Internet Data Sheet
HYB18H256321BF
256-Mbit GDDR3
4.6
Pin Capacitances
TABLE 13
Pin Capacitances (VDDQ = 1.8 V, TA = 25°C, f = 1 MHz)
Parameter
Symbol
Min.
Max.
Unit
Note
Input capacitance:
CI,CCK
1.0
2.5
pF
A0-A11, BA0-1, CKE, CS, CAS, RAS, WE, CKE, RES,CLK,CLK
Input capacitance:
CIO
2.0
3.0
pF
DQ0-DQ31, RDQS0-RDQS3, WDQS0-WDQS3, DM0-DM3
4.7
Driver current characteristics
4.7.1
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
3XOOꢃ8Sꢀ&KDUDFWHUVWLFV
3XOOꢃ'RZQꢀ&KDUDFWHUVWLFV
ꢅꢒꢅ
ꢅꢒꢄ
ꢀꢒꢅ
ꢀꢒꢄ
ꢃꢒꢅ
ꢄꢅ
ꢇꢄ
ꢇꢅ
ꢁꢄ
ꢁꢅ
ꢃꢄ
ꢃꢅ
ꢀꢄ
ꢀꢅ
ꢄ
ꢅ
ꢌꢄ
ꢌꢀꢅ
ꢌꢀꢄ
ꢌꢃꢅ
ꢌꢃꢄ
ꢌꢁꢅ
ꢌꢁꢄ
ꢌꢇꢅ
ꢌꢇꢄ
ꢌꢄꢅ
ꢅ
ꢅꢒꢅ
ꢅꢒꢄ
ꢀꢒꢅ
9RXWꢀꢁ9ꢂ
ꢀꢒꢄ
ꢃꢒꢅ
9''4ꢀꢃꢀ9RXWꢀꢁ9ꢂ
Table 14 lists the numerical values of the minimum and maximum allowed values of the output driver Pull-Down and Pull-Up
IV characteristics.
Rev. 0.80, 2007-09
26
09132007-07EM-7OYI
QIMONDA [ QIMONDA AG ]
