SY58038U Ultra-Precision, 8:1 MUX with Internal Termination and 1:2 LVPECL Fanout Buffer Precision Edge General Description The SY58038U is a low-jitter, low-skew, high-speed 8:1 Precision Edge multiplexer with a 1:2 differential fanout buffer optimized for precision telecom and enterprise server distribution Features applications. The SY58038U distributes clock frequencies from DC to 3.5GHz, and data rates to 4.5Gpbs guaranteed Selects between 1 of 8 inputs, and provides two precise, over temperature and voltage. low-skew LVPECL output copies Ultra-low jitter design: The SY58038U differential input includes Micrels unique, 3-pin input termination architecture that directly interfaces 72fs phase jitter (typical) rms to any differential signal (AC- or DC-coupled) as small as Guaranteed AC performance over temperature and 100mV without any level shifting or termination resistor voltage: networks in the signal path. The outputs are 800mV, 100K DC to 4.5Gbps throughput compatible LVPECL with extremely fast rise/fall times <500ps propagation delay IN-to-Q (V > 100mV) IN guaranteed to be less than 100ps. <100ps t / t time r f The SY58038U features a patented isolation design that <15ps skew (output-to-output) significantly improves channel-to-channel crosstalk Unique, patented, channel-to-channel isolation design performance. provides superior crosstalk performance The SY58038U operates from a 2.5V 5% or 3.3V 10% Unique, patented, input termination and V pin accepts T supply and is guaranteed over the full industrial DC- and AC-coupled inputs temperature range of 40C to +85C. The SY58038U is (CML, PECL, LVDS) part of Micrels high-speed, Precision Edge product line. 800mV LVPECL output swing Datasheets and support documentation are available on Power supply 2.5V 5% or 3.3V 10% Micrels web site at: www.micrel.com. 40C to +85C temperature range Available in 44-pin (7mm 7mm) QFN package Applications Data communication systems All SONET/SDH data/clock applications All Fibre Channel applications All Gigabit Ethernet applications United States Patent No. RE44,134 Precision Edge is a registered trademark of Micrel, Inc. Micrel Inc. 2180 Fortune Drive San Jose, CA 95131 USA tel +1 (408) 944-0800 fax + 1 (408) 474-1000 Micrel, Inc. SY58038U Functional Block Diagram Truth Table SEL2 SEL1 SEL0 Q /Q L L L IN0 /IN0 L L H IN1 /IN1 L H L IN2 /IN2 L H H IN3 /IN3 H L L IN4 /IN4 H L H IN5 /IN5 H H L IN6 /IN6 H H H IN7 /IN7 March 26, 2015 Revision 3.0 2 hbwhelp micrel.com or (408) 955-1690