ICS8344AYI-01 datasheet(9/13 Pages) IDT

Part #	ICS8344AYI-01

Description	LOW SKEW, 1-TO-24 DIFFERENTIAL -TO-LVCMOS/LVTTL FANOUT BUFFER

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Manufacturer	IDT [Integrated Device Technology]

Direct Link	http://www.idt.com

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IDT™ / ICS™ LVCMOS/LVTTL FANOUT BUFFER

9

ICS8344AYI-01 REV. B MAY 10, 2007

ICS8344I-01

LOW SKEW, 1-TO-24 DIFFERENTIAL-TO-LVCMOS/LVTTL FANOUT BUFFER

PRELIMINARY

FIGURE 2C. HIPERCLOCKS CLK/nCLK INPUT DRIVEN BY

3.3V LVPECL DRIVER

FIGURE 2B. HIPERCLOCKS CLK/nCLK INPUT DRIVEN BY

3.3V LVPECL DRIVER

FIGURE 2D. HIPERCLOCKS CLK/nCLK INPUT DRIVEN BY

3.3V LVDS DRIVER

3.3V

R1

50

R3

50

Zo = 50 Ohm

LVPECL

Zo = 50 Ohm

HiPerClockS

CLK

nCLK

3.3V

Input

R2

50

Zo = 50 Ohm

Input

HiPerClockS

CLK

nCLK

3.3V

R3

125

R2

84

Zo = 50 Ohm

3.3V

R4

125

LVPECL

R1

84

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 2A to 2E show interface

examples for the HiPerClockS CLK/nCLK input driven by the most

common driver types. The input interfaces suggested here are

FIGURE 2A. HIPERCLOCKS CLK/nCLK INPUT DRIVEN BY

IDT HIPERCLOCKS LVHSTL DRIVER

examples only. Please consult with the vendor of the driver

component to confirm the driver termination requirements. For

example in Figure 2A, the input termination applies for IDT

HiPerClockS LVHSTL drivers. If you are using an LVHSTL driver

from another vendor, use their termination recommendation.

1.8V

R2

50

Input

LVHSTL Driver

ICS

HiPerClockS

R1

50

LVHSTL

3.3V

Zo = 50 Ohm

HiPerClockS

CLK

nCLK

FIGURE 2E. HIPERCLOCKS CLK/NCLK INPUT DRIVEN BY

3.3V LVPECL DRIVER WITH AC COUPLE

Zo = 50 Ohm

R3

125

HiPerClockS

CLK

nCLK

3.3V

R5

100 - 200

3.3V

R2

84

3.3V

R6

100 - 200

Input

R5,R6 locate near the driver pin.

Zo = 50 Ohm

R1

84

R4

125

C2

LVPECL

C1

Zo = 50 Ohm

R1

100

3.3V

LVDS_Driv er

Zo = 50 Ohm

Receiv er

CLK

nCLK

3.3V

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ICS8344AYI-01 Datasheet(PDF) 9 Page - Integrated Device Technology

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