STLC3080

Telecom Overview

The STLC3080 is a single-chip Subscriber Line Interface Circuit (SLIC) designed for public, transmission, and private telephone applications. It implements the complete BORSHT function suite within a TQFP44 surface-mount package. The device operates with a +5V supply and supports an operating temperature range of -40°C to +85°C. Key electrical parameters include a battery voltage tolerance up to -78V, a limiting current programmable between 20mA and 50mA via external resistors, and a maximum power dissipation of 1.1W at 70°C ambient. It features dual control modes: Slave Mode and Automatic Activation Mode.

Telecom Feature Summary

• Implements full BORSHT functionality including battery feed, overvoltage protection, ringing, supervision, hybrid connection, and test capabilities.
• Supports dual control configurations allowing selection between Slave Mode and Automatic Activation Mode for flexible system integration.
• Features soft battery reversal with programmable transition time and integrated ring trip detection with automatic synchronization.
• Includes three internal relay drivers for ringer and testing functions, eliminating the need for external kick-back diodes.

Telecom Applications

• Central Office (CO) subscriber line interfaces
• Digital Loop Carrier (DLC) transmission systems
• Private Automatic Branch Exchange (PABX) telephony equipment

Telecom Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment prior to assembly. Check for obsolete status indicators as this part may be superseded by newer generations. Ensure compliance with RoHS directives if required for specific regional deployments.

Telecom Selection Notes

Select the STLC3080 when a monolithic SLIC solution is required for standard telephone line interfacing. Consider the TQFP44 package constraints and thermal resistance characteristics for PCB layout. Evaluate external component requirements for impedance synthesis and protection circuits against lightning or power cross events.

Telecom Part Context

This component belongs to the family of subscriber line interface circuits developed using BCD technology. It integrates high-voltage and low-voltage processes to handle telephone line signals efficiently. The design focuses on reducing discrete component count while maintaining robust performance in harsh electrical environments typical of telecommunications infrastructure.

Telecom Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing control logic and external transistor specifications if considering alternative SLIC devices from other manufacturers.