SY58034U Datasheet, PDF (1/11 Pages) Micrel Semiconductor – 6GHz, 1:6 CML FANOUT BUFFER WITH 2:1 MUX INPUT AND INTERNAL I/O TERMINATION

Micrel, Inc.
6GHz, 1:6 CML FANOUT BUFFER
WITH 2:1 MUX INPUT AND
INTERNAL I/O TERMINATION
Precision Edge®
Precision E^SYd⁵g⁸e^03®4U
SY58034U
FEATURES
■ 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
• <290ps IN-to-OUT t_pd
• <60ps t_r / t_f times
• <20ps skew (output-to-output)
■ Unique input isolation design minimizes crosstalk
■ Ultra low-jitter design:
• <1ps_RMS random jitter
• <10ps_PP total jitter (clock)
• <1ps_RMS cycle-to-cycle jitter
• <0.7ps_RMS crosstalk-induced jitter
■ 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)
■ Internal 50Ω output source termination
■ 400mV CML output swing
■ –40°C to +85°C temperature range
■ Available in 32-pin (5mm × 5mm) MLF^® package
Precision Edge^®
DESCRIPTION
The SY58034U 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 50Ω source
terminated CML, with extremely fast rise/fall times
guaranteed to be less than 60ps.
The SY58034U 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 LVPECL outputs, consider the SY58035U or
SY58036U Multiplexers. The SY58034U is part of Micrel’s
high-speed, Precision Edge^® product line.
All support documentation can be found on Micrel’s web
site at www.micrel.com.
APPLICATIONS
FUNCTIONAL BLOCK DIAGRAM
■ Redundant clock distribution
■ All SONET/SDH clock distribution
■ All Fibre Channel distribution
■ All Gigabit Ethernet clock distribution
IN0
50Ω
V_T0
50Ω
/IN0
V_REF-AC0
IN1
50Ω
V_T1
50Ω
/IN1
V_REF-AC1
SEL
(TTL/CMOS)
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
M9999-020707
[e-mail] or [phone]
1
2:1 MUX
0
MUX
1S
1:6 Fanout
Q0
/Q0
Q1
/Q1
Q2
/Q2
Q3
/Q3
Q4
/Q4
Q5
/Q5
Rev.: D Amendment: /0
Issue Date: February 2007