ICS85214 datasheet(8/16 Pages) ICST

8 / 16 page

85214AG

www.icst.com/products/hiperclocks.html

REV. A JULY 17, 2003

Integrated

Circuit

Systems, Inc.

ICS85214

LOW SKEW, 1-TO-5

DIFFERENTIAL-TO-HSTL FANOUT BUFFER

DIFFERENTIAL CLOCK INPUT INTERFACE

The CLK /nCLK accepts LVDS, LVPECL, HSTL, SSTL, HCSL

and other differential signals. Both V

SWING and VOH must meet the

PP and VCMR input requirements. Figures 3A to 3D show inter-

face examples for the ICS85214 clock input driven by the most

common driver types. The input interfaces suggested here are

examples only. Please consult with the vendor of the driver com-

ponent to confirm the driver termination requirements. For ex-

ample in

Figure 3A, the input termination applies for ICS

HiPerClockS HSTL drivers. If you are using an HSTL driver from

another vendor, use their termination recommendations.

FIGURE 3C. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY

3.3V LVPECL DRIVER

FIGURE 3B. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY

3.3V LVPECL DRIVER

FIGURE 3D. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY

3.3V LVDS DRIVER

3.3V

Zo = 50 Ohm

LVPECL

Zo = 50 Ohm

HiPerClockS

CLK

nCLK

3.3V

Input

Zo = 50 Ohm

Input

HiPerClockS

CLK

nCLK

3.3V

125

Zo = 50 Ohm

3.3V

125

LVPECL

3.3V

FIGURE 3A. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY

ICS HIPERCLOCKS LVHSTL DRIVER

1.8V

Input

LVHSTL Driver

ICS

HiPerClockS

LVHSTL

3.3V

Zo = 50 Ohm

HiPerClockS

CLK

nCLK

Zo = 50 Ohm

100

3.3V

LVDS_Driv er

Zo = 50 Ohm

Receiv er

CLK

nCLK

3.3V

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