CY7C419/21/25/29/33
Switching Characteristics Over the Operating Range[7, 8] (continued)
7C419–30
7C419–40
7C420–40
7C421–40
7C424–40
7C425–40
7C420–65
7C421–65
7C424–65
7C425–65
7C428–65
7C429–65
7C421–30
7C424–30
7C425–30
7C429–30
7C433–30
7C429–40
7C432–40
7C433–40
7C433–65
Parameter
tRC
Description
Read Cycle Time
Min.
Max.
Min.
Max.
Min.
Max.
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
40
50
80
tA
Access Time
30
40
65
20
tRR
tPR
tLZR
Read Recovery Time
10
30
3
10
40
3
15
65
3
Read Pulse Width
[6,9]
Read LOW to Low Z
[9,10]
tDVR
tHZR
tWC
Data Valid After Read HIGH
Read HIGH to High Z
Write Cycle Time
5
5
5
[6,9,10]
20
20
40
30
5
50
40
5
80
65
5
tPW
Write Pulse Width
[6,9]
tHWZ
tWR
Write HIGH to Low Z
Write Recovery Time
10
18
0
10
20
0
15
30
0
tSD
Data Set-Up Time
tHD
Data Hold Time
tMRSC
tPMR
tRMR
tRPW
tWPW
tRTC
tPRT
tRTR
tEFL
MR Cycle Time
40
30
10
30
30
40
30
10
50
40
10
40
40
50
40
10
80
65
15
65
65
80
65
15
MR Pulse Width
MR Recovery Time
Read HIGH to MR HIGH
Write HIGH to MR HIGH
Retransmit Cycle Time
Retransmit Pulse Width
Retransmit Recovery Time
MR to EF LOW
40
40
40
30
30
30
30
30
30
30
50
50
50
35
35
35
35
35
35
35
80
80
80
60
60
60
60
60
60
60
tHFH
tFFH
tREF
tRFF
tWEF
tWFF
tWHF
tRHF
tRAE
tRPE
tWAF
tWPF
tXOL
tXOH
MR to HF HIGH
MR to FF HIGH
Read LOW to EF LOW
Read HIGH to FF HIGH
Write HIGH to EF HIGH
Write LOW to FF LOW
Write LOW to HF LOW
Read HIGH to HF HIGH
Effective Read from Write HIGH
Effective Read Pulse Width After EF HIGH
Effective Write from Read HIGH
Effective Write Pulse Width After FF HIGH
Expansion Out LOW Delay from Clock
Expansion Out HIGH Delay from Clock
30
30
40
40
65
65
30
35
60
30
30
40
40
65
65
Document #: 38-06001 Rev. *A
Page 7 of 22
CYPRESS [ CYPRESS ]
