MAX3747AEUB+T

Overview

The MAX3747AEUB+T is a multirate limiting amplifier designed for optical receivers, operating from 155Mbps to 3.2Gbps. It features PECL-compatible differential inputs and provides constant-level CML outputs with an 800mV peak-to-peak swing. The device includes a programmable loss-of-signal (LOS) detect function and an optional disable feature for squelch implementation. It operates on a single +3.3V supply with a typical current of 18mA excluding output current. The component is housed in a 10-pin µMAX package and supports an industrial temperature range of -40°C to +85°C.

Feature Summary

• Pin-for-pin compatible with Micrel SY88993V
• Programmable loss-of-signal threshold with built-in hysteresis
• Optional disable function for static output control
• High gain exceeding 57dB with low 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 lead-free/RoHS compliance status. Confirm the 'A' variant designation against the datasheet to ensure correct LOS behavior specifications relative to the 'B' variant. Check for any recent obsolescence notices or lifecycle changes from Analog Devices. Ensure the ordering code matches the exact thermal and electrical ratings required for the target application environment.

Selection Notes

Select this component when designing optical transceivers requiring pin compatibility with legacy Micrel designs. Choose the MAX3747AEUB+T for applications needing a programmable LOS threshold via external resistors. Consider the MAX3747BEUB+T if enhanced LOS operation under overload conditions is required. Evaluate the low power consumption and small form factor for space-constrained SFP modules.

Part Context

This part belongs to the MAX3747 family of low-power SFP limiting amplifiers manufactured by Analog Devices Inc./Maxim Integrated. It serves as a data quantizer for synchronous optical networks and high-speed serial links. The device integrates offset correction and a multistage amplifier to handle wide input voltage ranges while maintaining signal integrity at high data rates.

Replacement Considerations

The MAX3747AEUB+T is pin-for-pin compatible with the Micrel SY88993V. Designers may also consider the MAX3747BEUB+T for similar functionality with enhanced LOS performance under overload conditions.