ICS85214AG 데이터 시트보기 (PDF) - Integrated Circuit Systems

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ICS85214AG

LOW SKEW, 1-TO-5 DIFFERENTIAL-TO-HSTL FANOUT BUFFER

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

ICS85214

LOW SKEW, 1-TO-5

DIFFERENTIAL-TO-HSTL FANOUT BUFFER

APPLICATION INFORMATION

WIRING THE DIFFERENTIAL INPUT TO ACCEPT SINGLE ENDED LEVELS

Figure 2 shows how the differential input can be wired to accept

single ended levels. The reference voltage V_REF = V /2 is

DD

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 = 3.3V, V_REF should be 1.25V

DD

and R2/R1 = 0.609.

V

DD

CLK_IN

C1

0.1uF

R1

1K

+

V_REF

-

R2

1K

FIGURE 2. SINGLE ENDED SIGNAL DRIVING DIFFERENTIAL INPUT

85214AG

www.icst.com/products/hiperclocks.html

7

REV. A JULY 17, 2003

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