HYB18H256321BF QIMONDA [Qimonda AG], HYB18H256321BF Datasheet - Page 29

• Manufacturer Part Number: HYB18H256321BF
• Description: 256-Mbit GDDR3 Graphics RAM GDDR3 Graphics RAM
• Manufacturer: QIMONDA [Qimonda AG]

4.8
Figure 16
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).
Table 16
Rev. 0.80, 2007-09
09132007-07EM-7OYI
Voltage (V)
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
lists the numerical values of the minimum and maximum allowed values of the termination IV characteristic.
represents the DQ or ADD/CMD termination Pull-Up IV characteristic under process, voltage and temperature best
Terminator Pull-Up Current (mA)
Minimum
-0.81
-1.60
-2.34
-3.06
-3.74
-4.39
-5.00
-5.58
-6.12
-6.63
Termination IV Characteristic at 120 Ohms
Maximum
-1.09
-2.14
-3.15
-4.12
-5.06
-5.94
-6.79
-7.59
-8.35
-9.06
29
Programmed Terminator Characteristics of 120 Ohm
Voltage (V)
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
120 Ohm Active Termination Characteristic
Terminator Pull-Up Current (mA)
Minimum
-7.11
-7.57
-8.02
-8.47
-8.91
-9.35
-9.79
-10.22
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Internet Data Sheet
HYB18H256321BF
256-Mbit GDDR3
FIGURE 16
Maximum
-9.72
-10.42
-11.00
-11.67
-12.33
-13.05
-13.75
-14.43
-15.08
-15.69
TABLE 16