Infineon Technologies PEF 22554 HT V3.1

Overview

PEF 22554 HT V3.1 from Infineon Technologies is a quad-channel E1/T1/J1 framer and line interface unit (LIU) with integrated analog switches, programmable frame alignment (ITU-T G.704), and a wide-range clock generation unit (1.02–20 MHz). It supports four independent long/short-haul interfaces, CRC-4 monitoring, PRBS generation/monitoring, and HDLC/BOM controllers (12 total, 3 per channel). Used in Node B line cards and SDH/SONET ADMs.

For engineers reviewing the PEF 22554 HT V3.1 datasheet, PEF 22554 HT V3.1 pinout, PEF 22554 HT V3.1 application, or PEF 22554 HT V3.1 equivalent, key selection criteria include E1/T1/J1 software-programmable framing, integrated impedance-matching analog switches, TR 62411-compliant jitter attenuation, dual-voltage operation (1.8 V/3.3 V), and PG-TQFP-144 package compatibility.

Technical Context

The device implements four independent framer channels, each with full ITU-T G.704 frame alignment/synthesis for 2.048 Mbit/s (E1) and 1.544 Mbit/s (T1/J1), plus CAS signaling support and ANSI T1.403 BOM message handling. Each channel includes dedicated HDLC controllers with 128-byte FIFOs and PRBS generators.

Its analog line interface integrates programmable transmit pulse shaping, receiver sensitivity of –36 dB@772 kHz and –43 dB@1024 kHz, and SSM generation/extraction per ITU-T G.703 Sec. 13. The clock generation unit accepts any reference from 1.02 to 20 MHz and enables crystal-less wander/jitter compensation compliant with TR 62411 and ETS-TBR 12/13.

Key Specifications

Pinout & Package

PEF 22554 HT V3.1 is packaged in PG-TQFP-144 (20×20 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad for enhanced heat dissipation in high-density line cards.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar framer and line interface applications.

Compared with PEF 22554 HT V3.1, the PEF 22554 E offers higher integration density and protection switching in LBGA, while the PEF 22553 HT reduces cost and power by 50% at the expense of port count - enabling tiered design scaling across wireless, access, and transport equipment.

Availability

PEF 22554 HT V3.1 is available at Aetrix Electronics and suitable for wireless base stations, SONET/SDH add-drop multiplexers, and multi-service access platforms requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PEF 22554 HT V3.1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies AG is a German semiconductor manufacturer specializing in power management, automotive, and communications ICs, with global R&D and manufacturing infrastructure.

The QuadFALC product line targets carrier-class telecom infrastructure, delivering integrated framer/LIU solutions that reduce system complexity and accelerate time-to-market for E1/T1/J1 line card designs.

FAQ

What clock frequencies does the PEF 22554 HT V3.1 support for its reference input?

The PEF 22554 HT V3.1 accepts a reference clock input ranging from 1.02 MHz to 20 MHz. This wide range enables direct use of common system clocks (e.g., 10 MHz, 12.288 MHz, 19.44 MHz) without external PLLs or crystal oscillators, supporting crystal-less jitter attenuation per TR 62411.

Does the PEF 22554 HT V3.1 support both E1 and T1 framing simultaneously across its four channels?

Yes - each of the four channels is independently software-programmable for E1 (G.704 double/CRC multi-frame), T1 (F4, ESF, SLC96), or J1 formats. Channel-specific configuration allows mixed-mode operation, such as two E1 and two T1 links on a single device, managed via SPI or parallel host interface.

What is the function of the ANALOG_SW pins on the PEF 22554 HT V3.1?

The ANALOG_SW[3:0] pins control integrated analog switches used for impedance matching (75/120 Ω for E1, 100 Ω for T1, 110 Ω for J1) and protection switching. These switches replace discrete external components, reducing PCB area and improving reliability in long-haul line interface designs.

Is the PEF 22554 HT V3.1 compatible with JTAG boundary scan testing?

Yes - the device includes full IEEE 1149.1-compliant JTAG boundary scan support via dedicated TMS, TCK, TDI, and TDO pins. This enables automated PCB test, in-system programming verification, and real-time debug access without requiring additional test hardware or probe points.