The PEB2256HV21 is an ISDN Subscriber Access Controller (ISAC-S) manufactured by Infineon Technologies. This device is designed to provide integrated digital network access for subscriber premises equipment. It offers a comprehensive set of features for handling ISDN Basic Rate Access (BRA) applications, integrating voice and data communication over a single line.

Applications

• ISDN Telephones
• ISDN Terminal Adapters
• PC ISDN Cards
• Small Business PBX Systems

Features

• Full-duplex transmission at 144 kbit/s (2B+D channels)
• HDLC frame handling for D-channel signaling
• Integrated S/T interface transceiver
• On-chip PCM codec and filters for voice digitization
• Microcontroller interface for configuration and control
• Power-down modes for energy saving
• Loopback test capabilities

Benefits

• Simplified ISDN terminal design
• Reduced component count and board space
• Lower system cost
• Improved voice quality
• Enhanced data communication reliability
• Low power consumption

Technical Specifications

The PEB2256HV21 supports the standard ISDN Basic Rate Interface (BRI) and features an integrated S/T interface transceiver compliant with ITU-T I.430. It provides two 64 kbit/s B-channels for voice or data and one 16 kbit/s D-channel for signaling. The device incorporates a PCM codec and filters for voice digitization, ensuring high-quality voice communication. It includes HDLC frame handling for D-channel signaling, supporting various ISDN protocols. The PEB2256HV21 operates from a single 5V power supply and includes power-down modes to minimize energy consumption. It is typically packaged in a PQFP (Plastic Quad Flat Package).

The microcontroller interface allows for flexible configuration and control of the device, enabling customization for different applications. Loopback test capabilities simplify system testing and diagnostics. Overall, the PEB2256HV21 provides a cost-effective and feature-rich solution for ISDN terminal equipment, offering reliable and high-performance communication capabilities.