211AI01L datasheet(9/13 Pages) ICST

部品番号	211AI01L

部品情報	LOW SKEW, 1-TO-2 DIFFERENTIAL-TO-HSTL FANOUT BUFFER

PDF	13 Pages

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メーカー	ICST [Integrated Circuit Systems]

ホームページ	http://www.icst.com

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9 / 13 page

85211AMI-01

www.icst.com/products/hiperclocks.html

REV. A NOVEMBER 1, 2005

Integrated

Circuit

Systems, Inc.

ICS85211I-01

LOW SKEW, 1-TO-2

DIFFERENTIAL-TO-HSTL FANOUT BUFFER

3. Calculations and Equations.

The purpose of this section is to derive the power dissipated into the load.

HSTL output driver circuit and termination are shown in Figure 4.

To 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

) * (V

DD_MAX

- V

OH_MAX

)

Pd_L = (V

OL_MAX

) * (V

DD_MAX

- V

OL_MAX

)

Pd_H = (1.4V/50

Ω) * (3.465V - 1.4V) = 57.82mW

Pd_L = (0.4V/50

Ω) * (3.465V - 0.4V) = 24.52mW

Total Power Dissipation per output pair = Pd_H + Pd_L = 82.34mW

FIGURE 4. HSTL DRIVER CIRCUIT AND TERMINATION

OUT

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