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HYB18H512321BF Datasheet(PDF) 29 Page - Qimonda AG |
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HYB18H512321BF Datasheet(HTML) 29 Page - Qimonda AG |
29 / 43 page HYB18H512321BF 512-Mbit GDDR3 Internet Data Sheet Rev. 1.1, 2007-09 29 05292007-WAU2-UU95 5.8 Termination IV Characteristic at 120 Ohms Figure 16 represents the DQ or ADD/CMD termination Pull-Up IV characteristic under process, voltage and temperature best and worst case conditions. The actual termination Pull-Up current must lie between these two bounding curves. The value of the external ZQ resistor is 240 Ω, setting the nominal termination impedance to 120 Ω. (Extended Mode Register programmed to ZQ/2 for DQ terminations or CKE = 0 at the RES transition during Power-Up for ADD/CMD terminations). FIGURE 16 120 Ohm Active Termination Characteristic Table 18 lists the numerical values of the minimum and maximum allowed values of the termination IV characteristic. TABLE 18 Programmed Terminator Characteristics of 120 Ohm Voltage (V) Terminator Pull-Up Current (mA) Voltage (V) Terminator Pull-Up Current (mA) Minimum Maximum Minimum Maximum 0.1 -0.81 -1.09 1.1 -7.11 -9.72 0.2 -1.60 -2.14 1.2 -7.57 -10.42 0.3 -2.34 -3.15 1.3 -8.02 -11.00 0.4 -3.06 -4.12 1.4 -8.47 -11.67 0.5 -3.74 -5.06 1.5 -8.91 -12.33 0.6 -4.39 -5.94 1.6 -9.35 -13.05 0.7 -5.00 -6.79 1.7 -9.79 -13.75 0.8 -5.58 -7.59 1.8 -10.22 -14.43 0.9 -6.12 -8.35 1.9 — -15.08 1.0 -6.63 -9.06 2.0 — -15.69 |
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