ICS85411AMILF datasheet(8/16 Pages) IDT

Numer części	ICS85411AMILF

Szczegółowy opis	LOW SKEW, 1-TO-2 DIFFERENTIAL-TOLVDS FANOUT BUFFER

PDF	16 Pages

Scroll/Zoom	100%

Producent	IDT [Integrated Device Technology]

Strona internetowa	http://www.idt.com

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IDT™ / ICS™ DIFFERENTIAL-TO-LVDS FANOUT BUFFER

ICS85411AMI REV. B NOVEMBER 7, 2007

ICS85411I

LOW SKEW, 1-TO-2 DIFFERENTIAL-TO-LVDS FANOUT BUFFER

APPLICATION INFORMATION

Figure 1 shows how the differential input can be wired to accept

single ended levels. The reference voltage V_REF = V

/2 is

generated by the bias resistors R1, R2 and C1. This bias circuit

should be located as close as possible to the input pin. The ratio

FIGURE 1. SINGLE ENDED SIGNAL DRIVING DIFFERENTIAL INPUT

WIRING THE DIFFERENTIAL INPUT TO ACCEPT SINGLE ENDED LEVELS

of R1 and R2 might need to be adjusted to position the V_REF in

the center of the input voltage swing. For example, if the input

clock swing is only 2.5V and V

= 3.3V, V_REF should be 1.25V

and R2/R1 = 0.609.

V_REF

0.1u

Single Ended Clock Input

CLK

nCLK

VDD

RECOMMENDATIONS FOR UNUSED OUTPUT PINS

OUTPUTS:

LVDS

All unused LVDS output pairs can be either left floating or

terminated with 100

Ω across. If they are left floating, there

should be no trace attached.

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