ICS858012 datasheet(7/15 Pages) ICST

7 / 15 page

858012AK

www.icst.com/products/hiperclocks.html

REV. A NOVEMBER 28, 2005

Integrated

Circuit

Systems, Inc.

ICS858012

LOW SKEW, 1-TO-2, DIFFERENTIAL-TO-

2.5V, 3.3V LVPECL FANOUT BUFFER

PRELIMINARY

LVPECL INPUT WITH BUILT-IN 50

Ω TERMINATION INTERFACE (3.3V)

The IN /nIN with built-in 50

Ω terminations accepts LVDS,

LVPECL, LVHSTL, CML, SSTL and other differential signals.

Both VSWING and VOH must meet the V

PP and VCMR input require-

ments. Figures 2A to 2E show interface examples for the

HiPerClockS IN/nIN input with built-in 50

Ω terminations driven

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

gested here are examples only. If the driver is from another ven-

dor, use their termination recommendation. Please consult with

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

nation requirements.

FIGURE 2A. HIPERCLOCKS IN/nIN INPUT WITH

BUILT-IN 50

Ω DRIVEN BY AN LVDS DRIVER

FIGURE 2B. HIPERCLOCKS IN/nIN INPUT WITH

BUILT-IN 50

Ω DRIVEN BY AN LVPECL DRIVER

FIGURE 2D. HIPERCLOCKS IN/nIN INPUT WITH

BUILT-IN 50

Ω DRIVEN BY A CML DRIVER

WITH

BUILT-IN 50

Ω PULLUP

3.3V

Zo = 50 Ohm

3.3V

LVDS

Receiver

With

Built-In

50 Ohm

nIN

Zo = 50 Ohm

nIN

3.3V

Zo = 50 Ohm

Receiver

With

Built-In

50 Ohm

3.3V

LVPECL

Zo = 50 Ohm

FIGURE 2E. HIPERCLOCKS IN/nIN INPUT WITH

BUILT-IN 50

Ω DRIVEN BY AN SSTL DRIVER

3.3V

Receiver

With

Built-In

50 Ohm

Zo = 50 Ohm

nIN

3.3V

Zo = 50 Ohm

CML- Built-in 50 Ohm Pull-Up

FIGURE 2C. HIPERCLOCKS IN/nIN INPUT WITH

BUILT-IN 50

Ω DRIVEN BY A CML DRIVER

WITH

OPEN COLLECTOR

Zo = 50 Ohm

3.3V

Receiver

With

Built-In

50 Ohm

nIN

SSTL

3.3V

CML- Open Collector

nIN

Zo = 50 Ohm

Receiver

With

Built-In

50 Ohm

3.3V

Zo = 50 Ohm

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