參數(shù)資料
型號: HYB18H256321BF-10
廠商: QIMONDA AG
元件分類: DRAM
英文描述: 256-Mbit GDDR3 Graphics RAM GDDR3 Graphics RAM
中文描述: 8M X 32 SYNCHRONOUS GRAPHICS RAM MODULE, 0.21 ns, PBGA136
封裝: GREEN, PLASTIC, TFBGA-136
文件頁數(shù): 26/41頁
文件大?。?/td> 1302K
代理商: HYB18H256321BF-10
HYB18H256321BF
256-Mbit GDDR3
Internet Data Sheet
Rev. 0.80, 2007-09
09132007-07EM-7OYI
26
4.6
Pin Capacitances
TABLE 13
Pin Capacitances (VDDQ = 1.8 V, TA = 25°C, f = 1 MHz)
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
Table 14
lists the numerical values of the minimum and maximum allowed values of the output driver Pull-Down and Pull-Up
IV characteristics.
Parameter
Symbol
Min.
Max.
Unit
Note
Input capacitance:
A0-A11, BA0-1, CKE, CS, CAS, RAS, WE, CKE, RES,CLK,CLK
Input capacitance:
DQ0-DQ31, RDQS0-RDQS3, WDQS0-WDQS3, DM0-DM3
CI,CCK
1.0
2.5
pF
CIO
2.0
3.0
pF
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