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| HYB18TC1G800AF Datasheet, PDF (41/54 Pages) Qimonda AG – 1-Gbit DDR2 SDRAM | |||
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Internet Data Sheet
HYB18TC1G[80/16]0AF
1-Gbit DDR2 SDRAM
FIGURE 7
Method for calculating transitions and endpoint
tHZ
tRPST end point
VOH - x mV
VOH - 2x mV
VOL + 2x mV
VOL + x mV
T1 T2
tHZ,tRPST end point = 2*T1-T2
VTT + 2x mV
VTT + x mV
VTT - x mV
VTT - 2x mV
tLZ
tRPRE begin point
T1 T2
tLZ,tRPRE begin point = 2*T1-T2
'46
'46
FIGURE 8
Differential input waveform timing - tDS and tDS
W'6 W'+
W'6 W'+
9' '4
9,+ DF PLQ
9,+ GF PLQ
95 () GF
9,/ GF PD[
9,/ DF PD[
96 6
FIGURE 9
Differential input waveform timing - tlS and tlH
CK
CK
tIS tIH
tIS tIH
VDDQ
VIH(ac) min
VIH(dc) min
VREF(dc)
VIL(dc) max
VIL(ac) max
VSS
Rev. 1.11, 2006-09
41
03292006-PJAE-UQLG
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