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參數(shù)資料
| 型號(hào)： | K4S640832K |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | 64Mb K-die SDRAM |
| 中文描述： | 64兆的K - SDRAM內(nèi)存芯片 |
| 文件頁數(shù)： | 10/14頁 |
| 文件大?。?/td> | 226K |
| 代理商： | K4S640832K |
K4S640832K
K4S641632K
Synchronous DRAM
Rev. 1.1 February 2006
10 of 14
AC OPERATING TEST CONDITIONS
(V
DD
= 3.3V
±
0.3V, T
A
= 0 to 70
°
C)
Parameter
Value
Unit
AC input levels (Vih/Vil)
2.4/0.4
V
Input timing measurement reference level
1.4
V
Input rise and fall time
tr/tf = 1/1
ns
Output timing measurement reference level
1.4
V
Output load condition
See Fig. 2
3.3V
1200
870
Output
30pF
V
OH
(DC) = 2.4V, I
OH
= -2mA
V
OL
(DC) = 0.4V, I
OL
= 2mA
Vtt = 1.4V
50
Output
30pF
Z0 = 50
(Fig. 2) AC output load circuit
(Fig. 1) DC output load circuit
Notes :
1. The minimum number of clock cycles is determined by dividing the minimum time required with clock cycle time
and then rounding off to the next higher integer.
2. Minimum delay is required to complete write.
3. All parts allow every cycle column address change.
4. In case of row precharge interrupt, auto precharge and read burst stop.
5. In 100MHz and below 100MHz operating conditions, tRDL=1CLK and tDAL=1CLK + 20ns is also supported.
SAMSUNG recommends tRDL=2CLK and tDAL=2CLK + tRP.
6. t
RC
=t
RFC,
t
RDL
= t
WR
.
OPERATING AC PARAMETER
(AC operating conditions unless otherwise noted)
Parameter
Symbol
Version
Unit
Note
50
60
75
Row active to row active delay
t
RRD
(min)
10
12
15
ns
1
RAS to CAS delay
t
RCD
(min)
15
18
20
ns
1
Row precharge time
t
RP
(min)
15
18
20
ns
1
Row active time
t
RAS
(min)
40
42
45
ns
1
t
RAS
(max)
100
us
Row cycle time
t
RC
(min)
55
60
65
ns
1, 6
Last data in to row precharge
t
RDL
(min)
2
CLK
2,5,6
Last data in to Active delay
t
DAL
(min)
2 CLK + tRP
-
5
Last data in to new col. address delay
t
CDL
(min)
1
CLK
2
Last data in to burst stop
t
BDL
(min)
1
CLK
2
Col. address to col. address delay
t
CCD
(min)
1
CLK
3
Number of valid output data
CAS latency = 3
2
ea
4
CAS latency = 2
1
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