PSB 21493 F V1.7

Telecom Overview

The Infineon PSB 21493 (INCA-P) is a single-chip solution for high-feature PBX phones, integrating a C166-based 16-bit CPU, Analog Front End (AFE), and DSP. It supports full-duplex hands-free operation with USB interface compliance to Specification V1.1. The device includes 4 KBytes of on-chip SRAM, Level 1 OCDS, and two PWM units. Audio processing features include full-duplex echo cancellation, noise reduction, tone generation, and DTMF reception. It handles PCM A-Law/µ-Law and linear data compatible with ITU-T G.712 and ETSI NET33 specifications.

Telecom Feature Summary

• Integrates subscriber access functions for digital PBX terminals via UPN Interface
• Provides complete Layer-1 and basic Layer-2 functions for digital terminals
• Supports direct connection of microphone, loudspeaker, headset, and handset to the Analog Front End
• Includes bootstrap loader function and on-chip debug system

Telecom Applications

• Feature Phone with full-duplex, hands-free operation
• Terminal equipment connecting directly to Analog Front End
• Devices requiring PC host communications via USB
• Applications where line transceiver is disabled but other functions are active

Telecom Procurement Notes

Verify component authenticity through authorized Infineon distributors or official channels. Confirm package type P-TQFP-144 matches design requirements. Check for RoHS compliance status in current documentation. Ensure supply chain stability as this is an older generation component. Request specific lot traceability if required by quality standards.

Telecom Selection Notes

Select this component for applications requiring integrated voice processing and USB connectivity in feature phones. Consider the C166 CPU performance for embedded control tasks. Evaluate the AFE capabilities for direct analog connections. Verify software support for the specified audio codecs and protocols. Assess thermal management needs for the TQFP-144 package.

Telecom Part Context

The PSB 21493 belongs to the INCA-P family, designed specifically for digital telephone terminal equipment. It consolidates multiple discrete components into a single chip to reduce board space and complexity. This integration targets cost-sensitive yet feature-rich communication devices in the enterprise and residential PBX markets.

Telecom Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Consult Infineon technical support for modern equivalents or pin-compatible alternatives if discontinuation is a concern.