SY89474UMG-TR Microchip

SY89474U Precision LVDS 2:1 Multiplexer with 1:2 Fanout and Internal Termination General Description The SY89474U is a 2.5V precision, high-speed 2:1 differential MUX capable of processing clocks up to Precision Edge 2.5GHz and data up to 2.5Gbps. Features The differential input includes Micrels unique, 3-pin input termination architecture that directly interfaces to any Selects between two input channels and provides two differential signal (AC- or DC-coupled) as small as copies of the selected input 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 325mV LVDS with fast rise/fall times guaranteed DC to 2.5Gbps data throughput to be less than 150ps. DC to 2.5GHz f (clock) MAX The SY89474U operates from a 2.5V 5% supply and is <470ps In-to-Out tpd guaranteed over the full industrial temperature range of <150ps t /t r f -40C to +85C. The SY89474U is part of Micrels high- <20ps output-to-output skew speed, Precision Edge product line. For multiple clock Unique, patent-pending input isolation design switchover solutions, please refer to the SY89840U minimizes crosstalk SY89845U family. Ultra-low jitter design: All support documentation can be found on Micrels web <1ps random jitter RMS site at: www.micrel.com. <1 deterministic jitter 0ps PP <1ps cycle-to-cycle jitter RMS <10ps total jitter (clock) Functional Block Diagram PP <0.7ps crosstalk induced jitter RMS Unique patent-pending input termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS) 325mV LVDS output swing 2.5V 5% 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. SY89474U (1) Ordering Information Part Number Package Type Operating Range Package Marking Lead Finish 474U with NiPdAu SY89474UMG QFN-24 Industrial Pb-Free bar-line indicator Pb-Free 474U with NiPdAu (2) SY89474UMGTR QFN-24 Industrial Pb-Free bar-line indicator Pb-Free Notes: 1. Contact factory for die availability. Dice are guaranteed at TA = 25C, DC Electricals Only. 2. Tape and Reel. Pin Configuration 24-Pin QFN 2 M9999-081105 August 2005 hbwhelp micrel.com or (408) 955-1690