W9725G6KB25I-TR Datasheet, PDF (65/87 Pages) Winbond – 4M X 4 BANKS X 16 BIT DDR2 SDRAM

W9725G6KB
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
tDS tDH
nominal
line
tangent
line
nominal
line
DC to VREF
region
V_SS
ΔTR
ΔTF
Hold Slew Rate ^{tangent line[VREF(dc) - VIL(dc)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: Sep. 03, 2012
Revision A03