SY89841U

SY89841U Precision LVDS Runt Pulse Eliminator 2:1 Multiplexer General Description The SY89841U is a low jitter LVDS, 2:1 input multiplexer (MUX) optimized for redundant source switchover applications. Unlike standard multiplexers, the SY89841U unique 2:1 Runt Pulse Eliminator (RPE) MUX prevents any short cycles or “runt” pulses during switchover. In addition, a unique Fail-safe Input protection prevents metastable conditions when the selected input clock fails to a DC voltage (voltage between the pins of the differential input drops below 100mV). Precision Edge® Features Selects between two sources, and provides a glitch-free, stable LVDS output Guaranteed AC performance over temperature and supply voltage: – wide operating frequency: 1kHz to >1.5GHz – <870ps In-to-Out tpd – <150ps tr/tf The differential input includes Micrel’s unique, 3-pin Unique patent-pending input isolation design input termination architecture that allows customers minimizes crosstalk to interface to any differential signal (AC- or DC Fail-safe input prevents oscillations coupled) as small as 100mV (200mVpp) without any level shifting or termination resistor networks in the Ultra-low jitter design: signal path. The outputs are 350mV, LVDS with fast – <1psrms random jitter rise/fall times guaranteed to be less than 150ps. – <1psrms cycle-to-cycle jitter – <10pspp total jitter (clock) The SY89841U operates from a 2.5V ±5% supply www.DataSheet4U.com – <0.7psrms MUX crosstalk induced jitter and ...