PSB 21483 F V1.7

Telecom Overview

The PSB 21483 F V1.7, marketed as INCA-S by Infineon Technologies, is a specialized integrated circuit designed for full-featured ISDN telephony applications. It combines a C166-based 16-bit microcontroller with an Analog Front End (AFE) and a fixed-point Digital Signal Processor (DSP). The device supports full-duplex hands-free operation via a 2B+D S/T interface compliant with ITU-T I.430 standards. Key technical specifications include 4 KBytes of on-chip SRAM, a 12 Mbit/s Full-Speed USB interface adhering to USB Specification V1.1, and 15 SW-configurable endpoints. The AFE provides three differential inputs and outputs for direct connection to handsets, speakers, and headsets, supporting PCM A-Law/µ-Law and linear data formats.

Telecom Feature Summary

• Integrates a C166 CPU, DSP, and AFE for complete ISDN terminal functionality including echo cancellation and tone generation.
• Provides a full-duplex 2B+D S/T transceiver compliant with ITU-T I.430 for digital subscriber access.
• Features a 12 Mbit/s Full-Speed USB interface enabling PC host communication and unified messaging.
• Includes on-chip debug systems (OCDS), keypad scanners, LED matrix control, and PWM units.

Telecom Applications

• Full-featured ISDN phones with full-duplex hands-free operation
• Terminal equipment connecting microphone, loudspeaker, headset, and handset directly to the Analog Front End
• Devices requiring USB-to-ISDN data port connectivity or internet telephony implementation

Telecom Procurement Notes

Verify the specific revision suffix 'V1.7' against official Infineon documentation to ensure compatibility with required firmware and hardware revisions. Confirm package availability in P-TQFP-144 format. Check current product status as legacy components may have limited supply chains. Ensure sourcing from authorized distributors to guarantee authenticity and traceability for industrial or automotive-grade requirements if applicable.

Telecom Selection Notes

Select this component when designing high-end feature phones requiring integrated ISDN layer-1/layer-2 processing and USB connectivity. It is suitable for applications needing direct analog connections for multiple audio peripherals without external codec chips. Consider the C166 architecture and available SRAM size for software development constraints. Evaluate the need for onboard echo cancellation and DSP capabilities versus external processing solutions.

Telecom Part Context

The PSB 21483 belongs to the INCA-S family, representing a convergence of telecommunications interface and microcontroller technologies. It was developed to simplify the design of advanced digital telephones by consolidating transceiver, audio processing, and control functions into a single silicon solution. This integration reduces board space and component count compared to discrete implementations of similar functionality.

Telecom Replacement Considerations

No public confirmed substitute part numbers are identified in the provided documentation. As a specialized legacy ISDN codec with embedded MCU, direct pin-compatible replacements may not exist. Designers should evaluate functional equivalents that support ITU-T I.430 and USB Full-Speed interfaces, potentially requiring significant schematic and firmware redesigns.