K4T56163QI Datasheet, PDF (23/42 Pages) Samsung semiconductor – 256Mb I-die DDR2 SDRAM Specification

K4T56163QI
DDR2 SDRAM
DQS
DQS
V_DDQ
tDS tDH
tDS tDH
V_IH(ac) min
VREF to ac
region
V_IH(dc) min
V_REF(dc)
V_IL(dc) max
nominal slew
rate
V_IL(ac) max
V_SS
tVAC
nominal
slew rate
VREF to ac
region
∆TF
Setup Slew Rate= ^{VREF(dc) - Vil(ac)max}
Falling Signal
∆TF
∆TR
Setup Slew Rate ^{Vih(ac)min - V}REF(dc)
Rising Signal ⁼
∆TR
Figure 5 - IIIustration of nominal slew rate for tDS (differential DQS,DQS)
23 of 42
Rev. 1.0 October 2007