0
0
10
8
0
0
3
7
0
15
20
15
15
0
0
15
10
0
0
3
7
3
7
0
20
25
18
20
0
0
18
10
0
0
3
11
0
7
3
9
0
20
35
22
30
0
0
22
15
0
0
3
15
3
15
7
0
9
3
11
0
20
15
15
3
20
9
3
11
3
15
20
20
3
25
10
3
15
25
25
3
35
16
35
35
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Description
Min.
Max.
7C188–20
Min.
Max.
7C188–25
Min.
Max.
7C188–35
Min.
Max.
Unit
WRITE CYCLE
[8, 9]
Document #: 38-05053 Rev. **
Page 3 of 8
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