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參數(shù)資料
| 型號： | M391T2953BG0-CC |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | TVS UNIDIRECT 1500W 160V SMC |
| 中文描述： | 無緩沖DDR2的內(nèi)存模塊 |
| 文件頁數(shù)： | 19/23頁 |
| 文件大?。?/td> | 367K |
| 代理商： | M391T2953BG0-CC |
Rev. 1.2 Jan. 2005
256MB,512MB,1GB Unbuffered DIMMs
DDR2 SDRAM
Parameter
Symbol
DDR2-533
DDR2-400
Units
Notes
min
max
min
max
Write recovery time
tWR
15
x
15
x
ns
Auto precharge write
recovery + precharge time
tDAL
tWR+tRP
x
tWR+tRP
x
tCK
Internal write to read
command delay
tWTR
7.5
x
10
x
ns
Internal read to precharge
command delay
tRTP
7.5
7.5
ns
Exit self refresh to a non-
read command
tXSNR
tRFC + 10
tRFC + 10
ns
Exit self refresh to a read
command
tXSRD
200
200
tCK
Exit precharge power down
to any non-read command
tXP
2
x
2
x
tCK
Exit active power down to
read command
tXARD
2
x
2
x
tCK
Exit active power down to
read command
(Slow exit, Lower power)
tXARDS
6 - AL
6 - AL
tCK
CKE minimum pulse width
(high and low pulse width)
t
CKE
3
3
tCK
ODT turn-on delay
t
AOND
2
2
2
2
tCK
ODT turn-on
t
AON
tAC(min)
tAC(max)
+1
tAC(min)
tAC(max)+
1
ns
ODT turn-on(Power-Down
mode)
t
AONPD
tAC(min)+
2
2tCK+tAC
(max)+1
tAC(min)+
2
2tCK+tAC
(max)+1
ns
ODT turn-off delay
t
AOFD
2.5
2.5
2.5
2.5
tCK
ODT turn-off
t
AOF
tAC(min)
tAC(max)+
0.6
tAC(min)
tAC(max)+
0.6
ns
ODT turn-off (Power-Down
mode)
t
AOFPD
tAC(min)+
2
2.5tCK+
tAC(max)
+1
tAC(min)+
2
2.5tCK+
tAC(max)+
1
ns
ODT to power down entry
latency
tANPD
3
3
tCK
ODT power down exit
latency
tAXPD
8
8
tCK
OCD drive mode output
delay
tOIT
0
12
0
12
ns
Minimum time clocks
remains ON after CKE
asynchronously drops LOW
tDelay
tIS+tCK
+tIH
tIS+tCK
+tIH
ns
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