SY89543LMI

Signal Switches, Multiplexers, Decoders Overview

The SY89543LMI is a dual, differential 2:1 LVDS multiplexer operating at data rates up to 3.2Gbps with a 3.3V supply. It features internal input termination accessible via VT pins for AC/DC coupling flexibility. Key electrical parameters include a propagation delay of less than 510ps and output rise/fall times under 150ps. Jitter performance includes less than 1ps RMS random jitter and less than 10ps peak-to-peak deterministic jitter. The device operates within a temperature range of -40°C to +85°C and is housed in a 32-pin MLF package.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual 2:1 multiplexing architecture with guaranteed AC performance across temperature and voltage ranges
• Unique internal input termination network accessible through VT pins supporting both AC-coupled and DC-coupled interfaces
• Ultra-low jitter design minimizing crosstalk-induced noise and ensuring signal integrity at high speeds
• CMOS/TTL compatible select inputs with internal pull-up resistors for simplified control logic integration

Signal Switches, Multiplexers, Decoders Applications

• Redundant clock and data switchover systems
• SONET/SDH multi-channel selection applications
• Fiber Channel interconnects
• Gigabit Ethernet implementations

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the ordering suffix matches the required lead finish; MI indicates Sn-Pb while MG denotes Pb-Free NiPdAu. Confirm the package type is MLF-32 and the operating temperature range covers industrial specifications. Ensure the datasheet revision aligns with current design requirements. Check for specific tape and reel availability if automated assembly is planned. Validate RoHS compliance status based on the selected variant.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for applications requiring low jitter differential signal routing at 3.2Gbps. Consider the SY89542U if a 2.5V supply is necessary instead of 3.3V. Evaluate the SY89545L or SY89547L if four inputs are needed rather than two. Ensure PCB layout supports the exposed pad thermal management requirements of the MLF package. Verify interface compatibility with LVDS, LVPECL, or CML sources using the internal termination features.

Signal Switches, Multiplexers, Decoders Part Context

The SY89543L belongs to Micrel's Precision Edge product family, designed for high-speed differential signaling. It complements other devices like the SY89542U and SY89545L within the same series. The device addresses needs for clean, stub-free interfaces in telecommunications and networking equipment. Its design focuses on minimizing external component count through integrated termination networks.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The SY89542U serves as a direct functional substitute for 2.5V operation environments.

Signal Switches, Multiplexers, Decoders FAQ

How does the device handle unused differential input pairs?

Unused differential input pairs should be terminated by connecting one input to VCC and the complementary input to GND through a 1kΩ resistor, leaving the corresponding VT pin open.

What types of input signals are supported by the internal termination?

The unique input termination and VT pin configuration allow the device to accept both AC-coupled and DC-coupled inputs, including LVDS, LVPECL, and CML standards.