SY89465U Datasheet | Micrel Semiconductor

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 applications. Unlike standard multiplexers, the SY89465Us 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or “runt” pulses during switchover. In addition, a unique Fail-Safe Input (FSI) protection prevents metastable conditions when the selected input clock fails to a DC voltage (voltage between the pins of the differential input drops below 100m V). The differential input includes Micrel’s, 3-pin internal termination architecture that allows customers to interface to any differential signal (AC- or DCcoupled) as small as 100m V (200m VPP) without any level shifting or termination resistor networks in the signal path. The outputs are LVDS-patible with fast rise/fall times guaranteed to be less than 220ps. The SY89465U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range of - 40°C to +85°C. The SY89465U is part of Micrel’s high-speed, Precision Edge® product line. All support documentation can be found on Micrel’s web site at: .micrel.. Features Precision Edge® - Selects between two sources, and provides 10 precision LVDS copies - Guaranteed AC performance over temperature and supply voltage: - Wide operating frequency: 1k Hz to >1.5GHz - <1200ps In-to-Out tpd - <220ps tr/tf - Unique, patent-pending input isolation design minimizes adjacent channel crosstalk - Fail-Safe Input prevents oscillations - Ultra-low jitter design: - 183 fs RMS phase jitter (typical) - <0.7ps RMS MUX crosstalk-induced jitter - Unique patented input termination and VT pin accepts DC- and AC-coupled inputs (CML, PECL, LVDS) - 325m V LVDS output swing - 2.5V ±5% supply voltage - - 40°C to +85°C industrial temperature range - Output enable - Available in 44-pin (7mm x 7mm) QFN...