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HY5PS56421LF-E3 Datasheet, PDF (30/35 Pages) Hynix Semiconductor – 256Mb DDR2 SDRAM
Fig. -d Illustration of tangent line for tIH , tDH
HY5PS56421(L)F
HY5PS56821(L)F
HY5PS561621(L)F
CK, DQS
CK, DQS
VDDQ
VIH(ac)min
VIH(dc)min
tIS, tIH,
tDS
tDH
VREF(dc)
VIL(dc)max
dc to VREF
region
Tangent
line
tIS, tIH,
tDS tDH
tangent
line
nominal
line
nominal
line
VIL(ac)max
Vss
Delta TR
Delta TF
Hold Slew Rate
Rising Signal
=
Tangent line[VREF(dc)-VIL(ac)max]
Delta TR
Hold Slew Rate
Falling Signal
= Tangent line[VIH(ac)min-VREF(dc)]
Delta TF
Rev 1.0 / July. 2004
30