SY58611U Datasheet, PDF (1/13 Pages) Micrel Semiconductor – 3.2Gbps Precision, LVDS 2:1 MUX with Internal Termination and Fail Safe Input

SY58611U
3.2Gbps Precision, LVDS 2:1 MUX with
Internal Termination and Fail Safe Input
General Description
The SY58611U is a 2.5V, high-speed, fully differential
LVDS 2:1 MUX capable of processing clocks up to
2.5GHz and data up to 3.2Gbps. SY58611U is
optimized to provide a buffered output of the selected
input with less than 20ps of skew and less than 10ps_pp
total jitter. Patented MUX Isolation design reduces
crosstalk and provides superior signal integrity.
The differential inputs include 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_PK (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 output is LVDS compatible, with rise/fall
times guaranteed to be less than 120ps.
The SY58611U operates from a 2.5V ±5% supply and is
guaranteed over the full industrial temperature range
(–40°C to +85°C). For applications that require CML or
LVPECL output, consider the SY58609U and
SY58610U, 2:1 MUX with 400mV and 800mV output
swings respectively. The SY58611U 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^®
• Selects between two sources and provides buffered
copy of the selected input signal
• Fail Safe Input
– Prevents output from oscillating when input is
invalid or removed
• Guaranteed AC performance over temperature and
voltage:
– DC-to > 3.2Gbps throughput
– <420ps typical propagation delay (IN-to-Q)
– <120ps rise/fall times
• Unique, patented internal termination and VT pin
accepts DC- and AC-coupled inputs (CML, PECL,
LVDS)
• 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
• 2.5V ±5% power supply operation
• Industrial temperature range: –40°C to +85°C
• Available in 16-pin (3mm x 3mm) MLF^® package
Applications
• All SONET clock distribution
• Fibre Channel clock and data distribution
• Gigabit Ethernet clock or data distribution
• Backplane distribution
Markets
• DataCom and Telecom
• Storage
• ATE
• Test and Measurement
Precision Edge is a registered trademark of Micrel, Inc.
MLF and MicroLeadFrame are registered trademarks of Amkor Technology.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
March 2007
M9999-030607-A
[e-mail] or [phone]