HYB18H512321AF
512-Mbit GDDR3
Electrical Characteristics
5.9
Termination IV Characteristic at 240 Ohms
Figure 69 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).
240 Ohm Termination Characterstics
0,0
0,5
1,0
1,5
2,0
0,0
-1,0
-2,0
-3,0
-4,0
-5,0
-6,0
-7,0
-8,0
VDDQ - Vout (V)
Figure 69 240 Ohm Active Termination Characteristic
Table 34 lists the numerical values of the minimum and maximum allowed values of the ADD/CMD termination IV
characteristic.
Table 34
Programmed Terminator Characteristic at 240 Ohm
Voltage (V)
Terminator Pull-Up Current
(mA)
Voltage (V)
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
Maximum
-0.55
-1.07
-1.58
-2.06
-2.53
-2.97
-3.40
-3.80
-4.17
-4.53
Minimum
-3.56
-3.79
-4.01
-4.23
-4.46
-4.68
-4.90
-5.11
—
Maximum
-4.86
-5.21
-5.50
-5.83
-6.17
-6.52
-6.88
-7.21
-7.54
-7.85
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
—
Data Sheet
87
Rev. 1.73, 2005-08
05122004-B1L1-JEN8
QIMONDA [ QIMONDA AG ]
