Name: Microchip SY58020U
Brand: Microchip
SKU: 1670556
Rating: 96 (1 reviews)

user manualMicrochip SY58020U

SY58020U

6GHz, 1:4 CML Fanout Buffer/Translator

with Internal I/O Termination

Precision Edge is a trademark of Micrel, Inc.

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

October 27

, 2014

Revision 5.0

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

General Description

The SY58020U is a 2.5V/3.3V precision, high-speed, fully

differential 1:4 CML fanout buffer. Optimized to provide

four identical output copies with less than 15ps of skew

and 27fs

RMS

of typical additive phase jitter, the SY58020U

can process clock signals as fast as 6GHz.

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

termination architecture that interfaces to differential

LVPECL, LVDS, and CML signals (AC- or DC-coupled) as

small as 100mV without any level-shifting or termination

resistor networks in the signal path. For AC-coupled input

interface applications, an on-board output reference

voltage (V

REF-AC

) is provided to bias the V

pin. The outputs

are optimized to drive 400mV typical swing into 50Ω loads,

with extremely fast rise/fall times guaranteed to be less

than 60ps.

The SY58020U operates from a 2.5V ±5% supply or 3.3V

±10% supply and is guaranteed over the full industrial

temperature range (–40°C to +85°C). For applications that

require LVPECL outputs, consider the SY58021U or

SY58022U 1:4 fanout buffer with 800mV and 400mV

output swing, respectively. The SY58020U is part of

Micrel’s high-speed, Precision Edge

product line.

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com

Features

• Precision 1:4, 400mV CML fanout buffer

• Guaranteed AC performance over temperature/voltage:

− > 6GHz f

MAX

clock

− < 60ps t

/ t

times

− < 250ps t

− <

15ps max. skew

• Low-jitter performance:

− 27fs

RMS

typical additive phase jitter

• Accepts an input signal as low as 100mV

• Unique patented input termination and V

pin accepts

DC-coupled and AC-coupled differential inputs:

LVPECL, LVDS, and CML

• 50Ω source terminated CML outputs

• Power supply 2.5V ±5% and 3.3V ±10%

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

• Available in 16-pin (3mm x 3mm) QFN pack

age

Applications

• All SONET and All GigE clock distribution

• Fibre Channel clock and data distribution

• Backplane distribution

• Data distribution: OC-48, OC-48+FEC, XAUI

• High-end, low skew, multiprocessor synchronous clock

distribution

Functional Block Diagram Typical Performance

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