Internet Data Sheet
HY[B/I]18T256[40/80/16]0B[C/F](L)
256-Mbit Double-Data-Rate-Two SDRAM
5.6
Overshoot and Undershoot Specification
This chapter contains overshoot and undershoot specification.
TABLE 43
AC Overshoot / Undershoot Specification for Address and Control Pins
Parameter
DDR2-400
DDR2-533
DDR2-667
DDR2-800
Unit
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for undershoot area
Maximum overshoot area above VDD
0.9
0.9
0.9
0.9
V
0.9
0.9
0.9
0.9
V
1.33
1.33
1.00
1.00
0.80
0.80
0.66
0.66
V.ns
V.ns
Maximum undershoot area below VSS
FIGURE 6
AC Overshoot / Undershoot Diagram for Address and Control Pins
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9''
966
8QGHUVKRRWꢌ$UHD
0D[LPXPꢌ$PSOLWXGHꢌꢌ
7LPHꢌꢎQVꢏ
03(7ꢀꢆꢀꢀ
TABLE 44
AC Overshoot / Undershoot Spec. for Clock, Data, Strobe and Mask Pins
Parameter
DDR2-400
DDR2-533
DDR2-667
DDR2-800
Unit
Maximum peak amplitude allowed for overshoot area
Maximum peak amplitude allowed for undershoot area
Maximum overshoot area above VDDQ
0.9
0.9
0.9
0.9
V
0.9
0.9
0.9
0.9
V
0.38
0.38
0.28
0.28
0.23
0.23
0.23
0.23
V.ns
V.ns
Maximum undershoot area below VSSQ
Rev. 1.11, 2007-07
38
11172006-LBIU-F1TN
QIMONDA [ QIMONDA AG ]
