HYB18TC256160AF_1 Datasheet, PDF (28/55 Pages) Qimonda AG – 256-Mbit Double-Data-Rate-Two SDRAM DDR2 SDRAM

Internet Data Sheet
HYB18TC256160AF
256-Mbit Double-Data-Rate-Two SDRAM
5.6
Overshoot and Undershoot Specification
This chapter contains Overshoot and Undershoot Specification.
TABLE 32
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 V_DD
Maximum undershoot area below V_SS
1.33
1.00
0.80
0.66
V.ns
1.33
1.00
0.80
0.66
V.ns
FIGURE 4
AC Overshoot / Undershoot Diagram for Address and Control Pins
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9ROWV9
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9_''
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TABLE 33
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 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 V_DDQ
Maximum undershoot area below V_SSQ
0.38
0.28
0.23
0.23
V.ns
0.38
0.28
0.23
0.23
V.ns
Rev. 1.20, 2007-04
28
03062006-H3V1-XJT4