ICS8533-01 Datasheet, PDF(8/13 Page) Integrated Circuit Systems – LOW SKEW, 1-TO-4 DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER

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ICS8533-01 Datasheet, PDF (8/13 Pages) Integrated Circuit Systems – LOW SKEW, 1-TO-4 DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER

◁

Integrated

Circuit

Systems, Inc.

ICS8533-01

LOW SKEW, 1-TO-4

DIFFERENTIAL-TO-3.3V LVPECL FANOUT BUFFER

APPLICATION INFORMATION

WIRING THE DIFFERENTIAL INPUT TO ACCEPT SINGLE ENDED LEVELS

Figure 8 shows how the differential input can be wired to accept single end levels. The reference voltage V_REF ~

VCC/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 VCC = 3.3V, V_REF should be 1.25V and

R2/R1 = 0.609.

CLK_IN

0.1Cu1F

0.1uF

VCC

V_REF

FIGURE 8: SINGLE ENDED SIGNAL DRIVING DIFFERENTIAL INPUT

8533AG-01

www.icst.com/products/hiperclocks.html

REV. B JULY 16, 2001

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