ICS831742I datasheet(15/18 Pages) IDT

Part #	ICS831742I

Description	Maximum input/output clock frequency

PDF	18 Pages

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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15 / 18 page

ICS831742I Data Sheet

4:2 DIFFERENTIAL CLOCK/DATA MULTIPLEXER

ICS831742AGI JULY 10, 2012

3. Calculations and Equations.

The purpose of this section is to calculate power dissipation on the IC per HCSL output pair.

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

Figure 4. HCSL Driver Circuit and Termination

HCSL is a current steering output which sources a maximum of 17mA of current per output. To calculate worst case on-chip power dissipation,

use the following equations which assume a 50

 load to ground.

The highest power dissipation occurs when VDD_MAX.

Power = (VDD_MAX – VOUT) * IOUT,

since VOUT = IOUT * RL

= (VDD_MAX – IOUT * RL) * IOUT

= (3.6V – 17mA * 50

) * 17mA

Total Power Dissipation per output pair = 46.8mW

VDD

VOUT

IOUT = 17mA

RREF =

475

Ω ± 1%

ICS831742I Datasheet(PDF) 15 Page - Integrated Device Technology