Integrated Voice and Data Line Interface Solution with Infineon PEF24901HV2
The convergence of voice and data over a single physical line has been a cornerstone of modern telecommunications, enabling cost-effective and efficient network deployments. At the heart of such integrated systems lies the line interface, a critical component responsible for connecting subscriber equipment to the central office or PBX. The Infineon PEF24901HV2 represents a highly integrated, single-chip solution designed to master the complex challenges of this interface, providing a robust and flexible platform for next-generation communication equipment.
This device is a subscriber line interface circuit (SLIC) that seamlessly combines the traditional functions of battery feed, overvoltage protection, ringing, supervision, hybrid cancellation, and testing—often referred to as BORSHT—with advanced capabilities for data transmission. Its primary strength is its ability to handle both Pulse Code Modulation (PCM) voice channels and clear-channel data simultaneously over a common digital bus interface, making it an ideal choice for Integrated Services Digital Network (ISDN) Basic Rate Access (BRA) and voice-over-data applications.
A key architectural advantage of the PEF24901HV2 is its high level of integration. It incorporates two complete line interfaces, meaning a single chip can serve two independent subscriber lines. This drastically reduces the component count on the board, saving valuable space and lowering overall system cost and complexity. Furthermore, its low power consumption is a significant benefit for high-density line card designs where thermal management is a primary concern.
The integration extends to its robust built-in protection features. The device is designed to withstand lightning surges, power induction, and other hazardous overvoltage conditions that are common in telecommunications environments. This inherent resilience enhances system reliability and reduces the need for extensive external protection circuitry.
From a data handling perspective, the chip provides a transparent, full-duplex data path. This allows it to support clear-channel ISDN B-channel and D-channel data, facilitating services such as high-speed internet access, video conferencing, and digital telephony. The on-chip hybrid and echo cancellation circuitry ensures high-quality voice transmission by effectively isolating the transmit and receive paths and minimizing sidetone, which is crucial for maintaining clear audio fidelity.
System control and configuration are streamlined through a microprocessor interface. Developers can easily program parameters such as line termination impedance, gain settings, and ringing signals, offering tremendous flexibility to adapt the solution to various international telecommunications standards and specific application requirements.
ICGOODFIND Summary: The Infineon PEF24901HV2 stands out as a highly integrated, dual-line interface solution that powerfully converges voice and data functionalities. Its combination of robust protection, low power operation, and design flexibility makes it an exceptional choice for developers building reliable and efficient telecommunications infrastructure for digital subscriber line applications.
Keywords: Subscriber Line Interface Circuit (SLIC), Integrated Voice and Data, PEF24901HV2, PCM Interface, Overvoltage Protection.
