ICS8624 datasheet(12/16 Pages) ICST

Part #	ICS8624

Description	LOW SKEW, 1-TO-5 DIFFERENTIAL-TO-HSTL ZERO DELAY BUFFER

PDF	16 Pages

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Manufacturer	ICST [Integrated Circuit Systems]

Direct Link	http://www.icst.com

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12 / 16 page

8624BY

www.icst.com/products/hiperclocks.html

REV. C JUNE 15, 2004

Integrated

Circuit

Systems, Inc.

ICS8624

LOW SKEW, 1-TO-5

DIFFERENTIAL-TO-HSTL ZERO DELAY 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 5.

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) * (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 5. HSTL DRIVER CIRCUIT AND TERMINATION

DDO

OUT

Ω

ICS8624 Datasheet(PDF) 12 Page - Integrated Circuit Systems