The LE9541DUQC is a low-power, single-channel SLIC (Subscriber Line Interface Circuit) with integrated DC-DC converter, designed for VoIP (Voice over Internet Protocol) applications. Manufactured by Microsemi (now part of Microchip Technology), it provides the necessary interface between a digital telephone system and an analog telephone line. This device offers features such as battery feed, ringing generation, and supervision functions, all while consuming minimal power.

Applications

• VoIP Gateways
• IP Phones
• FXS Ports (Foreign Exchange Station)
• Wireless Routers with integrated telephony
• Central Office (CO) Line Cards

Features

• Single-Channel SLIC: Provides interface for one analog telephone line.
• Integrated DC-DC Converter: Generates the required battery voltage from a lower supply voltage.
• Low Power Consumption: Optimizes power efficiency for reduced energy costs.
• Battery Feed: Provides the necessary DC voltage and current to power the telephone set.
• Ringing Generation: Generates the ringing signal to alert the subscriber of an incoming call.
• Supervision Functions: Detects on-hook/off-hook status, loop closure, and other line conditions.
• Programmable Parameters: Allows customization of various line parameters to meet specific application requirements.

Benefits

• Reduced System Cost: Integrated DC-DC converter reduces the need for external components.
• Lower Power Consumption: Minimizes energy costs and improves battery life in portable applications.
• Simplified System Design: Integrates multiple functions into a single chip, simplifying system design.
• Enhanced Reliability: Robust design ensures reliable operation in demanding environments.

The LE9541DUQC is typically packaged in a QFN (Quad Flat No-leads) package. It requires a low-voltage supply (typically 3.3V or 5V) and interfaces with a digital signal processor (DSP) or other control circuitry. The device's programmable parameters allow for customization of loop current, ringing voltage, and other line characteristics. It complies with various international standards for telephony interfaces.