SY58012U_07 Datasheet, PDF (1/9 Pages) Micrel Semiconductor – 5GHz, 1:2 LVPECL FANOUT BUFFER/TRANSLATOR

Micrel, Inc.
5GHz, 1:2 LVPECL FANOUT
BUFFER/TRANSLATOR
Precision Edge^®
Precision E^Sd^Y5g⁸e^0®12U
SY58012U
WITH INTERNAL INPUT TERMINATION
FEATURES
Precision 1:2, 800mV LVPECL fanout buffer
Guaranteed AC performance over temperature/
voltage:
• > 5GHz f_MAX (clock)
• < 110ps t_r / t_f times
• < 260ps 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
Outputs are 100k LVPECL compatible, 800mV swing
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
s All SONET and GigE clock distribution
s Fibre Channel clock and data distribution
s Backplane distribution
s High-end, low skew, multiprocessor synchronous
clock distribution
Precision Edge^®
DESCRIPTION
The SY58012U is a 2.5V/3.3V precision, high-speed, fully
differential 1:2 LVPECL fanout buffer. Optimized to provide
two identical output copies with less than 15ps of skew and
less than 10ps_(pk-pk) total jitter, the SY58012U can process
clock signals as fast as 5GHz or 5Gbps data.
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
(V_REF-AC) is provided to bias the V_T pin. The outputs are
100k LVPECL compatible, with extremely fast rise/fall times
guaranteed to be less than 110ps.
The SY58012U 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 faster rise/fall times, or greater bandwidth, consider
the SY58013U 1:2 fanout buffer with 400mV output swing,
or the SY58011 1:2 CML (400mV) fanout buffer. The
SY58012U 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
IN
50Ω
V_T
50Ω
/IN
V_REF-AC
2.5GHz Output
V_CC = 3.3V
Q0
/Q0
Q1
/Q1
TIME (50ps/div.)
Precision Edge is registered trademark of Micrel, Inc.
MicroLeadFrame and MLF are registered trademarks of Amkor Technology, Inc.
M9999-020207
[e-mail] or [phone]
1
2GHz with 100mV Input
Rev.: D Amendment: /0
Issue Date: February 2007