Internet Data Sheet
HY[B/I]18T256[40/80/16]0A[C/F](L)
256-Mbit Double-Data-Rate-Two SDRAM
5.6
Overshoot and Undershoot Specification
This chapter contains Overshoot and Undershoot Specification.
TABLE 31
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
0.9
0.9
0.9
0.9
V
Maximum peak amplitude allowed for
undershoot area
0.9
0.9
0.9
0.9
V
Maximum overshoot area above VDD
Maximum undershoot area below VSS
1.33
1.33
1.00
1.00
0.8
0.8
0.66
0.66
V-ns
V-ns
FIGURE 6
AC Overshoot / Undershoot Diagram for Address and Control Pins
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Rev. 1.50, 2007-12
34
03062006-7M17-PXBC
QIMONDA [ QIMONDA AG ]
