MAX3765CUB+T

Overview

The MAX3765CUB+T is a +3.0V to +5.5V, 2.5Gbps limiting amplifier designed for Gigabit Ethernet and Fibre Channel optical receiver systems. It accepts wide input voltage ranges and provides constant-level outputs with controlled edge speeds. The device features current-mode logic (CML) data outputs tolerant of inductive connectors and is housed in a 10-pin µMAX package with an exposed paddle. Additional capabilities include RMS power detectors with programmable loss-of-signal indication and an optional squelch function.

Feature Summary

• Provides low deterministic jitter performance suitable for high-speed serial data applications
• Integrates RMS power detection with programmable loss-of-signal indication thresholds
• Features an optional squelch function that mutes data output signals when input voltage falls below a programmable threshold

Applications

• Gigabit Ethernet Optical Receivers
• Fibre Channel Optical Receivers
• System Interconnect
• ATM Optical Receivers

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm lead-free status and temperature range specifications. Ensure compatibility with existing board layouts regarding the 10-pin µMAX package dimensions and exposed paddle grounding requirements for proper thermal performance.

Selection Notes

Select this component for designs requiring CML outputs in compact form factors. Verify that the system operates within the specified supply voltage range and that the input signal characteristics align with the device's differential input resistance and voltage limits for optimal jitter performance.

Part Context

This device belongs to a family of limiting amplifiers including the MAX3264, MAX3265, MAX3268, MAX3269, and MAX3768. While sharing similar core architectures and operating principles, each variant differs in data rate support, output interface type (CML or PECL), and physical package configuration to suit specific receiver module requirements.

Replacement Considerations

Official confirmed substitute part numbers are not provided in the source material.

FAQ

How is the loss-of-signal threshold programmed?

The loss-of-signal threshold is programmed by connecting an external resistor from the TH pin to ground.

What is the function of the LEVEL pin on the MAX3765CUB+T?

On the MAX3765CUB+T, the LEVEL pin is internally connected to ground, setting the CML output current to approximately 20mA.