TBD datasheet(7/10 Pages) ICST

Numer części	TBD

Szczegółowy opis	1-TO-2 LVCMOS / LVTTL-TO DIFFERENTIAL HSTL TRANSLATOR

PDF	10 Pages

Scroll/Zoom	100%

Producent	ICST [Integrated Circuit Systems]

Strona internetowa	http://www.icst.com

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7 / 10 page

85222AM-02

www.icst.com/products/hiperclocks.html

REV. A JANUARY 25, 2006

Integrated

Circuit

Systems, Inc.

ICS85222-02

1-TO-2 LVCMOS / LVTTL-TO-

DIFFERENTIAL HSTL TRANSLATOR

PRELIMINARY

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 1.

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

DD_MAX

- V

OH_MIN

)

Pd_L = (V

OL_MAX

) * (V

DD_MAX

- V

OL_MAX

)

Pd_H = (1V/50

Ω) * (3.465V - 1V) = 49.3mW

Pd_L = (0.4V/50

Ω) * (3.465V - 0.4V) = 24.52mW

Total Power Dissipation per output pair = Pd_H + Pd_L = 73.8mW

FIGURE 1. HSTL DRIVER CIRCUIT AND TERMINATION

OUT

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