ICS854057 datasheet(9/13 Pages) ICST

9 / 13 page

854057AG

www.icst.com/products/hiperclocks.html

REV. A JULY 18, 2005

Integrated

Circuit

Systems, Inc.

ICS854057

4:1 OR 2:1 LVDS CLOCK MULTIPLEXER

WITH

INTERNAL INPUT TERMINATION

LVPECL INPUT WITH BUILT-IN 50

Ω TERMINATIONS INTERFACE

The PCLK /nPCLK 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 requirements.

Figures 3A to 3E show interface

examples for the HiPerClockS PCLK/nPLCK input with built-in

Ω terminations driven by the most common driver types.The

input interfaces suggested here are examples only. If the driver

is from another vendor, use their termination recommendation.

Please consult with the vendor of the driver component to

confirm the driver termination requirements.

FIGURE 3A. HIPERCLOCKS PCLK/nPCLK INPUT WITH

BUILT-IN 50

Ω DRIVEN BY AN LVDS DRIVER

FIGURE 3B. HIPERCLOCKS PCLK/nPCLK INPUT WITH

BUILT-IN 50

Ω DRIVEN BY AN LVPECL DRIVER

nIN

2.5V

LVDS

3.3V or 2.5V

Zo = 50 Ohm

Receiver

With

Built-In

50 Ohm

Zo = 50 Ohm

Receiver

With

Built-In

50 Ohm

Zo = 50 Ohm

nIN

2.5V

2.5V LVPECL

FIGURE 3E. HIPERCLOCKS PCLK/nPCLK INPUT WITH

BUILT-IN 50

Ω DRIVEN BY AN SSTL DRIVER

FIGURE 3C. HIPERCLOCKS PCLK/nPCLK INPUT WITH

BUILT-IN 50

Ω DRIVEN BY AN OPEN COLLECTOR

CML DRIVER

FIGURE 3D. HIPERCLOCKS PCLK/nPCLK INPUT WITH

BUILT-IN 50

Ω DRIVEN BY A CML DRIVER

WITH

BUILT-IN 50

Ω PULLUP

Zo = 50 Ohm

2.5V

Zo = 50 Ohm

nIN

Receiver

With

Built-In

50 Ohm

2.5V

CML - Open Collector

nIN

Receiver

With

Built-In

50 Ohm

2.5V

Zo = 50 Ohm

CML - Built-in 50 Ohm Pull-up

2.5V

SSTL

nIN

Receiver With Built-In 50

Zo = 50 Ohm

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