w9425g6eh Winbond Electronics Corp America, w9425g6eh Datasheet - Page 30

• Manufacturer Part Number: w9425g6eh
• 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 DDR500, 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 (X16 Devices only)
VIL(DC) and VIL(DC), VIH(DC)
measured between VIH(DC),
AC CHARACTERISTICS
DQ/DM/DQS input slew rate
INPUT SLEW RATE
INPUT SLEW RATE
INPUT SLEW RATE
Pulldown Slew Rate
CHARACTERISTIC
±0.25 nS/V
PARAMETER
±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
DCSLEW
SYM.
+100
+150
+100
Δt
Δt
Δt
+50
+75
+50
0
0
0
RANGE (V/NS)
DS
DS
IS
TYPICAL
1.2 ~ 2.5
1.2 ~ 2.5
MIN. MAX.
0.5
DDR500
4.0
- 30 -
Δt
Δt
Δt
MIN. MAX.
0
0
0
0
0.5
0
0
0
0
0
DH
DH
DDR400
IH
MINIMUM
(V/NS)
0.7
0.7
4.0
MIN. MAX.
0.5
DDR333
Publication Release Date:May 07, 2008
UNIT
UNIT
UNIT
pS
pS
pS
pS
pS
pS
pS
pS
pS
4.0
MAXIMUM
(V/NS)
5.0
5.0
MIN. MAX.
0.5
W9425G6EH
DDR266
4.0
a, c, d, f, g, h
b, c, d, f, g, h
NOTES
NOTES
NOTES
Revision A05
UNIT NOTES
NOTES
V/nS
k
k
k
i
i
i
j
j
j
a, m