MAX3747BEUB+

Overview

The MAX3747BEUB+ is a multirate limiting amplifier designed for optical receivers, operating from 155Mbps to 3.2Gbps. It functions as a data quantizer for SONET, Fibre-Channel, and Gigabit Ethernet applications. The device features PECL-compatible inputs and provides constant-level CML outputs with an 800mV peak-to-peak amplitude. It operates on a single +2.97V to +3.63V supply, drawing approximately 20mA excluding output current. The component includes programmable loss-of-signal detection and an optional disable function.

Feature Summary

• Pin-for-pin compatible with Micrel SY88993V
• Enhanced Loss-of-Signal (LOS) operation under overload conditions
• Programmable LOS threshold with built-in hysteresis to prevent chatter
• Optional DISABLE function for squelch implementation

Applications

• Gigabit Ethernet SFP/SFF Optical Transceiver Modules
• 1G/2G Fibre-Channel SFP/SFF Optical Transceiver Modules
• Multirate OC-3 to OC-48 FEC SFP/SFF Optical Transceiver Modules
• 10G LX4 Transceiver Modules

Procurement Notes

Verify the specific suffix BEUB+ corresponds to the -40°C to +85°C temperature range and 10-pin µMAX package. Confirm RoHS compliance status via official documentation. Ensure compatibility with existing PCB footprints designed for the Micrel SY88993V if cross-referencing. Check for any recent lifecycle changes or obsolescence notices directly from Analog Devices.

Selection Notes

Select this component when designing optical transceivers requiring high gain (>57dB) and low jitter performance up to 3.2Gbps. The MAX3747B variant is preferred over the A version for applications needing enhanced LOS behavior during signal overload. Consider the 10-pin µMAX package constraints for small form-factor receiver designs.

Part Context

Part of the MAX3747A/MAX3747B family of low-power SFP limiting amplifiers manufactured by Analog Devices Inc./Maxim Integrated. These devices are specifically engineered for high-speed optical communication systems, providing robust signal conditioning and data recovery capabilities within compact surface-mount packages suitable for dense board layouts.

Replacement Considerations

The datasheet explicitly states pin-for-pin compatibility with the Micrel SY88993V.