ICS8516I datasheet(9/13 Pages) ICST

9 / 13 page

8516FYI

www.icst.com/products/hiperclocks.html

REV. A JULY 30, 2004

Integrated

Circuit

Systems, Inc.

ICS8516I

LOW SKEW, 1-TO-16

DIFFERENTIAL-TO-LVDS CLOCK DISTRIBUTION CHIP

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

DIFFERENTIAL CLOCK INPUT INTERFACE

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

and other differential signals. Both V

SWING and VOH must meet

the V

PP and VCMR input requirements. Figures 3A to 3E show

interface examples for the HiPerClockS CLK/nCLK input driven

by the most common driver types. The input interfaces sug-

FIGURE 3A. HIPERCLOCKS CLK/nCLK INPUT DRIVEN BY

ICS HIPERCLOCKS LVHSTL DRIVER

gested here are examples only. Please consult with the vendor

of the driver component to confirm the driver termination re-

quirements. For example in

Figure 3A, the input termination

applies for ICS HiPerClockS LVHSTL drivers. If you are using

an LVHSTL driver from another vendor, use their termination

recommendation.

1.8V

Input

LVHSTL Driver

ICS

HiPerClockS

LVHSTL

3.3V

Zo = 50 Ohm

HiPerClockS

CLK

nCLK

FIGURE 3E. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY

3.3V LVPECL DRIVER WITH AC COUPLE

Zo = 50 Ohm

125

HiPerClockS

CLK

nCLK

3.3V

100 - 200

3.3V

100 - 200

Input

R5,R6 locate near the driver pin.

Zo = 50 Ohm

125

LVPECL

Zo = 50 Ohm

100

3.3V

LVDS_Driv er

Zo = 50 Ohm

Receiv er

CLK

nCLK

3.3V

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