LE87251NQCT

Telecom Overview

The LE87251NQCT is a dual-channel differential line driver designed for full-rate ADSL2+ and HDSL applications. It integrates two wideband amplifiers fabricated using HV30 Bipolar SOI process technology to minimize power consumption. The device features a fixed internal voltage gain of 13, eliminating the need for external feedback resistors. It supports dual supplies ranging from ±5 V to ±12 V or a single supply from 10 V to 24 V. Key electrical specifications include a peak output drive capability of 450 mA, a total harmonic distortion (THD) of -75 dBc at 1 MHz into a 60 Ω load, and a quiescent supply current of 4 mA per amplifier.

Telecom Feature Summary

• Dual-channel architecture with independent enable/disable logic control for each channel
• Internal fixed voltage gain of 13 simplifies circuit design by removing external feedback components
• High peak output drive capability of 450 mA suitable for driving telephone lines directly
• Low-power disable mode significantly reduces current consumption when drivers are inactive

Telecom Applications

• Dual port full rate ADSL2+ line drivers
• HDSL line drivers
• Full duplex differential line transmission systems

Telecom Procurement Notes

Verify component authenticity through authorized Microchip Technology distributors or certified agents. Confirm that the package marking matches the datasheet specifications and check for RoHS compliance documentation. Ensure the ordering suffix corresponds to the required tape and reel packaging format for automated assembly processes.

Telecom Selection Notes

Select this component for xDSL2+ applications requiring low signal distortion and high performance. Evaluate thermal management requirements as the exposed die pad must be soldered to a copper plane for heat dissipation. Verify that the system power supply range aligns with the specified ±5 V to ±12 V dual supply or 10 V to 24 V single supply options.

Telecom Part Context

This part belongs to the BD870 series of worldwide ADSL2+ dual channel line drivers originally developed by Zarlink Semiconductor. Following corporate restructuring, the product line was acquired by Microchip Technology. The LE87251 utilizes a 16-pin QFN package optimized for surface mount assembly in telecommunications equipment.

Telecom Replacement Considerations

Consult official Microchip Technology documentation for confirmed substitute part numbers within the BD870 series. Verify pin compatibility and electrical specifications before replacing existing inventory.