85222AMLF datasheet(8/13 Pages) IDT

Part #	85222AMLF

Description	Dual LVCMOS / LVTTL-TO-Differential

PDF	13 Pages

Scroll/Zoom	100%

Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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8 / 13 page

DUAL LVCMOS / LVTTL-TO-DIFFERENTIAL

LVHSTL TRANSLATOR

85222 DATA SHEET

REVISION C 5/7/15

3. Calculations and Equations.

The purpose of this section is to derive the power dissipated into the load.

LVHSTL output driver circuit and termination are shown in Figure 2.

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_MAX /RL) * (VDD_MAX - VOH_MAX)

Pd_L = (V

OL_MAX /RL) * (VDD_MAX - VOL_MAX)

Pd_H = (1.2V/50

Ω) * (3.465V - 1.2V) = 54.4mW

Pd_L = (0.4V/50

Ω) * (3.465V - 0.4V) = 24.52mW

Total Power Dissipation per output pair = Pd_H + Pd_L = 78.9mW

FIGURE 2. LVHSTL DRIVER CIRCUIT AND TERMINATION

85222AMLF Datasheet(PDF) 8 Page - Integrated Device Technology