CY7C188-25VC データシートの表示（PDF） - Cypress Semiconductor
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CY7C188-25VC Datasheet PDF : 8 Pages
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CY7C188
AC Test Loads and Waveforms[5, 6]
5V
OUTPUT
R1 481Ω
5V
OUTPUT
R1 481Ω
30 pF
INCLUDING
JIGAND
SCOPE
R2
255Ω
(a)
5 pF
R2
255Ω
INCLUDING
JIGAND
SCOPE (b)
C188–3
Equivalent to: THÉ VENIN EQUIVALENT
OUTPUT
167Ω
1.73V
3.0V
10%
GND
≤ 3 ns
ALLINPUTPULSES
90%
90%
10%
≤ 3 ns
C188–4
Switching Characteristics Over the Operating Range[2, 5]
Parameter
Description
READ CYCLE
tRC
Read Cycle Time
tAA
Address to Data Valid
tOHA
Data Hold from Address Change
tACE
CE1 LOW or CE2 HIGH to Data Valid
tDOE
tLZOE
tHZOE
tLZCE
tHZCE
OE LOW to Data Valid
OE LOW to Low Z[7]
OE HIGH to High Z[6,7]
CE1 LOW or CE2 HIGH to Low Z[7]
CE1 HIGH or CE2 LOW to High Z[6, 7]
tPU
CE1 LOW or CE2 HIGH to Power-Up
tPD
CE1 HIGH or CE2 LOW to Power-Down
WRITE CYCLE[8, 9]
tWC
tSCE
tAW
tHA
tSA
tPWE
tSD
tHD
tHZWE
tLZWE
Write Cycle Time
CE1 LOW or CE2 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]
7C188–15
Min. Max.
15
15
3
15
7
0
7
3
7
0
15
15
10
10
0
0
10
8
0
0
7
3
7C188–20
Min. Max.
20
20
3
20
9
0
9
3
9
0
20
20
15
15
0
0
15
10
0
0
7
3
7C188–25
Min. Max.
25
25
3
25
10
3
11
3
11
0
20
25
18
20
0
0
18
10
0
0
11
3
7C188–35
Min. Max.
35
35
3
35
16
3
15
3
15
0
20
35
22
30
0
0
22
15
0
0
15
3
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Document #: 38-05053 Rev. **
Page 3 of 8
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