W9425G6JH_13 Datasheet, PDF (31/52 Pages) Winbond – 4 M x 4 BANKS x 16 BITS DDR SDRAM

W9425G6JH
11.8 Table 8: Overshoot/Undershoot Specification for Data, Strobe, and Mask Pins
PARAMETER
Maximum peak amplitude allowed for overshoot
Maximum peak amplitude allowed for undershoot
The area between the overshoot signal and VDD must be less than
or equal to Max. area in Figure 4
The area between the undershoot signal and GND must be less than
or equal to Max. area in Figure 4
SPECIFICATION
DDR500
DDR400
1.2 V
1.2 V
1.2 V
1.2 V
2.4 V-nS
2.4 V-nS
2.4 V-nS
2.4 V-nS
VDD
Overshoot
5
4
Max. amplitude = 1.2V
3
2
Max. area
1
0
-1
-2
Max. amplitude = 1.2V
-3
GND
-4
-5
0 0.5 1.0 1.42 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 5.68 6.0 6.5 7.0
Time (nS)
Undershoot
Figure 4: DQ/DM/DQS AC Overshoot and Undershoot Definition
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Publication Release Date: Aug. 27, 2013
Revision A03