SY58029UMG

Signal Switches, Multiplexers, Decoders Overview

The SY58029UMG is a precision, high-speed 4:1 differential multiplexer with an integrated 1:2 fanout buffer. It operates on a 2.5V ±5% or 3.3V ±10% power supply and supports data rates up to 5Gbps and clock frequencies up to 4GHz. The device features ultra-low jitter performance, including less than 10ps peak-to-peak total jitter for clocks and less than 1ps RMS random jitter. It utilizes a unique patented input termination architecture that accepts AC- or DC-coupled signals as low as 100mV without external level shifting. Outputs provide 800mV LVPECL swings with rise/fall times under 110ps. It is housed in a 32-pin MLF package.

Signal Switches, Multiplexers, Decoders Feature Summary

• Selects one of four differential inputs and provides two identical copies via an integrated 1:2 fanout buffer.
• Features a unique patented three-input termination architecture allowing direct interface to CML, LVPECL, and LVDS signals without external resistor networks.
• Delivers ultra-low jitter performance suitable for high-speed clock distribution and data streams.
• Provides internally temperature-compensated 800mV LVPECL outputs with extremely fast signal transition times.

Signal Switches, Multiplexers, Decoders Applications

• Redundant clock and/or data distribution systems
• SONET/SDH clock and data distribution networks
• Loopback testing configurations
• Fibre Channel distribution architectures
• Gigabit Ethernet clock and data distribution

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix to confirm the package type and lead finish. The 'UMG' designation indicates a Pb-Free MLF-32 package with NiPdAu leads. Confirm whether the required quantity includes tape and reel packaging by checking for the 'TR' suffix. Ensure the voltage and temperature specifications align with the target industrial application requirements before finalizing procurement.

Signal Switches, Multiplexers, Decoders Selection Notes

Choose this component when a 4:1 multiplexing function with simultaneous dual output buffering is required. Select the SY58029UMG over the SY58028U if LVPECL outputs are preferred over CML. Consider the SY58030U if lower 400mV LVPECL swing is necessary. This part is suitable for applications demanding minimal crosstalk and high-speed signal integrity across varying temperature conditions.

Signal Switches, Multiplexers, Decoders Part Context

The SY58029UMG belongs to Micrel’s Precision Edge product line, designed for high-speed digital interfaces. It is part of a family that includes variants like the SY58028U (CML outputs) and SY58030U (400mV LVPECL). The device integrates internal termination to simplify board layout and reduce component count in high-frequency designs.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Public confirmed substitutes include SY58028U for CML output requirements and SY58030U for 400mV LVPECL swing applications. Verify pin compatibility and electrical characteristics before substitution.

Signal Switches, Multiplexers, Decoders FAQ

How does the SY58029UMG handle unused differential inputs?

Unused differential input pairs should have one end connected to ground through a 1kΩ resistor and the other end left floating. Unused VT and VREF-AC pins may also be left floating.

What is the maximum operating frequency for clock signals?

The device is capable of handling clock signals up to 4GHz, while supporting data streams up to 5Gbps.

Can the SY58029UMG accept AC-coupled inputs?

Yes, the device accepts both AC- and DC-coupled differential signals. For AC-coupled inputs, the VREF-AC pin must be connected directly to the VT pin and bypassed with a 0.01µF capacitor.