參數(shù)資料
型號(hào): HY5DU28822BLT-X
廠商: Hynix Semiconductor Inc.
英文描述: 128M-S DDR SDRAM
中文描述: 128M的,擰DDR SDRAM內(nèi)存
文件頁(yè)數(shù): 28/33頁(yè)
文件大小: 343K
代理商: HY5DU28822BLT-X
HY5DU28422B(L)T
HY5DU28822B(L)T
Rev. 0.3/May. 02
28
AC CHARACTERISTICS II
(AC operating conditions unless otherwise noted)
<DDR266A/B, DDR200>
Parameter
Symbol
DDR266A
DDR266B
DDR200
Unit
Note
Min
Max
Min
Max
Min
Max
Row Cycle Time
t
RC
65
-
65
-
70
-
ns
Auto Refresh Row Cycle Time
t
RFC
75
-
75
-
80
-
ns
Row Active Time
t
RAS
45
120K
45
120K
50
120k
ns
Active to Read with Auto Precharge Delay
t
RAP
20
-
20
-
20
-
ns
16
Row Address to Column Address Delay
t
RCD
20
-
20
-
20
-
ns
Row Active to Row Active Delay
t
RRD
15
-
15
-
15
-
ns
Column Address to Column Address Delay
t
CCD
1
-
1
-
1
-
CK
Row Precharge Time
t
RP
20
-
20
-
20
-
ns
Write Recovery Time
tWR
15
-
15
-
15
-
ns
Write to Read Command Delay
t
WTR
1
-
1
-
1
-
CK
Auto Precharge Write Recovery +
Precharge Time
t
DAL
(tWR/tCK)
+
(tRP/tCK)
-
(tWR/tCK)
+
(tRP/tCK)
-
(tWR/tCK)
+
(tRP/tCK)
-
CK
15
System Clock Cycle
Time
CL = 2.5
t
CK
7.5
12
7.5
12
8.0
12
ns
CL = 2
7.5
12
10
12
10
12
ns
Clock High Level Width
t
CH
0.45
0.55
0.45
0.55
0.45
0.55
CK
Clock Low Level Width
t
CL
0.45
0.55
0.45
0.55
0.45
0.55
CK
Data-Out edge to Clock edge Skew
t
AC
-0.75
0.75
-0.75
0.75
-0.8
0.8
ns
DQS-Out edge to Clock edge Skew
t
DQSCK
-0.75
0.75
-0.75
0.75
-0.8
0.8
ns
DQS-Out edge to Data-Out edge Skew
t
DQSQ
-
0.5
-
0.5
-
0.6
ns
Data-Out hold time from DQS
t
QH
t
HP
-t
QHS
-
t
HP
-t
QHS
-
t
HP
-t
QHS
-
ns
1, 10
Clock Half Period
t
HP
min
(tCL,tCH)
-
min
(tCL,tCH)
-
min
(tCL,tCH)
-
ns
1,9
Data Hold Skew Factor
t
QHS
-
0.75
-
0.75
-
0.75
ns
10
Valid Data Output Window
t
DV
t
QH
-t
DQSQ
t
QH
-t
DQSQ
t
QH
-t
DQSQ
ns
Data-out high-impedance window from CK,
/CK
t
HZ
-0.75
0.75
-0.75
0.75
-0.8
0.8
ns
17
Data-out low-impedance window from CK
,
/CK
t
LZ
-0.75
0.75
-0.75
0.75
-0.8
0.8
ns
17
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