GN1157-INTE3Z

Overview

The GN1157-INTE3Z is a multi-rate transceiver IC designed for data communication and telecommunications applications. It features a transmitter DFB/FP laser driver supporting data rates from 1.0 Gbps to 11.3 Gbps. The device operates on a single 3.3 V power supply with a typical operating current of 120 mA and power dissipation of 185 mW. It is housed in a 28-pin, 4 mm x 4 mm QFN package. The GN1157-INTE3Z variant specifically utilizes reel packaging containing 2500 units per reel.

Feature Summary

• Integrates an automatic power control loop to adjust bias current for compensating laser aging and environmental changes
• Features programmable equalization to optimize jitter performance
• Includes Tx outputs with adjustable rise and fall times for optimization across different bit rates
• Compatible with external microcontroller lookup tables for controlling modulation current and extinction ratio

Applications

• Data center optical interconnects
• Telecommunications infrastructure
• Long-reach (LR) optical modules

Procurement Notes

Verify component authenticity through authorized Semtech channels or certified distributors. Confirm the specific INTE3Z suffix indicates reel packaging. Check for end-of-life status as the product may be obsolete. Ensure RoHS compliance documentation matches the manufacturing batch. Validate that the 28-pin QFN footprint aligns with the target PCB design requirements before finalizing procurement.

Selection Notes

Select this component for designs requiring integrated laser driving and reception within a compact form factor. It is suitable for systems needing multi-rate support up to 11.3 Gbps without external microprocessor intervention for basic power control. Consider the 185 mW power dissipation for thermal management strategies. Verify compatibility with the intended laser diode type, such as DFB or FP lasers, for optimal optical performance.

Part Context

The GN1157 belongs to Semtech’s GN11 series of laser drivers and transceivers. This family utilizes advanced SiGe BiCMOS and CMOS technologies to deliver high-performance optical solutions. The series targets low-cost, high-speed optical communications systems for data centers and access networks. The GN1157 specifically addresses long-reach applications with integrated diagnostics and control capabilities.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. The GN1159 is a related multi-rate LR transceiver chip but includes digital diagnostics and supports up to 12.5 Gbps. Designers should consult Semtech directly for current lifecycle status and potential alternative components.