w9425g6eb Winbond Electronics Corp America, w9425g6eb Datasheet - Page 30

• Manufacturer Part Number: w9425g6eb
• Description: 4 M ? 4 Banks ? 16 Bits Ddr Sdram
• Manufacturer: Winbond Electronics Corp America

10. SYSTEM CHARACTERISTICS FOR DDR SDRAM
The following specification parameters are required in systems using 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
10.2 Table 2: Input Setup & Hold Time Derating for Slew Rate
10.3 Table 3: Input/Output Setup & Hold Time Derating for Slew Rate
10.4 Table 4: Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate
10.5 Table 5: Output Slew Rate Characteristics (X16 Devices only)
DQ/DM/DQS input slew rate
INPUT SLEW RATE
INPUT SLEW RATE
INPUT SLEW RATE
measured between V
V
AC CHARACTERISTICS
IL(DC)
Pulldown Slew Rate
CHARACTERISTIC
±0.25 nS/V
±0.0 nS/V
±0.5 nS/V
Pullup Slew Rate
0.5 V/nS
0.4 V/nS
0.3 V/nS
0.5 V/nS
0.4 V/nS
0.3 V/nS
PARAMETER
SLEW RATE
and V
IL(DC)
, V
IH(DC)
IH(DC)
,
+100
+150
+100
Δt
Δt
Δt
+50
+75
+50
DCSLEW
SYMBOL
0
0
0
RANGE (V/nS)
DS
DS
IS
TYPICAL
1.2 ~ 2.5
1.2 ~ 2.5
MIN.
0.5
DDR400
- 30 -
Δt
Δt
Δt
0
0
0
0
0
0
0
0
0
DH
DH
IH
MINIMUM
(V/nS)
MAX.
4.0
0.7
0.7
Publication Release Date:Feb. 12, 2009
MIN.
0.5
DDR333
UNIT
UNIT
UNIT
pS
pS
pS
pS
pS
pS
pS
pS
pS
MAXIMUM
(V/nS)
5.0
5.0
MAX.
4.0
W9425G6EB
UNIT
V/nS
a, c, d, e, f, g
a, c, d, e, f, g
NOTES
NOTES
NOTES
Revision A02
NOTES
h
h
h
j
j
j
i
i
i
NOTES
a, k