ICS8516 datasheet(10/16 Pages) IDT

10 / 16 page

LOW SKEW, 1-TO-16

DIFFERENTIAL-TO-LVDS CLOCK DISTRIBUTION CHIP

8516 DATA SHEET

REVISION B 6/11/15

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

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 VSWING and VOH must meet the

VPP and VCMR input requirements. Figures 2A to 2E show inter-

face examples for the HiPerClockS CLK/nCLK input driven by

the most common driver types. The input interfaces suggested

FIGURE 2A. HIPERCLOCKS CLK/nCLK INPUT DRIVEN BY

ICS HIPERCLOCKS LVHSTL DRIVER

here are 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 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 2E. 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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