PSB 21553 E V1.4

Telecom Overview

The PSB 21553 E is an INCA-IP VoIP System on a Chip designed for digital telephones. It integrates voice codecs, echo cancellation, and a telephony AFE with a 100 mW driver. The device includes a 100 MHz OAK subsystem with 116 Kbytes RAM and 108 Kbytes ROM, alongside a MIPS32 4Kc RISC CPU with MMU and cache controllers. Connectivity features two 10/100BaseT Ethernet ports with integrated MAC and PHY, supporting a 3-port switch with packet prioritization. Additional interfaces include keypad support for up to 91 keys, LED driving for 24 LEDs, SSC, SPI, and RMII.

Telecom Feature Summary

• Integrated voice processing capabilities including full duplex hands-free functions, noise suppression, and acoustic echo cancellation.
• Dual 10/100BaseT Ethernet ports with embedded packet buffer and IEEE 802.1Q/p compliance for Quality of Service.
• Comprehensive security support for DES, 3DES, and AES standards within the single-chip solution.

Telecom Applications

• VoIP Telephone
• Digital Telephones

Telecom Procurement Notes

Verify the specific ordering code PSB21553E against current Infineon documentation to confirm availability and package details. Ensure compatibility with the required P-LBGA-324-3 housing. Cross-reference technical specifications with the official product brief to validate interface requirements and software support packages before procurement.

Telecom Selection Notes

Select this component for applications requiring a cost-optimized single-chip VoIP solution. It is suitable for terminal systems utilizing microphone, loudspeaker, handset, or headset inputs. Consider the integrated 100 mW speaker driver and extensive connectivity options when designing the audio and network architecture.

Telecom Part Context

The PSB 21553 E belongs to Infineon’s INCA-IP family of advanced telephony products. This series targets digital telephone markets with integrated solutions combining DSP, CPU, and networking capabilities. The component represents a consolidated approach to IP telephony hardware design.

Telecom Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult Infineon directly for potential alternative components within the INCA-IP family or updated generations.