W9412G6JH
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 DM
AC CHARACTERISTICS
PARAMETER
DDR500
DDR400
DDR333
SYMBOL
UNIT NOTES
MIN. MAX. MIN. MAX. MIN. MAX.
DQ/DM/DQS input slew rate
measured between VIH(DC), DCSLEW
VIL(DC) and VIL(DC), VIH(DC)
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
0.5 V/nS
ΔtIS
0
ΔtIH
0
UNIT
pS
NOTES
i
i
i
0.4 V/nS
+50
+100
0
pS
0.3 V/nS
0
pS
10.3 Table 3: Input/Output Setup & Hold Time Derating for Slew Rate
INPUT SLEW RATE
0.5 V/nS
ΔtDS
0
ΔtDH
UNIT
pS
NOTES
0
0
0
k
k
k
0.4 V/nS
+75
+150
pS
0.3 V/nS
pS
10.4 Table 4: Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate
INPUT SLEW RATE
0.0 nS/V
ΔtDS
0
ΔtDH
UNIT
pS
NOTES
0
0
0
j
j
j
+50
+100
pS
0.25 nS/V
pS
0.5 nS/V
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
1.2 ~ 2.5
0.7
0.7
5.0
5.0
a, c, d, f, g, h
b, c, d, f, g, h
Pulldown Slew Rate
Publication Release Date: Nov. 29, 2011
Revision A03
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