SY89546UMG-TR

Signal Switches, Multiplexers, Decoders Overview

The SY89546UMG-TR is a high-speed differential multiplexer from the Precision Edge family, manufactured by Microchip Technology. It operates on a single 2.5V supply and supports data rates up to 3.2Gbps. The device features four differential LVDS inputs and provides two copies of the selected input via differential outputs. It includes internal termination accessible through VT pins for flexible AC or DC coupling. The component is housed in a 32-pin MLF package and functions within an industrial temperature range of -40°C to +85°C.

Signal Switches, Multiplexers, Decoders Feature Summary

• Selects among four differential inputs and provides two identical copies of the chosen signal
• Features unique internal input termination with VT pin access for simplified interface design
• Supports both AC-coupled and DC-coupled connections without external resistor networks
• Designed for ultra-low jitter performance to maintain signal integrity at high speeds

Signal Switches, Multiplexers, Decoders Applications

• SONET/SDH multi-channel select applications
• Fibre Channel systems
• Gigabit Ethernet (GigE) interfaces

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the specific ordering suffix matches the required packaging format, as standard variants may differ from tape and reel configurations. Confirm the lead finish specification aligns with assembly requirements, noting that Pb-Free options include a bar-line indicator. Ensure the voltage supply constraints strictly adhere to the 2.5V ±5% operating range defined in the datasheet.

Signal Switches, Multiplexers, Decoders Selection Notes

Choose this component when dual output copies are necessary from a four-input selection process. Consider the SY89547L if a 3.3V supply is required instead of 2.5V. Select the SY89544U or SY89545L if only a single differential output is needed rather than the fanout provided here. Verify compatibility with LVDS, LVPECL, or CML standards using the internal termination features.

Signal Switches, Multiplexers, Decoders Part Context

This part belongs to Micrel’s Precision Edge product line, now under Microchip Technology. It is designed for high-speed digital signal processing where low jitter and precise signal routing are critical. The device integrates complex termination networks to reduce board space and simplify layout compared to discrete solutions.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SY89547LMG-TR: 3.3V compatible version with similar functionality.

Signal Switches, Multiplexers, Decoders FAQ

How does the device handle unused differential inputs?

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 logic levels are supported for the selection inputs?

The SEL0 and SEL1 inputs are TTL/CMOS-compatible and feature internal 25kΩ pull-up resistors, defaulting to a logic HIGH state if left open.