參數(shù)資料
型號: HYS 72D64020GR
廠商: SIEMENS AG
英文描述: 2.5 V 184-pin Registered DDR-I SDRAM Modules(2.5 V 184腳、512M位寄存型 DDR-I SDRAM 模塊)
中文描述: 2.5伏184針注冊的DDR - 1 SDRAM的模塊(2.5伏184腳,512M的位寄存型的DDR - SDRAM內(nèi)存模塊余)
文件頁數(shù): 12/18頁
文件大?。?/td> 1072K
代理商: HYS 72D64020GR
HYS 72Dxx0x0GR
Registered DDR-I SDRAM-Modules
Target Datasheet
12
4.00
AC Characteristics (for reference only)
(values apply to the SDRAM component and do not include register, PLL, or card wiring)
(
T
A
= 0 to + 70
°
C,
V
DD
= 2.5 V ± 0.2 V)
Parameter
Symbol
-7
PC266A
-7.5
PC266B
-8
PC200
Unit
Notes
min.
max.
min.
max.
min.
max.
DQ Output Access Time from CK/
CK
t
AC
– 0.75
+ 0.75
– 0.75
+ 0.75
– 0.8
+ 0.8
ns
DQS Output access Time from CK/
CK
t
DQSCK
– 0.75
+ 0.75
– 0.75
+ 0.75
– 0.8
+ 0.8
ns
CLK High Level Width
t
CH
t
CL
0.45
0.55
0.45
0.55
0.45
0.55
*tCK
CLK Low Level Width
0.45
0.55
0.45
0.55
0.45
0.55
*tCK
Clock Period
CL = 2
t
CK
7.5
20
10
20
10
20
ns
1)
CL = 2.5
7
20
7.5
20
8
20
ns
CL = 3
7
20
7.5
20
8
20
ns
DQ and DM Input Hold Time
t
DH
0.5
0.5
0.6
ns
DQ and DM Input Setup Time
t
DS
0.5
0.5
0.6
ns
DQ and DM Input Pulse Width
(for each input)
t
DIPW
1.75
1.75
2
ns
Data-Out High-impedance from CK/
CK
t
HZ
– 0.75
+ 0.75
– 0.75
+ 0.75
– 0.8
+ 0.8
ns
Data-Out Low-impedance from CK/
CK
t
LZ
– 0.75
+ 0.75
– 0.75
+ 0.75
– 0.8
+ 0.8
ns
DQS-DQ Skew
t
DQSQ
t
QH
+ 0.5
+ 0.5
+ 0.6
ns
QH Data-Out Hold Time from DQS
tHP-0.75
tHP-0.75
tHP-1.0
ns
2)
Write Command to First DQS
Latching Transition
t
DQSS
0.75
1.25
0.75
1.25
0.75
1.25
*
t
CK
DQS Input Valid Time
t
DSL,H
t
MRD
0.4
0.6
0.4
0.6
0.4
0.6
*
t
CK
Mode Register/Extended Mode
Register Set Cycle Time
15
15
16
ns
Write Preamble Setup Time
t
WPRES
0
0
0
ns
DQS Hold Time from CK/CK
t
WPREH
0.25
0.25
0.25
*
t
CK
Write Postamble
t
WPST
0.4
0.6
0.4
0.6
0.4
0.6
*
t
CK
Input Setup Time (LVTTL inputs)
t
IS
0.9
0.9
1.2
ns
3)
Input Hold Time (LVTTL inputs)
t
IH
0.9
0.9
1.2
ns
3)
Read Preamble
t
RPRE
t
RPST
0.9
1.1
0.9
1.1
0.9
1.1
*
t
CK
Read Postamble
0.4
0.6
0.4
0.6
0.4
0.6
*
t
CK
Row Active Time
t
RAS
t
RC
45
120K
45
120k
50
120K
ns
Row Cycle Time
R/W Operation
65
65
70
ns
Auto Refresh
t
RFC
75
75
80
ns
1)
RAS to CAS Delay
t
RCD
20
20
20
ns
Row Precharge Time
t
RP
20
20
20
ns
Row Activate to Row Activate Delay
t
RRD
15
15
15
ns
Write Recovery Time
t
WR
15
15
15
ns
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