MAX9389EHJ+T

Overview

The MAX9389EHJ+T is a fully differential, high-speed, low-jitter 8-to-1 ECL/PECL multiplexer with dual output buffers. It operates on a supply voltage range of 2.375V to 5.5V and features a typical propagation delay of 310ps and maximum output-to-output skew of 30ps. The device supports a guaranteed operating frequency of 2.7GHz with 0.3ps RMS random jitter. It includes three single-ended select inputs compatible with ECL/PECL logic and provides internal biasing for unused inputs. The component is housed in a 32-pin TQFP package and functions within an extended temperature range of -40°C to +85°C.

Feature Summary

• Fully differential architecture designed for clock and data distribution applications
• Internal pulldowns ensure low default state when select inputs are left open
• Integrated reference outputs allow configurable single-ended input operation
• High electrostatic discharge protection rating for robust signal integrity

Applications

• Central-office backplane clock distribution
• DSLAM/DLC systems
• High-speed telecom and datacom applications

Procurement Notes

Verify the specific suffix EHJ confirms the 32-pin TQFP package variant. Confirm RoHS compliance status through official manufacturer documentation. Ensure the ordering code matches the required temperature grade and packaging specifications before procurement.

Selection Notes

Select this component for designs requiring low jitter and high-speed switching between multiple differential sources. Verify that the system power supply falls within the specified 2.375V to 5.5V range. Ensure PCB layout accommodates the 32-pin TQFP footprint and maintains differential trace impedance.

Part Context

This part belongs to the MAX9389 series of analog crosspoint switches and multiplexers manufactured by Analog Devices Inc./Maxim Integrated. It serves as a specialized solution for routing high-frequency signals in telecommunications infrastructure where signal integrity and precise timing are critical requirements.

Replacement Considerations

The MAX9389ETJ is a future product offering identical electrical characteristics but utilizes a 32-pin Thin QFN package instead of the TQFP form factor.