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SY58011U

Micrel, Inc.

M9999-020207

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

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DESCRIPTION

Precision 1:2, 400mV CML fanout buffer

Guaranteed AC performance over temperature/

voltage:

• < 15ps max. skew

Low jitter performance:

Accepts an input signal as low as 100mV

coupled and AC-coupled differential

inputs: LVPECL, LVDS, and CML

50

Power supply 2.5V

Industrial temperature range: –40

Available in 16-pin (3mm

FEATURES

7GHz, 1:2 CML FANOUT

BUFFER/TRANSLATOR WITH

INTERNAL I/O TERMINATION

SY58011U

APPLICATIONS

s All SONET and GigE clock distribution

s Fibre Channel clock and data distribution

s Backplanes

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

s High-end, low skew, multiprocessor synchronous

clock distribution

Rev.: D

Amendment: /0

Issue Date:

February 2007

The SY58011U is a 2.5V/3.3V precision, high-speed, fully

differential 1:2 CML fanout buffer. Optimized to provide two

identical output copies with less than 15ps of skew and less

signals as fast as 7GHz or data patterns up to 10.7Gbps.

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

termination architecture that interfaces to LVPECL, LVDS,

or CML differential signals, (AC-coupled 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

compatible with 400mV typical swing into 50

Ω loads, with

extremely fast rise/fall times guaranteed to be less than

60ps.

The SY58011U 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 SY58012U or

SY58013U 1:2 fanout buffer with 800mV and 400mV output

swing, respectively. The SY58011U is part of Micrel’s high-

speed, Precision Edge™ product line. Data sheets and

support documentation can be found on Micrel’s web site at

www.micrel.com.

FUNCTIONAL BLOCK DIAGRAM

TYPICAL PERFORMANCE

Precision Edge is a registered trademark of Micrel, Inc.

MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.

IN

/IN

Q1

/Q1

Q0

/Q0

50

Ω

50

Ω

2GHz Output

TIME (70ps/div.)

2GHz with 100mV Input