HYB18H256321BF QIMONDA [Qimonda AG], HYB18H256321BF Datasheet - Page 30

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

4.9
Figure 17
worst case conditions. The actual ADD/CMD 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 240 Ω. (CKE = 1at the RES transition
during Power-Up for ADD/CMD terminations).
Table 17
characteristic.
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 ADD/CMD termination IV
represents the ADD/CMD termination Pull-Up IV characteristic under process, voltage and temperature best and
Terminator Pull-Up Current (mA)
Minimum
-0.41
-0.80
-1.17
-1.53
-1.87
-2.20
-2.50
-2.79
-3.06
-3.32
Termination IV Characteristic at 240 Ohms
Maximum
-0.55
-1.07
-1.58
-2.06
-2.53
-2.97
-3.40
-3.80
-4.17
-4.53
30
Programmed Terminator Characteristics at 240 Ohm
Voltage (V)
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
240 Ohm Active Termination Characteristic
Terminator Pull-Up Current (mA)
Minimum
-3.56
-3.79
-4.01
-4.23
-4.46
-4.68
-4.90
-5.11
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Internet Data Sheet
HYB18H256321BF
256-Mbit GDDR3
FIGURE 17
Maximum
-4.86
-5.21
-5.50
-5.83
-6.17
-6.52
-6.88
-7.21
-7.54
-7.85
TABLE 17