LE58QL021FJC

Telecom Overview

The LE58QL021FJC is a Quad Low Voltage Subscriber Line Audio-Processing Circuit (QLSLAC) manufactured by Microchip Technology. It integrates four independent codec and filter channels for telephone switch line cards. The device operates on 3.3 V CMOS technology with 5-V tolerant digital inputs. It supports single PCM highway architecture with five programmable I/O pins. The component utilizes advanced submicron CMOS processes to provide software-configurable audio processing functions, including transhybrid balancing and equalization.

Telecom Feature Summary

• Performs codec and two-to-four-wire conversion functions using digital filters for voice signal band limiting.
• Features software-programmable parameters including SLIC input impedance, transhybrid balance, transmit/receive gains, and equalization.
• Supports A-law, µ-law, or linear coding formats with optional supervision on the PCM highway.
• Includes a Real Time Data register with interrupt capability and supports multiplexed SLIC device outputs.

Telecom Applications

• Codec function on telephone switch line cards
• Subscriber line interface circuitry in telecommunications equipment
• Software-configurable solutions for BORSCHT functions when paired with SLIC devices

Telecom Procurement Notes

Verify the specific ordering suffix 'FJC' corresponds to the 44-pin PLCC tube packaging configuration as defined in the official datasheet. Confirm that the component meets RoHS Directive 2002/95/EC requirements for environmental compliance before integration into final assemblies.

Telecom Selection Notes

Select this model for designs requiring a single PCM highway interface combined with five programmable I/O pins. Ensure the system architecture accommodates the 44-pin PLCC package format. Verify compatibility with existing Legerity SLAC device coefficients if migrating from previous generations.

Telecom Part Context

This component belongs to the Le58QL02/021/031 QLSLAC family, which are based on the proven design of Legerity’s reliable SLAC device families. The Le58QL021 variant specifically distinguishes itself within the series by offering a single PCM highway configuration alongside five programmable I/O capabilities, differentiating it from dual-highway or fewer-I/O counterparts.

Telecom Replacement Considerations

The LE58QL021FJC is software and coefficient compatible with the Le79Q02/021/031 QSLAC device. Designers may consider these variants for direct functional replacement while maintaining existing filter coefficients and programming structures.