The LE79R241DJC is a subscriber line interface circuit (SLIC) manufactured by Microsemi Corporation (now part of Microchip Technology). SLICs are specialized integrated circuits that provide the interface between a telephone line and a private branch exchange (PBX) or central office (CO). They perform essential functions such as battery feed, overvoltage protection, ringing generation, and supervision.

Applications

• PBX systems
• Central office (CO) equipment
• Voice over IP (VoIP) gateways
• Wireless local loop (WLL) systems
• Analog telephone adapters (ATAs)

Features

• Battery feed
• Overvoltage protection
• Ringing generation
• Supervision
• Loop current control

Benefits

• Provides a complete interface to analog telephone lines
• Protects equipment from overvoltage events
• Generates ringing signals to alert subscribers
• Supervises the telephone line for off-hook and on-hook conditions
• Controls loop current to optimize voice quality

Technical Specifications

The LE79R241DJC typically operates from a -48V battery supply. It includes integrated ring generation circuitry and can provide standard or customized ring cadence patterns. The device provides overvoltage protection to withstand lightning surges and other transient voltage events. It supports various loop current settings to optimize voice quality for different loop lengths. The supervision functions detect off-hook and on-hook conditions, as well as dial tone and busy signals. The device is typically packaged in a surface mount package. It complies with industry standards for SLIC devices, such as GR-909. Detailed electrical characteristics, timing specifications, and application circuits can be found in the product datasheet. Microsemi SLICs are known for their reliability and performance in telecommunications equipment.

The LE79R241DJC SLIC is an essential component for interfacing analog telephone lines to digital systems. Its integrated features and robust design provide a complete and reliable solution for PBX systems, CO equipment, and VoIP gateways. By providing battery feed, overvoltage protection, ringing generation, and supervision functions, this SLIC ensures seamless communication between the telephone line and the host system. Its compliance with industry standards and its proven performance make it a popular choice for telecommunications equipment manufacturers.