W641GG2JB Datasheet, PDF (97/109 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 output driver Pull-Down and Pull-Up IV
characteristics.
7.7.1.2 Programmed Driver IV Characteristics at 40 Ohm
Voltage (V)
Pull-Down Current (mA)
Minimum
Maximum
Pull-Up Current (mA)
Minimum
Maximum
0.1
2.32
3.04
0.2
4.56
5.98
0.3
6.69
8.82
0.4
8.74
11.56
0.5
10.70
14.19
0.6
12.56
16.72
0.7
14.34
19.14
0.8
16.01
21.44
0.9
17.61
23.61
1.0
19.11
26.10
1.1
20.53
28.45
1.2
21.92
30.45
1.3
23.29
32.73
1.4
24.65
34.95
1.5
26.00
37.10
1.6
27.35
39.15
1.7
28.70
41.01
1.8
30.08
42.53
1.9
—
43.71
2.0
—
44.89
-2.44
-4.79
-7.03
-9.18
-11.23
-13.17
-15.01
-16.74
-18.37
-19.90
.21.34
-22.72
-24.07
-25.40
-26.73
-28.06
-29.37
-30.66
—
—
-3.27
-6.42
-9.45
-12.37
-15.17
-17.83
-20.37
-22.78
-25.04
-27.17
-29.17
-31.25
-33.00
-35.00
-37.00
-39.14
-41.25
-43.29
-45.23
-47.07
7.8 Termination current characteristics
7.8.1 Termination IV Characteristic at 60 Ohms
Figure represents the DQ termination Pull-Up IV characteristic under process, voltage and temperature best and worst case
conditions. The actual DQ termination Pull-Up current must lie between these two bounding curves. The value of the external ZQ
resistor is 240 Ω, setting the nominal DQ termination impedance to 60 Ω. (Extended Mode Register programmed to ZQ/4).
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Publication Release Date: Apr, 22, 2011
Revision A01-002