7C187-15 データシートの表示（PDF） - Cypress Semiconductor
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7C187-15 Datasheet PDF : 9 Pages
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CY7C187
Switching Characteristics Over the Operating Range[6] (continued)
Parameters
Description
READ CYCLE
tRC
tAA
tOHA
tACE
tLZCE
tHZCE
tPU
tPD
WRITE CYCLE[9]
Read Cycle Time
Address to Data Valid
Output Hold from Address Change
CE LOW to Data Valid
CE LOW to Low Z[7]
CE HIGH to High Z[7, 8]
CE LOW to Power Up
CE HIGH to Power Down
tWC
tSCE
tAW
tHA
tSA
tPWE
tSD
tHD
tLZWE
tHZWE
Write Cycle Time
CE LOW 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 HIGH to Low
WE LOW to High Z[8]
7C187-25
Min. Max.
25
25
5
25
5
10
0
20
20
20
20
0
0
15
10
0
5
7
7C187-35
Min. Max.
35
35
5
35
5
15
0
20
25
25
25
0
0
20
15
0
5
10
Switching Waveforms
Read Cycle No. 1[10, 11]
tRC
ADDRESS
DATA OUT
tAA
tOHA
PREVIOUS DATA VALID
DATA VALID
Notes:
10. WE is HIGH for read cycle.
11. Device is continuously selected, CE = VIL.
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
C187–6
Document #: 38-05044 Rev. **
Page 4 of 9
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