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CY7C419/21/25/29/33
Document #: 38-06001 Rev. *B
Page 7 of 25
Switching Characteristics Over the Operating Range[7, 8] (continued)
7C419–30
7C421–30
7C424–30
7C425–30
7C429–30
7C433–30
7C419–40
7C420–40
7C421–40
7C424–40
7C425–40
7C429–40
7C432–40
7C433–40
7C420–65
7C421–65
7C424–65
7C425–65
7C428–65
7C429–65
7C433–65
Parameter
Description
Min.
Max.
Min.
Max.
Min.
Max.
Unit
tRC
Read Cycle Time
40
50
80
ns
tA
Access Time
30
40
65
ns
tRR
Read Recovery Time
10
10
15
ns
tPR
Read Pulse Width
30
40
65
ns
tLZR
[6,9]
Read LOW to Low Z
3
3
3
ns
tDVR
[9,10]
Data Valid After Read HIGH
5
5
5
ns
tHZR
[6,9,10]
Read HIGH to High Z
20
20
20
ns
tWC
Write Cycle Time
40
50
80
ns
tPW
Write Pulse Width
30
40
65
ns
tHWZ
[6,9]
Write HIGH to Low Z
5
5
5
ns
tWR
Write Recovery Time
10
10
15
ns
tSD
Data Set-Up Time
18
20
30
ns
tHD
Data Hold Time
0
0
0
ns
tMRSC
MR Cycle Time
40
50
80
ns
tPMR
MR Pulse Width
30
40
65
ns
tRMR
MR Recovery Time
10
10
15
ns
tRPW
Read HIGH to MR HIGH
30
40
65
ns
tWPW
Write HIGH to MR HIGH
30
40
65
ns
tRTC
Retransmit Cycle Time
40
50
80
ns
tPRT
Retransmit Pulse Width
30
40
65
ns
tRTR
Retransmit Recovery Time
10
10
15
ns
tEFL
MR to EF LOW
40
50
80
ns
tHFH
MR to HF HIGH
40
50
80
ns
tFFH
MR to FF HIGH
40
50
80
ns
tREF
Read LOW to EF LOW
30
35
60
ns
tRFF
Read HIGH to FF HIGH
30
35
60
ns
tWEF
Write HIGH to EF HIGH
30
35
60
ns
tWFF
Write LOW to FF LOW
30
35
60
ns
tWHF
Write LOW to HF LOW
30
35
60
ns
tRHF
Read HIGH to HF HIGH
30
35
60
ns
tRAE
Effective Read from Write HIGH
30
35
60
ns
tRPE
Effective Read Pulse Width After EF HIGH
30
40
65
ns
tWAF
Effective Write from Read HIGH
30
35
60
ns
tWPF
Effective Write Pulse Width After FF HIGH
30
40
65
ns
tXOL
Expansion Out LOW Delay from Clock
30
40
65
ns
tXOH
Expansion Out HIGH Delay from Clock
30
40
65
ns
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