W9425G6KH-5-TR Datasheet, PDF (29/52 Pages) Winbond – 4 M 4 BANKS 16 BITS DDR SDRAM

W9425G6KH
11. 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.
11.1 Table 1: Input Slew Rate for DQ, DQS, and DM
AC CHARACTERISTICS
PARAMETER
DQ/DM/DQS input slew rate measured between
VIH(DC), VIL(DC) and VIL(DC), VIH(DC)
SYM.
DCSLEW
DDR400
MIN.
MAX.
0.5
4.0
UNIT NOTES
V/nS
a, m
11.2 Table 2: Input Setup & Hold Time Derating for Slew Rate
INPUT SLEW RATE
ΔtIS
ΔtIH
UNIT
0.5 V/nS
0
0
pS
0.4 V/nS
+50
0
pS
0.3 V/nS
+100
0
pS
NOTES
i
i
i
11.3 Table 3: Input/Output Setup & Hold Time Derating for Slew Rate
INPUT SLEW RATE
0.5 V/nS
0.4 V/nS
0.3 V/nS
ΔtDS
0
+75
+150
ΔtDH
0
0
0
UNIT
pS
pS
pS
NOTES
k
k
k
11.4 Table 4: Input/Output Setup & Hold Derating for Rise/Fall Delta Slew Rate
INPUT SLEW RATE
±0.0 nS/V
±0.25 nS/V
±0.5 nS/V
ΔtDS
0
+50
+100
ΔtDH
0
0
0
UNIT
pS
pS
pS
NOTES
j
j
j
11.5 Table 5: Output Slew Rate Characteristics (x16 Devices only)
SLEW RATE
CHARACTERISTIC
Pullup Slew Rate
Pulldown Slew Rate
TYPICAL
RANGE (V/NS)
1.2 ~ 2.5
1.2 ~ 2.5
MINIMUM
(V/NS)
0.7
0.7
MAXIMUM
(V/NS)
5.0
5.0
NOTES
a, c, d, f, g, h
b, c, d, f, g, h
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Publication Release Date: Nov. 17, 2014
Revision: A02