ICS831721I datasheet(14/17 Pages) IDT

Part #	ICS831721I

Description	Differential Clock/Data Multiplexer

PDF	17 Pages

Scroll/Zoom	100%

Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

Logo

14 / 17 page

ICS831721I Data Sheet

DIFFERENTIAL CLOCK/DATA MULTIPLEXER

ICS831721AGI REVISION A AUGUST 19, 2011

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

Ω 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

Ω) * 17mA

Total Power Dissipation per output pair = 46.8mW

VDD

VOUT

Ω

IOUT = 17mA

RREF =

475

Ω ± 1%

ICS831721I Datasheet(PDF) 14 Page - Integrated Device Technology