1

SY58036U

Micrel, Inc.

M9999-020707

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

DESCRIPTION

■ Provides six ultra-low skew copies of the selected

input

■ 2:1 MUX input included for clock switchover

applications

■ Guaranteed AC performance over temperature and

voltage:

•Clock frequency range: DC to > 6GHz

• <20ps skew (output-to-output)

■ Ultra-low jitter design:

■ Low supply voltage operation: 2.5V and 3.3V

■ Unique input termination and VT pin accepts DC-

coupled and AC-coupled inputs (CML, PECL, LVDS)

■ Unique input isolation design minimizes crosstalk

■ 400mV LVPECL (100K compatible) output swing

■ Available in 32-pin (5mm ×

×

×

×

FEATURES

6GHz, 1:6 400mV LVPECL FANOUT

BUFFER WITH 2:1 MUX INPUT

AND INTERNAL TERMINATION

SY58036U

APPLICATIONS

■ Redundant clock distribution

■ All SONET/SDH clock distribution

■ All Fibre Channel distribution

■ All Gigabit Ethernet clock distribution

The SY58036U is a 2.5V/3.3V precision, high-speed, 1:6

fanout buffer capable of handling clocks up to 6GHz. A

differential 2:1 MUX input is included for redundant clock

switchover applications.

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

termination architecture that allows the device to interface

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

100mV without any level shifting or termination resistor

networks in the signal path. The outputs are 400mV LVPECL

(100K temperature compensated), with extremely fast rise/

fall times guaranteed to be less than 80ps.

The SY58036U operates from a 2.5V ±5% supply or a

3.3V ±10% supply and is guaranteed over the full industrial

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

require CML outputs, consider the SY58034U or for 800mV

LVPECL outputs the SY58035U. The SY58036U is part of

All support documentation can be found on Micrel’s web

site at www.micrel.com.

FUNCTIONAL BLOCK DIAGRAM

Precision Edge is a registered trademark of Micrel, Inc.

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

Q0

/Q0

Q1

/Q1

Q2

/Q2

Q3

/Q3

Q4

/Q4

Q5

/Q5

IN0

/IN0

50Ω

50Ω

IN1

/IN1

50Ω

50Ω

0

1

Mux

SEL

(TTL/CMOS)

S

2:1 Mux

1:6 Fanout

Rev.: D

Amendment: /0

Issue Date:

February 2007