SY58609U_10 Datasheet, PDF (1/14 Pages) Micrel Semiconductor – 4.25Gbps Precision, CML 2:1 MUX with

SY58609U
4.25Gbps Precision, CML 2:1 MUX with
Internal Termination and Fail Safe Input
General Description
The SY58609U is a 2.5/3.3V, high-speed, fully
differential CML 2:1 MUX capable of processing clock
signals up to 2.5GHz and data patterns up to 4.25Gbps.
The SY58609U is optimized to provide a buffered output
of the selected input with less than 20ps of skew and
less than 10ps_pp total jitter.
The differential input includes Micrel’s unique, 3-pin
input termination architecture that interfaces to LVPECL,
LVDS or CML differential signals, (AC- or DC-coupled)
as small as 100mV (200mV_pp) without any level-shifting
or termination resistor networks in the signal path. For
AC-coupled input interface applications, an integrated
reference voltage (V_REF-AC) is provided to bias the V_T pin.
The outputs are 400mV CML, with extremely fast
rise/fall times guaranteed to be less than 90ps.
The SY58609U 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 or LVDS outputs,
consider Micrel’s SY58610U and SY58611U, 2:1 MUX
with 800mV and 325mV output swings, respectively.
The SY58609U 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.
Functional Block Diagram
Features
Precision Edge^®
• Precision 400mV CML 2:1 MUX
• Guaranteed AC performance over temperature and
voltage:
– DC-to > 4.25Gbps throughput
– <370ps propagation delay (IN-to-Q)
– <90ps rise/fall times
• Fail Safe Input
– Prevents outputs from oscillating when input is
invalid
• Unique, patented MUX input isolation design
minimizes adjacent channel crosstalk
• Ultra-low jitter design
– <1ps_RMS cycle-to-cycle jitter
– <10ps_PP total jitter
– <1ps_RMS random jitter
– <10ps_PP deterministic jitter
• High-speed CML outputs
• 2.5V ±5% or 3.3V ±10% power supply operation
• Industrial temperature range: –40°C to +85°C
• Available in 16-pin (3mm x 3mm) QFN package
Applications
• Data Distribution: OC-48, OC-48+FEC, XAUI
• SONET clock and data distribution
• Fibre Channel clock and data distribution
• Gigabit Ethernet clock and data distribution
Markets
• Storage
• ATE
• Test and measurement
• Enterprise networking equipment
• High-end servers
• Access
Precision Edge is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
August 2007
M9999-082907-C
[e-mail] or [phone]