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參數(shù)資料
| 型號： | 211BI03L |
| 英文描述： | LOW SKEW, 1-TO-2 DIFFERENTIAL-TO-LVHSTL FANOUT BUFFER |
| 中文描述： | 低偏移，1至2差分至LVHSTL扇出緩沖器 |
| 文件頁數(shù)： | 10/14頁 |
| 文件大小： | 165K |
| 代理商： | 211BI03L |
85211BMI-03
www.icst.com/products/hiperclocks.html
REV. B NOVEMBER 15, 2005
10
Integrated
Circuit
Systems, Inc.
ICS85211BI-03
L
OW
S
KEW
, 1-
TO
-2
D
IFFERENTIAL
-
TO
-LVHSTL F
ANOUT
B
UFFER
3. Calculations and Equations.
The purpose of this section is to derive the power dissipated into the load.
LVHSTL output driver circuit and termination are shown in
Figure 4.
T
o calculate worst case power dissipation into the load, use the following equations which assume a 50
Ω
load.
Pd_H is power dissipation when the output drives high.
Pd_L is the power dissipation when the output drives low.
Pd_H = (V
OH_MAX
/R
L
) * (V
DD_MAX
- V
OH_MAX
)
Pd_L = (V
OL_MAX
/R
L
) * (V
DD_MAX
- V
OL_MAX
)
Pd_H = (1.15V/50
Ω
) * (3.465V - 1.15V) = 53.24mW
Pd_L = (0.4V (50
Ω
) * (3.465V - 0.4V) = 24.52mW
Total Power Dissipation per output pair = Pd_H + Pd_L =
77.76mW
F
IGURE
4. LVHSTL D
RIVER
C
IRCUIT
AND
T
ERMINATION
V
DD
V
OUT
RL
50
Ω
Q1
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