Microchip SY89473U Manual

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SY89473U

Precision LVPECL 2:1 Multiplexer with 1:2

Fanout and Internal Termination

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

May 2007 M9999-052207-B

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

General Description

The SY89473U is a 2.5V/3.3V precision, high-speed 2:1

differential MUX capable of processing clocks up to

2.5GHz and data up to 2.5Gbps.

The differential input includes Micrel’s unique, 3-pin

input termination architecture that directly interfaces to

any differential signal (AC- or DC-coupled) as small as

100mV (200mVPP) without any level shifting or

termination resistor networks in the signal path. The

output is 800mV, 100K-compatible, LVPECL with fast

rise/fall times guaranteed to be less than 190ps.

The SY89473U operates from a 2.5V ±5% or 3.3V

±10% supply and is guaranteed over the full industrial

temperature range of –40°C to +85°C. The SY89473U is

part of Micrel’s high-speed, Precision Edge® product

line. For multiple-clock switchover solutions, please refer

to the SY89840–SY89843U family.

All support documentation can be found on Micrel’s web

site at: www.micrel.com.

Functional Block Diagram

Precision Edge®

Features

•Selects between two input channels and provides two

copies of the selected output

•Guaranteed AC performance over temperature and

supply voltage:

- DC to 2.5Gbps data throughput

- DC to 2.5GHz fMAX (clock)

- <500ps In-to-Out tpd

- <190ps tr/tf

- <20ps Output-to-output skew

•Unique patented input isolation design minimizes

crosstalk

•Ultra-low Jitter Design:

- <1psRMS random jitter

- <1psRMS cycle-to-cycle jitter

- <10psPP total jitter (clock)

- <0.7psRMS

crosstalk induced jitter

•Unique patent-pending input termination and VT pin

accepts DC- and AC-coupled inputs (CML, PECL,

LVDS)

•800mV (100K) LVPECL output swing

•2.5V ±5% or 3.3V ±10% supply voltage

•-40°C to +85°C industrial temperature range

•Available in 24-pin (4mm x 4mm) QFN package

Applications

•Clock switchover

•Data distribution

Markets

•LAN/WAN

•Enterprise servers

•ATE

•Test and measurement

Precision Edge is a registered trademark of Micrel, Inc.

Micrel, Inc. SY89473U

May 2007 2 M9999-052207-B

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

Ordering Information(1)

Part Number Package Type Operating

Range

Package Marking Lead

Finish

SY89473UMG QFN-24 Industrial 473U with Pb-Free bar-line indicator NiPdAu

Pb-Free

SY89473UMGTR(2) QFN-24 Industrial 473U with Pb-Free bar-line indicator NiPdAu

Pb-Free

Notes:

1. Contact factory for die availability. Dice are guaranteed at T

A = 25°C, DC Electricals Only.

2. Tape and Reel.

Pin Configuration

24-Pin QFN

Produkt Specifikationer

Mærke:	Microchip
Kategori:	Ikke kategoriseret
Model:	SY89473U

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