ICS5314AI11L datasheet(9/18 Pages) ICST

9 / 18 page

85314AGI-11

www.icst.com/products/hiperclocks.html

REV. C MAY 24, 2005

Integrated

Circuit

Systems, Inc.

ICS85314I-11

LOW SKEW, 1-TO-5

DIFFERENTIAL-TO-2.5V/3.3V LVPECL FANOUT BUFFER

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 in-

put driven by the most common driver types. The input inter-

FIGURE 3A. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY

ICS HIPERCLOCKS LVHSTL DRIVER

faces suggested here are examples only. Please consult with

the vendor of the driver component to confirm the driver termi-

nation requirements. For example in Figure 3A, the input ter-

mination 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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