5(ꢌꢌEHJLꢌQꢌSRLQWꢌ
7
ꢌ
Hꢌ
ꢌSRLꢌQW
ꢌ
92/
ꢌꢑꢌꢈ[ꢌP9
ꢌꢑꢌ[ꢌP9
ꢌ
977ꢌꢐꢌ[ꢌP
9ꢌ
92/
ꢌ
977ꢌꢐꢌꢈ[ꢌP9ꢌ
7ꢅꢌ 7ꢈꢌ
W+=ꢋW536
7ꢌꢌHQG
ꢌSRLQ
Wꢌꢌ
ꢌꢈꢒ
7ꢅꢐ7ꢈꢌ
W/=ꢋW
535(ꢌEꢌ
Wꢌꢌ
ꢌꢈꢒ7
ꢅꢐ7ꢈꢌ
'46ꢌ
W'+ꢌ
W'6ꢌ
ꢌ
9,ꢌ+ꢎDFꢏꢌꢌPLQ
9,ꢌ+ꢎGFꢏꢌꢌPLQ
95ꢌ ()ꢎGFꢏꢌ
ꢌ
ꢌ
9,ꢌ/ꢎGFꢏꢌꢌPD[
9,ꢌ/ꢎDFꢏꢌꢌPD[
96ꢌ 6ꢌ
ꢌ
ꢌ
W,+ꢌ
W,+
ꢌ
W,6ꢌ
W,6ꢌ
ꢌ
ꢏꢌ
ꢏꢌ
9,ꢌ/ꢎGF ꢌPD[
ꢌ
ꢌ
ꢏꢌ
9,ꢌ/ꢎDF ꢌPD[
ꢏꢌ
Internet Data Sheet
HYB18TC256[80/16]0BF
256-Mbit Double-Data-Rate-Two SDRAM
FIGURE 5
Method for calculating transitions and endpoint
92+
ꢌꢐꢌ[ꢌP9
ꢌ
977ꢌꢑꢌꢈ[ꢌP9ꢌ
977ꢌꢑꢌ[ꢌP9ꢌ
92+
ꢌꢐꢌꢈ[ꢌP9ꢌ
W/=ꢌ
W53
W+=ꢌ
W536 QG
7ꢅꢌ 7ꢈꢌ
HJLQꢌSRLQ
FIGURE 6
Differential input waveform timing - tDS and tDS
'46ꢌ
W'+ꢌ
W'6ꢌ
9'ꢌ '4
FIGURE 7
Differential input waveform timing - tlS and tlH
&.ꢌ
&.ꢌ
9'ꢌ '4
9,ꢌ+ꢎDF ꢌPLQꢌ
9,ꢌ+ꢎGF ꢌPLQꢌ
95ꢌ ()ꢎGFꢏꢌ
96ꢌ 6ꢌ
Rev. 1.3, 2007-05
44
07182006-DD60-22E6
QIMONDA [ QIMONDA AG ]
