MAX3269CUB+T

Overview

The MAX3269CUB+T is a +3.0V to +5.5V, 2.5Gbps limiting amplifier designed for Gigabit Ethernet and Fibre Channel optical receiver systems. It features standards-compliant positive-referenced emitter-coupled logic (PECL) data outputs and is housed in a tiny 10-pin µMAX package suitable for small-form-factor receivers. The device accepts a wide range of input voltages and provides constant-level output voltages with controlled edge speeds.

Feature Summary

• Features an RMS power detector with programmable loss-of-signal indication
• Includes an optional squelch function that mutes the data output signal when input voltage falls below a threshold
• Provides excellent jitter performance with low deterministic jitter characteristics

Applications

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

Procurement Notes

Verify the specific suffix 'CUB' corresponds to the 10-pin µMAX package with PECL outputs and 0°C to +70°C temperature range. Confirm lead-free status via the '+' designation. Check current availability as this component may be subject to limited supply or obsolescence by Analog Devices/Maxim Integrated.

Selection Notes

Select this part for applications requiring PECL outputs in a compact form factor. Ensure the system operates within the +3.0V to +5.5V supply range. Verify that the 2.5Gbps data rate meets the application requirements. Consider the exposed paddle requirement for thermal management during PCB layout.

Part Context

This component belongs to the MAX3264/MAX3265/MAX3268/MAX3269 family of limiting amplifiers from Maxim Integrated. It is specifically engineered for high-speed optical receiver front-ends. The family differentiates between CML and PECL outputs and varying data rates of 1.25Gbps and 2.5Gbps.

Replacement Considerations

Public confirmed substitutes include MAX3269CUB, MAX3768CUB, and MAX3268CUB. Verify pin compatibility and output interface type (PECL vs CML) before substitution.