ICS8521 datasheet(8/13 Pages) ICST

部品番号	ICS8521

部品情報	LOW SKEW, 1-TO-9 DIFFERENTIAL-TO-LVHSTL FANOUT BUFFER

PDF	13 Pages

Scroll/Zoom	100%

メーカー	ICST [Integrated Circuit Systems]

ホームページ	http://www.icst.com

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8 / 13 page

Integrated

Circuit

Systems, Inc.

ICS8521

LOW SKEW, 1-TO-9

DIFFERENTIAL-TO-LVHSTL FANOUT BUFFER

8521BY

www.icst.com/products/hiperclocks.html

REV. B JULY 31, 2001

APPLICATION INFORMATION

WIRING THE DIFFERENTIAL INPUT TO ACCEPT SINGLE ENDED LEVELS

Figure 9 shows how the differential input can be wired to accept single ended levels. The reference voltage V_REF ~ V

DD/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 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

DD = 3.3V, V_REF should be 1.25V and R2/R1 = 0.609.

FIGURE 9 - SINGLE ENDED SIGNAL DRIVING DIFFERENTIAL INPUT

CLK_IN

0.1uF

V_REF

ICS8521 データシート(PDF) 8 Page - Integrated Circuit Systems