MAX3265CUB+

Overview

The MAX3265CUB+ is a +3.0V to +5.5V, 2.5Gbps limiting amplifier designed for Gigabit Ethernet and Fibre Channel optical receiver systems. It accepts a wide range of input voltages and provides constant-level output voltages 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. Key specifications include low deterministic jitter, programmable loss-of-signal indication, and an optional squelch function.

Feature Summary

• Provides CML data outputs suitable for GBIC receivers
• Includes RMS power detectors with programmable loss-of-signal indication
• Features an optional squelch function that mutes the data output signal when input voltage falls below a threshold

Applications

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

Procurement Notes

Verify the component matches the exact part number MAX3265CUB+. Confirm the package type is 10-pin µMAX-EP and the temperature range is 0°C to +70°C. Ensure the suffix '+' indicates a lead-free package compliant with RoHS standards. Cross-reference the manufacturer details with Analog Devices Inc./Maxim Integrated to confirm authenticity.

Selection Notes

Select this component for applications requiring 2.5Gbps data rates with CML outputs. It is suitable for small-form-factor receivers where space is limited. Consider the internal connection of the LEVEL pin to ground, which sets the output current to approximately 20mA. Verify compatibility with the required input signal levels and termination requirements for the specific system design.

Part Context

This part belongs to the MAX3264/MAX3265/MAX3268/MAX3269/MAX3765/MAX3768 family of limiting amplifiers. While other variants offer PECL outputs or different data rates, the MAX3265 specifically provides 2.5Gbps performance with CML outputs. It shares functional similarities with the MAX3264 but operates at a higher speed and utilizes a smaller 10-pin µMAX package compared to the 16-pin TSSOP options.

Replacement Considerations

Public confirmed substitute part numbers: MAX3265CUE+, MAX3265EUE+, MAX3765CUB+

FAQ

How is the squelch function configured on the MAX3265CUB+?

In the 10-pin µMAX package of the MAX3265, the SQUELCH function is left internally unconnected.

What is the default output current level for the CML outputs?

When the LEVEL pin is not connected, the CML output current is approximately 16mA. Connecting LEVEL to ground increases it to approximately 20mA.