PEF 20450 H V1.3

Telecom Overview

The Infineon PEF 20450 MTSI is a Switching IC (SWITI) designed for telecommunication and data communication applications. It provides a switching capacity of 512 connections between different buses, supporting 16 PCM Highways for input and output. The device features programmable data rates of 2.048 Mbit/s, 4.096 Mbit/s, 8.192 Mbit/s, and 16.384 Mbit/s on a per-stream basis. It supports constant delay or minimum delay configurations, subchannel switching (1-bit to 8-bit), broadcast capabilities, and multipoint switching. The component includes an on-chip PLL, JTAG interface, GPIO port, and operates with a 3.3 V power supply while maintaining 5 V tolerant inputs/outputs.

Telecom Feature Summary

• Supports flexible data rates from 2.048 Mbit/s to 16.384 Mbit/s with automatic adaptation.
• Enables precise timing control through programmable constant or minimum delay modes.
• Facilitates complex routing via subchannel switching, broadcast, and multipoint capabilities.
• Integrates comprehensive diagnostic and configuration interfaces including JTAG and µP support.

Telecom Applications

• Conventional PBX systems
• Central office switching applications
• Mobile base stations
• DECT systems
• Computer telephony integration

Telecom Procurement Notes

Verify the specific revision level against the latest official documentation before implementation. Confirm that the P-MQFP-100-2 package outline matches the target PCB footprint requirements. Ensure the design accounts for the 3.3 V power supply domain and 5 V I/O tolerance specifications defined in the electrical characteristics section.

Telecom Selection Notes

Select the PEF 20450 when a switching capacity of 512 connections is sufficient for the application architecture. Consider alternative family members like the PEF 20470 or PEF 24470 if higher connection counts are required. Evaluate the need for H.100/H.110 interfaces, which are exclusive to the HTSI sub-family, as this MTSI variant does not include them.

Telecom Part Context

The PEF 20450 belongs to the SWITI family's MTSI sub-group, specifically engineered for standard switching tasks without high-speed protocol interfaces. It serves as a foundational component for traditional telecommunications infrastructure, offering a cost-effective solution for managing PCM bus traffic in legacy and modern hybrid switching environments.

Telecom Replacement Considerations

Direct functional replacements within the same package and pinout include the PEF 20470 and PEF 24470, provided the system requires higher connection capacities. For applications needing H.100/H.110 compliance, the HTSI variants must be selected instead, though they differ in interface capabilities rather than physical form factor.