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參數資料
| 型號： | KM416S4021B |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | 2M x 16Bit x 2 Banks Synchronous DRAM(2M x 16位 x2組同步動態(tài)RAM) |
| 中文描述： | 200萬× 16 × 2銀行同步DRAM（2米× 16位x2組同步動態(tài)RAM）的 |
| 文件頁數： | 5/8頁 |
| 文件大?。?/td> | 59K |
| 代理商： | KM416S4021B |
KM416S4021B
CMOS SDRAM
REV. 0 Jun. '97
OPERATING AC PARAMETER
(AC operating conditions unless otherwise noted)
Parameter
Symbol
Version
Unit
Note
-7
-8
Row active to row active delay
t
RRD
(min)
14
16
ns
1
RAS to CAS delay
t
RCD
(min)
21
24
ns
1
Row precharge time
t
RP
(min)
21
24
ns
1
Row active time
t
RAS
(min)
48
50
ns
1
t
RAS
(max)
100
us
Row cycle time
t
RC
(min)
70
80
ns
1
Last data in to new col. address delay
t
CDL
(min)
1
CLK
2
Last data in to row precharge
t
RDL
(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
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.
Notes :
Vtt = 0.45 * V
DDQ
50
Output
C
LOAD
= 30pF
Z0 = 50
(Fig. 1) Output load circuit
AC OPERATING TEST CONDITIONS
(V
DD
= 3.3V
±
0.3V, T
A
= 0 to 70
°
C)
Parameter
Value
Unit
Input reference voltage
0.45 * V
DDQ
V
Input signal maximum peak swing
2.0
V
Input signal minimum slew rate
1.0
V/ns
AC input levels (Vih/Vil)
V
REF
+0.4/V
REF
-0.4
V
Input timing measurement reference level
V
REF
V
Output timing measurement reference level
Vtt
V
Output load condition
See Fig. 1
V
REF
= 0.45 * V
DDQ
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