HY57V643220C
AC CHARACTERISTICS II
(AC operating conditions unless otherwise noted)
-47
Parameter
Symbol
Min
Operation
RAS cycle time
Auto Refresh
RAS to CAS delay
RAS active time
RAS precharge time
RAS to RAS bank active delay
CAS to CAS delay
Write command to data-in delay
Data-in to precharge command
Data-in to active command
DQM to data-out Hi-Z
DQM to data-in mask
MRS to new command
Precharge to
data output Hi-Z
tRRC
tRCD
tRAS
tRP
tRRD
tCCD
tWTL
tDPL
tDAL
tDQZ
tDQM
tMRD
51.7
14.1
37.6
14.1
2
1
0
1
4
2
0
2
3
-
1
1
-
-
-
100K
-
-
-
-
-
-
-
-
-
-
-
-
-
64
55
15
38.7
15
2
1
0
1
4
2
0
2
3
2
1
1
-
-
-
100
K
-
-
-
-
-
-
-
-
-
-
-
-
-
64
55
16.5
38.7
16.5
2
1
0
1
4
2
0
2
3
2
1
1
-
-
-
100
K
-
-
-
-
-
-
-
-
-
-
-
-
-
64
60
18
42
18
2
1
0
1
4
2
0
2
3
2
1
1
-
-
-
100
K
-
-
-
-
-
-
-
-
-
-
-
-
-
64
63
20
42
20
2
1
0
1
4
2
0
2
3
2
1
1
-
-
-
100
K
-
-
-
-
-
-
-
-
-
-
-
-
-
64
64
20
48
20
2
1
0
1
4
2
0
2
3
2
1
1
-
-
-
100
K
-
-
-
-
-
-
-
-
-
-
-
-
-
64
70
20
50
20
2
1
0
1
4
2
0
2
3
2
1
1
-
-
-
100
K
-
-
-
-
-
-
-
-
-
-
-
-
-
64
70
20
50
20
2
1
0
1
4
2
0
2
3
2
1
1
-
-
-
100
K
-
-
-
-
-
-
-
-
-
-
-
-
-
64
ns
ns
ns
ns
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
CLK
ms
1
tRC
51.7
Max
-
Min
55
Max
-
Min
55
Max
-
Min
60
Max
-
Min
63
Max
-
Min
64
Max
-
Min
70
Max
-
Min
70
Max
-
ns
-5
-55
-6
-7
-8
-P
-S
Unit
Note
CAS Latency = 3 tPROZ3
CAS Latency = 2 tPROZ2
tPDE
tSRE
tREF
Power down exit time
Self refresh exit time
Refresh Time
Note :
1. A new command can be given tRRC after self refresh exit
Rev. 0.8/Aug. 02
8
HYNIX [ HYNIX SEMICONDUCTOR ]
