Internet Data Sheet
HYB18H512321BF
512-Mbit GDDR3
4.9
Termination IV Characteristic at 240 Ohms
Figure 17 represents the ADD/CMD termination Pull-Up IV characteristic under process, voltage and temperature best and
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).
FIGURE 17
240 Ohm Active Termination Characteristic
ꢇꢈꢅꢀ2KPꢀ7HUPLQDWLRQꢀ&KDUDFWHUVWLFV
ꢀꢆꢀ
ꢀꢆꢁ
ꢂꢆꢀ
ꢂꢆꢁ
ꢃꢆꢀ
ꢀꢆꢀ
ꢇꢂꢆꢀ
ꢇꢃꢆꢀ
ꢇꢄꢆꢀ
ꢇꢅꢆꢀ
ꢇꢁꢆꢀ
ꢇꢈꢆꢀ
ꢇꢊꢆꢀ
ꢇꢉꢆꢀ
9''4ꢀꢃꢀ9RXWꢀꢁ9ꢂ
Table 17 lists the numerical values of the minimum and maximum allowed values of the ADD/CMD termination IV
characteristic.
TABLE 17
Programmed Terminator Characteristics at 240 Ohm
Voltage (V)
Terminator Pull-Up Current (mA)
Voltage (V)
Terminator Pull-Up Current (mA)
Minimum
Maximum
Minimum
Maximum
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
-0.41
-0.80
-1.17
-1.53
-1.87
-2.20
-2.50
-2.79
-3.06
-3.32
-0.55
-1.07
-1.58
-2.06
-2.53
-2.97
-3.40
-3.80
-4.17
-4.53
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
-3.56
-3.79
-4.01
-4.23
-4.46
-4.68
-4.90
-5.11
—
-4.86
-5.21
-5.50
-5.83
-6.17
-6.52
-6.88
-7.21
-7.54
-7.85
—
Rev. 1.3, 2007-12
28
05292007-WAU2-UU95
QIMONDA [ QIMONDA AG ]
