W641GG2JB Datasheet, PDF (100/109 Pages) Winbond – 1-Gbit GDDR3 Graphics SDRAM

W641GG2JB
1-Gbit GDDR3 Graphics SDRAM
Table lists the numerical values of the minimum and maximum allowed values of the termination IV characteristic.
7.8.2.2 Programmed Terminator Characteristics of 120 Ohm
Voltage (V)
Terminator Pull-Up Current (mA)
Minimum
Maximum
0.1
-0.81
-1.09
0.2
-1.60
-2.14
0.3
-2.34
-3.15
0.4
-3.06
-4.12
0.5
-3.74
-5.06
0.6
-4.39
-5.94
0.7
-5.00
-6.79
0.8
-5.58
-7.59
0.9
-6.12
-8.35
1.0
-6.63
-9.06
Voltage (V)
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
2.0
Terminator Pull-Up Current (mA)
Minimum
-7.11
-7.57
-8.02
-8.47
-8.91
-9.35
-9.79
-10.22
—
—
Maximum
-9.72
-10.42
-11.00
-11.67
-12.33
-13.05
-13.75
-14.43
-15.08
-15.69
7.8.3 Termination IV Characteristic at 240 Ohms
Figure 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).
7.8.3.1 240 Ohm Active Termination Characteristic
240 Ohm Termination Characteristic
0.0
0.5
1.0
1.5
2.0
0
-1.0
-2.0
-3.0
-4.0
-5.0
-6.0
-7.0
-8.0
VDDQ - V_OUT (V)
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Publication Release Date: Apr, 22, 2011
Revision A01-002