W9751G8KB Datasheet, PDF (65/87 Pages) Winbond – 16M x 4 BANKS 꼌 8 BIT DDR2 SDRAM

DQS
DQS
V_DDQ
tDS
tDH
V_IH(ac)min
V_IH(dc)min _{DC to VREF}
region
V_REF(dc)
V_IL(dc)max
tangent
line
V_IL(ac)max
W9751G8KB
tDS tDH
nominal
line
tangent
line
nominal
line
DC to VREF
region
V_SS
ΔTR
ΔTF
Hold Slew Rate ^{tangent line[VREF(dc) - VIL(ac)max]}
Rising Signal ⁼
ΔTR
Hold Slew Rate
Falling Signal
=
tangent
line
[V_IH(dc)min
ΔTF
-
V_REF(dc)]
Figure 27 – Illustration tangent line for tDH (differential DQS, DQS )
- 65 -
Publication Release Date: Feb. 15, 2012
Revision A01