SM802108 datasheet(3/11 Pages) MICREL

No de pièce	SM802108

Description	ClockWorks??10GbE & GbE (156.25MHz, 125MHz) Ultra-Low Jitter, LVPECL Frequency Synthesizer

PDF	11 Pages

Scroll/Zoom	100%

Fabricant	MICREL [Micrel Semiconductor]

Site Internet	http://www.micrel.com

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3 / 11 page

Micrel, Inc.

SM802108

January 2011

M9999-012111-A

hbwhelp@micrel.com or (408) 955-1690

Pin Description (Continued)

Pin Number

Pin Name

Pin Type

Pin Level

Pin Function

7, 12, 15, 19

TEST

Factory Test Pins, Do not connect anything to these pins.

VDD

PWR

Core Power Supply

REF_IN

I, (SE)

LVCMOS

Reference Clock Input

XIN

I, (SE)

12pF crystal

Crystal Reference Input, no load caps needed.

See Fig. 5.

XOUT

O, (SE)

12pF crystal

Crystal Reference Output, no load caps needed.

See Fig. 5.

13, 14

VSS

PWR

Core Power Supply Ground

VDDO1

PWR

Power Supply for Output Bank 1

VSSO1

PWR

Power Supply Ground for Output Bank 1

Application Information

Input Reference

When operating with a crystal input reference, do not

apply a switching signal to REF_IN.

Crystal Layout

Keep the layers under the crystal as open as possible.

Do not place switching signals or noisy supplies under

the crystal.

Truth Table

PLL_BYPASS

XTAL_SEL

INPUT

OUTPUT

−

PLL

−

XTAL/REF_IN

−

REF_IN

−

XTAL

−

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