ICS8524AYLF datasheet(13/17 Pages) IDT

部品番号	ICS8524AYLF

部品情報	LOW SKEW, 1-TO-22 DIFFERENTIAL-TO-HSTL FANOUT BUFFER

PDF	17 Pages

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メーカー	IDT [Integrated Device Technology]

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13 / 17 page

8524AY

www.icst.com/products/hiperclocks.html

REV. B AUGUST 1, 2007

ICS8524

LOW SKEW, 1-TO-22

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 7.

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_MIN

) * (V

DDO_MAX

- V

OH_MIN

)

Pd_L = (V

OL_MAX

) * (V

DDO_MAX

- V

OL_MAX

)

Pd_H = (1V/50

Ω) * (2V - 1V) = 20mW

Pd_L = (0.4V/50

Ω) * (2V - 0.4V) = 12.8mW

Total Power Dissipation per output pair = Pd_H + Pd_L = 32.8mW

FIGURE 7. HSTL DRIVER CIRCUIT AND TERMINATION

DDO

OUT

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