• Provides crosspoint switching between any input pairs to any output pair
• Patent pending, channel-to-channel isolation design provides superior crosstalk performance
• Guaranteed AC performance over temperature and voltage:
• <480ps propagation delay
• <120ps rise/fall time
• <30ps output-to-output skew
• 95fs RMS phase jitter (typ.)
• <0.7psRMS crosstalk-induced jitter
• Patent-pending 50O input termination, extended CMVR, and VT pin accepts DC- and AC-coupled differential inputs
• 350mV LVDS output swing
• Power supply 2.5V ±5%
• -40°C to +85°C temperature range
• Available in 44-pin (7mm x 7mm) QFN package
• Pb-Free Green package

The SY89540U is a low-jitter, low skew, high-speed 4x4 crosspoint switch optimized for precision telecom and enterprise server/storage distribution applications. The SY89540U guarantees data-rates up to 3.2Gbps over temperature and voltage.The SY89540U differential input includes Micrel's unique, 3-pin input termination architecture that directly interfaces to any differential signal (AC- or DC-coupled) as small as 100mV (200mVpp) without any level shifting or termination resistor networks in the signal path. The LVDS compatible outputs maintain extremely fast rise/fall times guaranteed to be less than 120ps.The SY89540U features a patent-pending isolation design that significantly improves on channel-tochannel crosstalk performance.The SY89540U operates from a 2.5V ±5% supply and is guaranteed over the full industrial temperature range (-40°C to +85°C). The SY89540U is part of Micrel's high-speed, Precision Edge® product line.