MAX3747BEUB+T

Overview

The MAX3747BEUB+T is a multirate limiting amplifier functioning as a data quantizer for optical receivers. It operates at data rates from 155Mbps to 3.2Gbps and provides over 57dB of gain. The device features PECL-compatible differential inputs and constant-level CML outputs with an 800mV peak-to-peak swing. It includes a programmable loss-of-signal (LOS) detect function and an optional disable feature. The component operates on a single +3.3V supply, drawing approximately 26mA excluding output current, and is housed in a 10-pin µMAX package.

Feature Summary

• Pin-for-pin compatible with Micrel SY88993V
• Programmable loss-of-signal threshold with built-in hysteresis
• Output disable function for squelch implementation
• Low-power operation with high input sensitivity

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 'EUB' corresponds to the 10-pin µMAX package and industrial temperature range (-40°C to +85°C). Confirm RoHS compliance status indicated by the '+' symbol. Ensure the source documentation explicitly supports the MAX3747B variant's enhanced LOS characteristics under overload conditions compared to the MAX3747A.

Selection Notes

Select this component when designing small form-factor optical receivers requiring pin compatibility with legacy Micrel designs. The MAX3747B is preferred over the MAX3747A if enhanced loss-of-signal detection performance under input overload conditions is required. Verify that the system power supply remains within the specified 2.97V to 3.63V range for optimal electrical characteristics.

Part Context

This part belongs to the MAX3747 family of low-power SFP limiting amplifiers manufactured by Analog Devices Inc./Maxim Integrated. The family utilizes SiGe Bipolar process technology. The MAX3747B is a specific variant offering improved signal detection capabilities compared to the standard MAX3747A, while maintaining identical pinouts and form factors for direct interchangeability in existing designs.

Replacement Considerations

The datasheet confirms pin-for-pin compatibility with the Micrel SY88993V. No other substitute part numbers are documented in the provided source material.