Infineon Technologies PEF 22554 E V3.1

Overview

PEF 22554 E V3.1 from Infineon Technologies is a quad-channel E1/T1/J1 framer and line interface unit (LIU) with integrated analog switches, crystal-less jitter/wander compensation per TR-62411 and ETS-TBR 12/13, and programmable frame formats including CRC Multi-frame (E1), ESF (T1), and SLC96 (T1). It operates across -40°C to +85°C and supports 1.02–20 MHz reference clocks. Used in Node B line cards and SDH/SONET ADMs.

For engineers reviewing the PEF 22554 E V3.1 datasheet, PEF 22554 E V3.1 pinout, PEF 22554 E V3.1 application, or PEF 22554 E V3.1 equivalent, key selection criteria include four independent LIU channels, software-programmable T1/E1/J1 mode per channel, integrated impedance-matching analog switches (75/120 Ω for E1, 100 Ω for T1), ITU-T G.704 frame alignment, and dual-voltage (1.8 V/3.3 V) operation.

Technical Context

The device integrates four independent framer+LIU channels, each supporting simultaneous E1/T1/J1 framing via software configuration and featuring dedicated HDLC controllers (three per channel, 128-byte FIFOs), CAS signaling, and ANSI T1.403 BOM support. It implements full G.704 frame alignment/synthesis at 2.048/1.544 Mbit/s with CRC-4 monitoring and PRBS generation.

Its clock generation unit accepts any reference clock from 1.02 MHz to 20 MHz and performs crystal-less wander/jitter attenuation compliant with TR-62411 and ETS-TBR 12/13. The analog front end includes programmable transmit pulse shaping and receiver sensitivity of -36 dB@772 kHz and -43 dB@1024 kHz.

Key Specifications

Pinout & Package

PEF 22554 E V3.1 is packaged in PG-LBGA-160 (15×15 mm, 1.0 mm ball pitch) with integrated analog switches for impedance matching (E1: 75/120 Ω, T1: 100 Ω) and protection switching - functionality exclusive to this package variant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar framer+LIU applications.

Compared with PEF 22554 HT, the PEF 22554 E V3.1 adds on-die protection switching capability and supports higher channel count density than quad-port alternatives; versus PEF 22854, it offers lower power and smaller footprint for mid-scale deployments.

Availability

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

Supply support for PEF 22554 E 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, industrial, and communications ICs, with global R&D and manufacturing infrastructure.

The QuadFALC® product line delivers highly integrated, software-configurable E1/T1/J1 framer+LIU solutions targeting next-generation telecom infrastructure equipment where flexibility, low BOM cost, and timing compliance are critical.

FAQ

What reference clock frequencies does PEF 22554 E V3.1 support?

PEF 22554 E V3.1 accepts any single-ended reference clock from 1.02 MHz to 20 MHz. This wide range eliminates the need for fixed-frequency crystals and enables direct use of system-level clocks, simplifying clock tree design and reducing component count in multi-port line cards.

Does PEF 22554 E V3.1 support both E1 and T1 framing on the same channel?

Yes - each of the four channels is software-programmable for E1 (Double- or CRC Multi-frame), T1 (F4, ESF, SLC96), or J1 framing. Configuration is performed via SPI or I²C interface, allowing dynamic reconfiguration without hardware changes or reset.

What is the purpose of the integrated analog switch in the PG-LBGA-160 package?

The integrated analog switch enables automatic impedance matching (75/120 Ω for E1, 100 Ω for T1) and protection switching - a feature exclusive to the PG-LBGA-160 package. It replaces discrete analog switches and relays, reducing PCB complexity and improving reliability in failover scenarios.

How does PEF 22554 E V3.1 handle jitter and wander compliance?

It implements crystal-less jitter and wander compensation compliant with ITU-T TR-62411 and ETS-TBR 12/13 using an internal digital phase-locked loop and adaptive filtering. No external VCXO or jitter cleaner IC is required, reducing bill-of-materials and board space.