w9425g6jb Winbond Electronics Corp America, w9425g6jb Datasheet - Page 29

• Manufacturer Part Number: w9425g6jb
• Manufacturer: Winbond Electronics Corp America

10. SYSTEM CHARACTERISTICS FOR DDR SDRAM
The following specification parameters are required in systems using DDR400 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)
INPUT SLEW RATE
INPUT SLEW RATE
INPUT SLEW RATE
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
DQ/DM/DQS input slew rate
measured between V
V
SLEW RATE
AC CHARACTERISTICS
IL(DC)
PARAMETER
and V
IL(DC)
, V
IH(DC)
IH(DC)
+100
+150
+100
Δt
Δt
Δt
+50
+50
+75
0
0
0
RANGE (V/nS)
DS
DS
IS
,
TYPICAL
1.2 ~ 2.5
1.2 ~ 2.5
DCSLEW
SYMBOL
- 29 -
Δt
Δt
Δt
0
0
0
0
0
0
0
0
0
DH
DH
IH
MINIMUM
(V/nS)
0.7
0.7
MIN.
0.5
DDR400
Publication Release Date: Oct. 08, 2010
MAX.
UNIT
UNIT
UNIT
4.0
pS
pS
pS
pS
pS
pS
pS
pS
pS
MAXIMUM
(V/nS)
5.0
5.0
W9425G6JB
UNIT
V/nS
a, c, d, e, f, g
a, c, d, e, f, g
NOTES
NOTES
NOTES
Revision A01
NOTES
h
h
h
NOTES
j
j
j
i
i
i
a, k