Microchip SY58611U Handleiding

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SY58611U

3.2Gbps Precision, LVDS 2:1 MUX with

Internal Termination and Fail Safe Input

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

March 2007

M9999-030607-A

[email protected] or (408) 955-1690

General Description

The SY58611U is a 2.5V, high-speed, fully differential

LVDS 2:1 MUX capable of processing clocks up to

2.5GHz and data up to 3.2Gbps. SY58611U is

optimized to provide a buffered output of the selected

input with less than 20ps of skew and less than 10ps

pp

total jitter. Patented MUX Isolation design reduces

crosstalk and provides superior signal integrity.

The differential inputs include Micrel’s unique, 3-pin

input termination architecture that interfaces to LVPECL,

LVDS or CML differential signals, (AC- or DC-coupled)

as small as 100mV

PK

(200mV

pp

) without any level-

shifting or termination resistor networks in the signal

path. For AC-coupled input interface applications, an

integrated reference voltage (V

REF-AC

) is provided to bias

the V

T

pin. The output is LVDS compatible, with rise/fall

times guaranteed to be less than 120ps.

The SY58611U operates from a 2.5V ±5% supply and is

guaranteed over the full industrial temperature range

(–40°C to +85°C). For applications that require CML or

LVPECL output, consider the SY58609U and

SY58610U, 2:1 MUX with 400mV and 800mV output

swings respectively. The SY58611U is part of Micrel’s

high-speed, Precision Edge

®

product line.

Datasheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Functional Block Diagram

Precision Edge

®

Features

∑Selects between two sources and provides buffered

copy of the selected input signal

∑Fail Safe Input

–Prevents output from oscillating when input is

invalid or removed

∑Guaranteed AC performance over temperature and

voltage:

–DC-to > 3.2Gbps throughput

–<420ps typical propagation delay (IN-to-Q)

–<120ps rise/fall times

∑Unique, patented internal termination and VT pin

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

LVDS)

∑Unique, patented MUX input isolation design

minimizes adjacent channel crosstalk

∑Ultra-low jitter design

–<1ps

RMS

cycle-to-cycle jitter

–<10ps

PP

total jitter

–<1ps

RMS

random jitter

–<10ps

PP

deterministic jitter

∑2.5V ±5% power supply operation

∑Industrial temperature range: –40°C to +85°C

∑Available in 16-pin (3mm x 3mm) QFN package

Applications

∑All SONET clock distribution

∑Fibre Channel clock and data distribution

∑Gigabit Ethernet clock or data distribution

∑Backplane distribution

Markets

∑DataCom and Telecom

∑Storage

∑ATE

∑Test and Measurement

Precision Edge is a registered trademark of Micrel, Inc.

Product specificaties