MAX3643ETG+T

Overview

The MAX3643ETG+T is a burst-mode laser driver designed for Passive Optical Network (PON) Optical Network Terminal (ONT) modules. It supports data rates from 155 Mbps to 2.5 Gbps, accommodating GPON, GEPON, and 10G PON standards. The device operates on a single 3V to 3.6V supply voltage within an industrial temperature range of -40°C to +85°C. It features a 24-pin TQFN package with dimensions of 4mm x 4mm. Key electrical parameters include a modulation current range of 10mA to 85mA and a bias current range of 1mA to 70mA. The output conversion time is specified at 45ps.

Feature Summary

• Supports high-speed differential LVPECL inputs for data and burst enable signals
• Enables full dark-to-bright switching in 2ns via fast differential burst control
• Integrates monitor diode sample-and-hold circuitry for automatic power control
• Reduces currents to 5µA when burst enable signal is inactive

Applications

• GPON ONT modules
• IEEE EPON ONT modules
• 10G PON system transmitters

Procurement Notes

Verify component status as the MAX3643 series is designated as obsolete by the manufacturer. Confirm availability through authorized distributors or secondary markets. Ensure the specific suffix matches required packaging. Validate RoHS compliance documentation prior to integration into new designs due to end-of-life status.

Selection Notes

Select this component for legacy PON ONT designs requiring integrated APC/AMC support. It is suitable for applications needing low-cost microcontroller-based control loops. Consider alternative drivers for new designs due to obsolescence. Verify compatibility with LVPECL logic levels and thermal requirements of the 24-TQFN package.

Part Context

This part belongs to the Maxim Integrated laser driver family optimized for optical networking. It specifically targets the ONT side of PON architectures. The device simplifies design by integrating reference voltage generation and monitoring circuits. It replaces discrete solutions for bias and modulation control in fiber optic transceivers.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.