參數(shù)資料
型號: W9425G6EH-5I
廠商: WINBOND ELECTRONICS CORP
元件分類: DRAM
英文描述: 16M X 16 DDR DRAM, 0.7 ns, PDSO66
封裝: 0.400 INCH, ROHS COMPLIANT, TSOP2-66
文件頁數(shù): 25/54頁
文件大?。?/td> 0K
代理商: W9425G6EH-5I
W9425G6EH
Publication Release Date:Dec. 03, 2008
- 31 -
Revision A08
10. SYSTEM CHARACTERISTICS FOR DDR SDRAM
The following specification parameters are required in systems using DDR500, DDR400 & DDR333
devices to ensure proper system performance. These characteristics are for system simulation
purposes and are guaranteed by design.
10.1 Table 1: Input Slew Rate for DQ, DQS, and D M
AC CHARACTERISTICS
DDR500
DDR400
DDR333
PARAMETER
SYMBOL
MIN. MAX.
MIN. MAX. MIN.
MAX.
UNIT NOTES
DQ/DM/DQS input slew rate
measured between VIH(DC),
VIL(DC) and VIL(DC), VIH(DC)
DCSLEW
0.5
4.0
0.5
4.0
0.5
4.0
V/nS
a, m
10.2 Table 2: Input Setup & Hold Time Derating for Slew Rate
INPUT SLEW RATE
ΔtIS
ΔtIH
UNIT
NOTES
0.5 V/nS
0
pS
i
0.4 V/nS
+50
0
pS
i
0.3 V/nS
+100
0
pS
i
10.3 Table 3: Input/Output Setup & Hold Time Derating for Slew Rate
INPUT SLEW RATE
ΔtDS
ΔtDH
UNIT
NOTES
0.5 V/nS
0
pS
k
0.4 V/nS
+75
0
pS
k
0.3 V/nS
+150
0
pS
k
10.4 Table 4: Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate
INPUT SLEW RATE
ΔtDS
ΔtDH
UNIT
NOTES
±0.0 nS/V
0
pS
j
±0.25 nS/V
+50
0
pS
j
±0.5 nS/V
+100
0
pS
j
10.5 Table 5: Output Slew Rate Characteristics (X16 Devices only)
SLEW RATE
CHARACTERISTIC
TYPICAL
RANGE (V/NS)
MINIMUM
(V/NS)
MAXIMUM
(V/NS)
NOTES
Pullup Slew Rate
1.2 ~ 2.5
0.7
5.0
a, c, d, f, g, h
Pulldown Slew Rate
1.2 ~ 2.5
0.7
5.0
b, c, d, f, g, h
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