SY55859LMI

Signal Switches, Multiplexers, Decoders Overview

The SY55859LMI is a dual CML 2x2 crosspoint switch optimized for high-speed data and clock applications up to 3.2Gbps or 2.7GHz. It operates from a +3.3V ±10% supply voltage within the industrial temperature range of –40°C to +85°C. The device features low jitter performance with 2ps RMS random jitter and 5ps peak-to-peak deterministic jitter, alongside 15ps channel-to-channel skew. It utilizes a 32-pin (5mm x 5mm) EPAD-QFN package.

Signal Switches, Multiplexers, Decoders Feature Summary

• Pin-for-pin, plug-in compatible with the MAX3840
• Integrated internal termination on inputs and outputs eliminates external components
• Power-saving output disable feature reduces consumption when unused
• Fast CML outputs with rise/fall times under 100ps

Signal Switches, Multiplexers, Decoders Applications

• SONET/SDH optical transport
• High-speed backplane redundancy
• Add-drop multiplexers

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the specific ordering suffix matches the required lead finish and packaging format. The 'I' suffix indicates an industrial operating temperature range and Sn-Pb lead finish. Confirm whether tape and reel packaging is needed, as this requires the 'TR' suffix in the part number. Ensure compatibility with existing PCB footprints designed for the 32-pin QFN package.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when pin-compatible replacement for the MAX3840 is required. Consider alternative models like the SY55858U if AC-coupled LVPECL input flexibility or lower voltage operation is necessary. Verify that the 3.3V supply requirement aligns with the system design constraints before finalizing the selection.

Signal Switches, Multiplexers, Decoders Part Context

This component belongs to the SuperLite family of crosspoint switches manufactured by Micrel, which was acquired by Microchip Technology. The product line focuses on high-speed signal routing solutions for telecommunications and networking infrastructure. The SY55859L specifically targets applications demanding low jitter and precise signal distribution across multiple channels.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The SY55859LMI is explicitly documented as pin-for-pin and plug-in compatible with the Maxim MAX3840EGJ.