SY89473UMG Microchip

SY89473U Precision LVPECL 2:1 Multiplexer with 1:2 Fanout and Internal Termination General Description The SY89473U is a 2.5V/3.3V precision, high-speed 2:1 differential MUX capable of processing clocks up to Precision Edge 2.5GHz and data up to 2.5Gbps. The differential input includes Micrels unique, 3-pin Features input termination architecture that directly interfaces to Selects between two input channels and provides two any differential signal (AC- or DC-coupled) as small as copies of the selected output 100mV (200mV ) without any level shifting or PP Guaranteed AC performance over temperature and termination resistor networks in the signal path. The supply voltage: output is 800mV, 100K-compatible, LVPECL with fast rise/fall times guaranteed to be less than 190ps. - DC to 2.5Gbps data throughput The SY89473U operates from a 2.5V 5% or 3.3V - DC to 2.5GHz f (clock) MAX 10% supply and is guaranteed over the full industrial - <500ps In-to-Out t pd temperature range of 40C to +85C. The SY89473U is - <190ps t /t r f part of Micrels high-speed, Precision Edge product - <20ps Output-to-output skew line. For multiple-clock switchover solutions, please refer Unique patented input isolation design minimizes to the SY89840SY89843U family. crosstalk All support documentation can be found on Micrels web Ultra-low Jitter Design: site at: www.micrel.com. - <1ps random jitter RMS - <1ps cycle-to-cycle jitter RMS - <10ps total jitter (clock) PP Functional Block Diagram - <0.7ps crosstalk induced jitter RMS Unique patent-pending input termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS) 800mV (100K) LVPECL output swing 2.5V 5% or 3.3V 10% supply voltage -40C to +85C industrial temperature range Available in 24-pin (4mm x 4mm) QFN package Applications Clock switchover Data distribution Markets LAN/WAN Enterprise servers ATE Test and measurement 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. SY89473U (1) Ordering Information Operating Lead Part Number Package Type Package Marking Range Finish NiPdAu SY89473UMG QFN-24 Industrial 473U with Pb-Free bar-line indicator Pb-Free NiPdAu (2) SY89473UMGTR QFN-24 Industrial 473U with Pb-Free bar-line indicator Pb-Free Notes: 1. Contact factory for die availability. Dice are guaranteed at T = 25C, DC Electricals Only. A 2. Tape and Reel. Pin Configuration 24-Pin QFN M9999-052207-B May 2007 2 hbwhelp micrel.com or (408) 955-1690