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tRC
Random read or write cycle time
110
ns
Symbol
Parameter
Min
Max
Min
Max
Unit
Note
60ns
70ns
AC CHARACTERISTICS
(TA = 0
°C to 70 °C, VCC = 5V ± 10% , VSS = 0V, unless otherwise noted.)
HY514400B
Read-modify-write cycle time
155
Fast Page mode cycle time
40
Fast Page mode read-modify-write cycle time
80
Access time from /RAS
-
Access time from /CAS
-
Access time from column address
-
Access time from /CAS precharge
-
/CAS to output low impedance
Transition time(rise and fall)
/RAS precharge time
/RAS pulse width
/RAS pulse width(FP mode)
/RAS hold time
/CAS hold time
/CAS pulse width
/RAS to /CAS delay time
/RAS to column address delay time
/CAS to /RAS precharge time
/CAS precharge time
Row address set-up time
Row address hold time
Column address set-up time
Column address hold time
Column address to /RAS lead time
Read command set-up time
Read command hold time referenced to /CAS
tRWC
tPC
tPRWC
tRAC
tCAC
tAA
tCPA
tCLZ
tT
tRP
tRAS
tRASP
tRSH
tCSH
tCAS
tRCD
tRAD
tCRP
tCP
tASR
tRAH
tASC
tCAH
tRAL
tRCS
tRCH
0
3
40
60
60
15
60
15
20
15
5
10
0
10
0
15
30
0
0
-
-
-
-
60
15
30
35
-
50
-
10K
200K
-
-
10K
45
30
-
-
-
-
-
-
-
-
-
130
185
45
95
-
-
-
-
0
3
50
70
70
20
70
20
20
15
5
10
0
10
0
15
35
0
0
-
-
-
-
70
20
35
40
-
50
-
10K
200K
-
-
10K
50
35
-
-
-
-
-
-
-
-
-
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
6
4,9,10
4,9
4,10
4,15
4
3
9
10
15
17
14
14
14
6,14
Read command hold time referenced to /RAS
tRRH
0
-
0
-
ns
6
Write command hold time
Write command pulse width
tWCH
tWP
10
10
-
-
15
15
-
-
ns
ns
14
50ns
90
Min
Max
130
35
75
-
-
-
-
0
3
30
50
50
15
50
15
15
10
5
10
0
8
0
15
25
0
0
-
-
-
-
50
15
25
30
-
50
-
10K
200K
-
-
10K
35
25
-
-
-
-
-
-
-
-
-
0
-
10
10
-
-
Write command hold time from /RAS
tWCR
45
-
55
-
ns
40
-
Column address hold time from /CAS
tAR
50
-
55
-
ns
40
-
Write command to /RAS lead time
tRWL
15
-
20
-
ns
15
-
1Mx4,FP DRAM
Rev.10 / Jan.97
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