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SY58011U_08 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – 7GHz, 1:2 CML FANOUT BUFFER/TRANSLATOR WITH INTERNAL I/O TERMINATION
Micrel, Inc.
7GHz, 1:2 CML FANOUT
BUFFER/TRANSLATOR WITH
INTERNAL I/O TERMINATION
Precision ESYd5g8e01®1U
SY58011U
FEATURES
Precision 1:2, 400mV CML fanout buffer
Guaranteed AC performance over temperature/
voltage:
• > 7GHz fMAX clock
• < 60ps tr / tf times
• < 250ps tpd
• < 15ps max. skew
Low jitter performance:
• < 10psPP total jitter (clock)
• < 1psRMS random jitter (data)
• < 10psPP deterministic jitter (data)
Accepts an input signal as low as 100mV
Unique input termination and VT 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 × 3mm) MLF® package
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
FUNCTIONAL BLOCK DIAGRAM
Precision Edge®
DESCRIPTION
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
than 10ps(pk-pk) total jitter, the SY58011U can process clock
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
(VREF-AC) is provided to bias the VT pin. The outputs are
compatible with 400mV typical swing into 50Ω 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. Datasheets and
support documentation can be found on Micrel’s web site at
www.micrel.com.
TYPICAL PERFORMANCE
2GHz Output
VCC = 2.5V
Q0
IN
50Ω
/Q0
VT
50Ω
/IN
Q1
/Q1
VREF-AC
Precision Edge is a registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
M9999-051408
hbwhelp@micrel.com or (408) 955-1690
1
TIME (70ps/div.)
2GHz with 100mV Input
Rev.: F Amendment: /0
Issue Date: May 2008