ICS8547 datasheet(8/12 Pages) ICST

Part #	ICS8547

Description	HEX, LOW SKEW, 1-TO-2 DIFFERENTIAL-TO-LVDS CLOCK BUFFERS

PDF	12 Pages

Scroll/Zoom	100%

Manufacturer	ICST [Integrated Circuit Systems]

Direct Link	http://www.icst.com

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8 / 12 page

ICS8547AY

www.icst.com/products/hiperclocks.html

REV. A FEBRUARY 4, 2003

Integrated

Circuit

Systems, Inc.

ICS8547

HEX, LOW SKEW, 1-TO-2

DIFFERENTIAL-TO-LVDS CLOCK BUFFERS

APPLICATION INFORMATION

FIGURE 1. SINGLE ENDED SIGNAL DRIVING DIFFERENTIAL INPUT

CLK_IN

0.1uF

V_REF

Figure 1 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

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

DD = 3.3V, V_REF should be 1.25V

and R2/R1 = 0.609.

ICS8547 Datasheet(PDF) 8 Page - Integrated Circuit Systems