参数资料
型号: HY57V121620T-K
英文描述: x16 SDRAM
中文描述: x16内存
文件页数: 8/13页
文件大小: 61K
代理商: HY57V121620T-K
HY57V281620A
Rev. 1.3/Aug. 01
9
AC CHARACTERISTICS II
Note :
1. A new command can be given tRRC after self refresh exit
Parameter
Symbol
-6
-7
-K
-H
-8
-P
-S
Unit
Note
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
Min
Max
RAS Cycle Time
Operation
tRC
60
-
65
-
60
-
65
-
68
-
70
-
70
-
ns
Auto Refresh
tRRC
60
-
65
-
60
-
65
-
68
-
70
-
70
-
ns
RAS to CAS Delay
tRCD
18
-
20
-
15
-
20
-
20
-
20
-
20
-
ns
RAS Active Time
tRAS
42
100K
45
100K
45
100K
45
100K
48
100K
50
100K
50
100K
ns
RAS Precharge Time
tRP
18
-
20
-
15
-
20
-
20
-
20
-
20
-
ns
RAS to RAS Bank Active Delay
tRRD
12
-
14
-
15
-
15
-
16
-
20
-
20
-
ns
CAS to CAS Delay
tCCD
1
-
1
-
1
-
1
-
1
-
1
-
1
-
CLK
Write Command to Data-In Delay
tWTL
0
-
0
-
0
-
0
-
0
-
0
-
0
-
CLK
Data-In to Precharge Command
tDPL
2
-
2
-
2
-
2
-
1
-
1
-
1
-
CLK
Data-In to Active Command
tDAL
5
-
5
-
4
-
5
-
4
-
3
-
3
-
CLK
DQM to Data-Out Hi-Z
tDQZ
2
-
2
-
2
-
2
-
2
-
2
-
2
-
CLK
DQM to Data-In Mask
tDQM
0
-
0
-
0
-
0
-
0
-
0
-
0
-
CLK
MRS to New Command
tMRD
2
-
2
-
2
-
2
-
2
-
2
-
2
-
CLK
Precharge to Data
Output Hi-Z
CAS Latency = 3
tPROZ3
3
-
3
-
3
-
3
-
3
-
3
-
3
-
CLK
CAS Latency = 2
tPROZ2
2
-
2
-
2
-
2
-
2
-
2
-
2
-
CLK
Power Down Exit Time
tPDE
1
-
1
-
1
-
1
-
1
-
1
-
1
-
CLK
Self Refresh Exit Time
tSRE
1
-
1
-
1
-
1
-
1
-
1
-
1
-
CLK
1
Refresh Time
tREF
-
64
-
64
-
64
-
64
-
64
-
64
-
64
ms
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