PEF 22504 HT V2.1

Telecom Overview

The PEF22504HTV2.1 is a Quad E1/T1/J1 Line Interface Component (QuadLIU) designed for long- and short-haul applications. It integrates four independent line interface units, each featuring receive and transmit paths with clock and data recovery, jitter attenuation, and programmable pulse shaping. The device supports asynchronous microcontroller interfaces (Intel or Motorola modes), serial interfaces (SCI, SPI), and a boundary scan interface. It operates on dual voltage supplies of 2.4 V and 4.5 V. Available in PG-TQFP-144-17 packages, it provides comprehensive error monitoring, alarm handling, and test functions including PRBS generation and loop-back capabilities.

Telecom Feature Summary

• Integrates four independent E1/T1/J1 line interface channels with built-in framer and line interface functionality.
• Supports flexible master clocking via an internal PLL and offers multiple host interface options including Intel/Motorbus, SCI, and SPI.
• Includes advanced signal conditioning features such as receive equalization, jitter attenuation, and programmable transmit pulse shaping.
• Provides extensive diagnostic and testing capabilities, including bipolar violation detection, loss-of-signal detection, and various loop-back modes.

Telecom Applications

• Long-haul and short-haul digital transmission systems
• Telecommunications network repeaters and multiplexers
• Digital cross-connect systems (DXC)
• Network monitoring and redundancy applications

Telecom Procurement Notes

Verify the specific ordering suffix to confirm package type and temperature range, as variations exist within the family. Confirm component availability status, as this model may be subject to discontinuation or limited supply constraints. Ensure compatibility with existing system voltage requirements and interface protocols before procurement.

Telecom Selection Notes

Select the PEF22504HTV2.1 when a quad-channel solution for E1, T1, or J1 interfaces is required. Consider the HT variant for specific thermal or performance characteristics if documented. Evaluate the need for integrated jitter attenuation and programmable line build-out to simplify external circuitry design compared to discrete solutions.

Telecom Part Context

This component belongs to Infineon's QuadLIU product family, which consolidates framer and line interface unit functions into a single integrated circuit. The version 2.1 designation indicates a specific hardware revision with updated features or pin configurations compared to earlier iterations. It serves as a key building block for modern telecom infrastructure requiring high-density channel integration.

Telecom Replacement Considerations

Direct substitutes include other members of the PEF22504 family, such as the PEF22504E or PEF22554 variants, provided pinout and functional compatibility are verified. Cross-referencing datasheet revisions is essential to ensure equivalent electrical characteristics and interface support.