SY89465UMY

SY89465U Precision LVDS 1:10 Fanout with 2:1 Runt Pulse Eliminator MUX and Internal Termination General Description The SY89465U is a low-jitter, 1:10 LVDS fanout buffer with a 2:1 differential input multiplexer (MUX) optimized for redundant source switchover Precision Edge applications. Unlike standard multiplexers, the Features SY89465Us 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or runt pulses during Selects between two sources, and provides 10 switchover. In addition, a unique Fail-Safe Input precision LVDS copies (FSI) protection prevents metastable conditions Guaranteed AC performance over temperature and when the selected input clock fails to a DC voltage supply voltage: (voltage between the pins of the differential input Wide operating frequency: 1kHz to >1.5GHz drops below 100mV). <1200ps In-to-Out t pd The differential input includes Micrels, 3-pin internal <220ps t /t r f termination architecture that allows customers to Unique, patent-pending input isolation design interface to any differential signal (AC- or DC- minimizes adjacent channel crosstalk coupled) as small as 100mV (200mV ) without any PP level shifting or termination resistor networks in the Fail-Safe Input prevents oscillations signal path. The outputs are LVDS-compatible with Ultra-low jitter design: fast rise/fall times guaranteed to be less than 220ps. phase jitter (typical) 183 fs RMS The SY89465U operates from a 2.5V 5% supply <0.7ps MUX crosstalk-induced jitter RMS and is guaranteed over the full industrial Unique patented input termination and VT pin accepts temperature range of 40C to +85C. The DC- and AC-coupled inputs (CML, PECL, LVDS) SY89465U is part of Micrels high-speed, Precision 325mV LVDS output swing product line. Edge 2.5V 5% supply voltage All support documentation can be found on Micrels 40C to +85C industrial temperature range web site at: www.micrel.com. Output enable Available in 44-pin (7mm x 7mm) QFN package Applications Redundant clock switchover Fail-safe clock protection 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. SY89465U Typical Application Simplified Example Illustrating Runt Pulse Eliminator (RPE) when Primary Clock Fails Ordering Information Part Number Package Type Operating Range Package Marking Lead Finish SY89465U with Matte-Sn SY89465UMY QFN-44 Industrial Pb-Free bar-line Indicator Pb-Free SY89465U with Matte-Sn (2) SY89465UMYTR QFN-44 Industrial 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. August 2010 2 M9999-080510-C hbwhelp micrel.com or (408) 955-1690