HYB18H512321BF Datasheet, PDF (26/43 Pages) Qimonda AG – 512-Mbit GDDR3 Graphics RAM

Internet Data Sheet
5.6
Pin Capacitances
HYB18H512321BF
512-Mbit GDDR3
TABLE 15
Pin Capacitances (VDDQ = 1.8 V, TA = 25°C, f = 1 MHz)
Parameter
Symbol
Min.
Max.
Unit
Note
Input capacitance:
CI,CCK
A0-A11, , BA0-2, CKE, CS, CAS, RAS, WE, CKE, RES,CLK,CLK
Input capacitance:
CIO
DQ0-DQ31, RDQS0-RDQS3, WDQS0-WDQS3, DM0-DM3
1.0
2.5
pF
2.0
3.0
pF
5.7
Driver current characteristics
5.7.1
Driver IV characteristics at 40 Ohms
Figure 14 represents the driver Pull-Down and Pull-Up IV characteristics under process, voltage and temperature best and
worst case conditions. The actual Driver Pull-Down and Pull-Up current must lie between these two bounding curves. The value
of the external ZQ resistor is 240 Ω, setting the nominal driver output impedance to 40 Ω.












FIGURE 14
40 Ohm Driver Pull-Down and Pull-Up Characteristics
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Table 16 lists the numerical values of the minimum and maximum allowed values of the output driver Pull-Down and Pull-Up
IV characteristics.
Rev. 1.1, 2007-09
26
05292007-WAU2-UU95