SY89852UMG-TR

Overview

The SY89852UMG-TR is a precision, high-speed differential 2:1 multiplexer designed for LVPECL applications. It operates from a 2.5V ±5% or 3.3V ±10% supply and supports clock frequencies up to 3.5GHz and data rates up to 3.2Gbps. The device features an internal 3-pin input termination architecture that accepts AC- or DC-coupled signals as small as 100mV without external level shifting. It provides low jitter performance with less than 1ps RMS random jitter and less than 10ps peak-to-peak total jitter. The output delivers typical 800mV LVPECL swing with rise/fall times under 180ps. Power consumption is typically 58mW at 2.5V nominal with no load.

Feature Summary

• Features a unique patent-pending 3-pin input termination architecture allowing direct interface to AC- or DC-coupled differential signals without external termination networks.
• Provides ultra-low jitter performance suitable for high-speed clock distribution and data stream processing.
• Includes an internal 25kΩ pull-up resistor on the SEL pin to define a default logic HIGH state when left open.

Applications

• Redundant clock distribution
• SONET/SDH clock and data distribution
• Fibre Channel distribution

Procurement Notes

Verify component authenticity through authorized Microchip Technology distributors or official channels. Confirm package marking matches the '852U' designation with bar-line designator. Ensure compliance with RoHS and Pb-Free specifications. Check for moisture sensitivity handling requirements prior to assembly.

Selection Notes

Select this component for applications requiring low power consumption and precise signal routing in high-speed environments. The integrated input termination simplifies board layout by eliminating external resistor networks. Verify compatibility with system voltage levels of 2.5V or 3.3V before integration.

Part Context

This part belongs to Micrel's Precision Edge product line, now under Microchip Technology. It serves as a specialized solution for differential signal multiplexing where signal integrity and low jitter are critical. The QFN-16 package offers a compact footprint for dense PCB layouts.

Replacement Considerations

The datasheet identifies the EP58 as a comparable alternative but notes the SY89852U as a superior option. No other specific replacement part numbers are explicitly confirmed in the provided documentation.

FAQ

How does the device handle open inputs?

The IN input pair defaults to an indeterminate state if left open. The SEL pin includes an internal 25kΩ pull-up resistor, causing it to default to a logic HIGH state if unconnected.

What types of input signals are supported?

The device supports AC-coupled and DC-coupled differential signals including CML, PECL, and LVDS formats, accepting swings as small as 100mV (200mV pp).