SY58022U_09 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – 5.5GHz 1:4 FANOUT BUFFER/ translator w/400mV LVPECL OUTPUTS

Micrel, Inc.
5.5GHz 1:4 FANOUT BUFFER/
translator w/400mV LVPECL
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SY58022U
OUTPUTS AND INTERNAL INPUT TERMINATION
FEATURES
■ Precision 1:4, 400mV LVPECL fanout buffer
■ Guaranteed AC performance over temperature and
voltage:
• > 5.5GHz f_MAX clock
• < 80ps t_r/t_f times
• < 250ps (V_IN ≥ 300mV) t_pd
• < 15ps max. skew
■ Low jitter performance:
• < 10ps_PP total jitter (clock)
• < 1ps_RMS random jitter (data)
• < 10ps_PP deterministic jitter (data)
■ Accepts an input signal as low as 100mV
■ Unique input termination and V_T pin accepts
DC- and AC-coupled differential inputs:  LVPECL,
LVDS and CML
■ 400mV LVPECL compatible outputs
■ Power supply 2.5V ±5% and 3.3V ±10%
■ –40°C to +85°C temperature range
■ Available in 16-pin (3mm × 3mm) MLF^® package
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
Precision Edge^®
DESCRIPTION
The SY58022U is a 2.5V/3.3V precision, high-speed, fully
differential 1:4 LVPECL fanout buffer. Optimized to provide
four identical output copies with less than 15ps of skew and
less than 10ps_PP total jitter, the SY58022U can process clock
signals as fast as 5.5GHz.
The differential input includes Micrel’s unique, 3-pin input
termination architecture interfaces to differential LVPECL,
CML, and LVDS 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_T pin. The outputs are 400mV LVPECL
compatible, with extremely fast rise/fall times guaranteed to
be less than 80ps.
The SY58022U 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 greater output swing or CML compatible outputs,
consider the SY58021U 1:4 fanout buffer with LVPECL
outputs, or the SY58020U 1:4 fanout buffer with 400mV
CML outputs. The SY58022U is part of Micrel’s high-speed,
Precision Edge^® product line. All data sheets and support
documentation can be found on Micrel’s web site at: www.
micrel.com.
Functional block diagram
Q0
IN
50Ω
/Q0
V_T
50Ω
Q1
/IN
/Q1
V_REF-AC
Q2
/Q2
Q3
/Q3
TYPICAL Performance
Precison Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.
1
Rev.: E Amendment: /1
Issue Date: June 2009