w9425g8eh Winbond Electronics Corp America, w9425g8eh Datasheet - Page 30

• Manufacturer Part Number: w9425g8eh
• Description: 8m ? 4 Banks ? 8 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 & DDR266
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 (X8 Devices only)
DQ/DM/DQS input slew rate
INPUT SLEW RATE
INPUT SLEW RATE
INPUT SLEW RATE
measured between V
V
IL(DC)
AC CHARACTERISTICS
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
SLEW RATE
PARAMETER
and V
IL(DC)
, V
IH(DC)
IH(DC)
,
+100
+150
+100
Δt
Δt
Δt
+50
+75
+50
0
0
0
RANGE (V/NS)
SYMBOL
DCSLEW
DS
DS
IS
TYPICAL
1.2 ~ 2.5
1.2 ~ 2.5
MIN.
0.5
DDR400
- 30 -
Δt
Δt
Δt
MAX. MIN.
0
0
0
0
0
0
0
0
0
4.0
DH
DH
IH
MINIMUM
(V/NS)
1.0
1.0
0.5
DDR333
Publication Release Date: Jul. 04
MAX. MIN.
4.0
UNIT
UNIT
UNIT
pS
pS
pS
pS
pS
pS
pS
pS
pS
MAXIMUM
0.5
(V/NS)
DDR266
4.5
4.5
MAX. UNIT
4.0
V/nS
a, c, d, f, g, h
b, c, d, f, g, h
NOTES
NOTES
NOTES
Revision A01
NOTES
k
k
k
i
i
i
j
j
j
NOTES
a, m
,
2008