Infineon Technologies PXB 4219 E V3.4

Overview

PXB 4219 E V3.4 from Infineon Technologies is an Interworking Element (IWE8) IC designed for ATM and AAL5 segmentation/reassembly across eight E1/T1 lines. It supports ATM mode, unstructured/structured CES, SRTS clock recovery with PLL-ACM, and integrates UTOPIA Level 2, IMA, and generic framer interfaces. Key confirmed parameters: 8-channel E1/T1 support, UTOPIA Level 2 interface, SRTS-compliant clock recovery, AAL5 segmentation with CAS transport, and internal 128-cell reassembly buffer per channel.

For engineers reviewing the PXB 4219 E V3.4 datasheet, PXB 4219 E V3.4 pinout, PXB 4219 E V3.4 application, or PXB 4219 E V3.4 equivalent, this device serves as a line-card interworking engine in carrier-grade access multiplexers, DSLAMs, and TDM-to-ATM edge concentrators-requiring precise timing alignment, cell delineation integrity, and framer port correlation.

Technical Context

The PXB 4219E implements dual-path ATM/AAL processing: its ATM transmit path performs HEC generation, idle cell insertion, and payload scrambling; receive path executes HEC check, cell delineation, and idle/unassigned cell deletion. It supports both ATM and AAL modes with dedicated segmentation and reassembly buffers.

Its clock recovery subsystem includes an Internal Clock Recovery Circuit (ICRC) with three PLL variants-SRTS, FILTER, and ACM-and supports fractional division for E1 (2.048 MHz) and T1 (1.544 MHz) frame rates. The device uses a microprocessor interface for configuration and an external RAM interface for descriptor tables.

Key Specifications

Pinout & Package

Package: 256-pin PQFP (Plastic Quad Flat Package), 28 mm × 28 mm, 0.4 mm pitch, lead-free compatible per Infineon DS3 revision history.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar interworking element applications.

Compared with PXB 4220E and PXB 4221E, the PXB 4219E delivers core IWE8 functionality at lowest gate count and power-optimized for cost-sensitive, high-volume E1/T1 line cards where echo cancellation or UTOPIA Level 3 are unnecessary.

Availability

PXB 4219 E V3.4 is available at Aetrix Electronics and suitable for DSLAM line cards, TDM-to-ATM edge concentrators, and carrier-grade access multiplexers requiring stable component supply, long-lifecycle support, and traceable sourcing for telecom infrastructure programs.

Supply support for PXB 4219 E V3.4 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 communications, power management, and automotive ICs, with headquarters in Munich and global design centers.

The PXB 4219E belongs to Infineon's IWE (Interworking Element) product line, engineered specifically for TDM-to-ATM interworking in carrier-class access equipment-emphasizing timing accuracy, protocol offload, and framer integration.

FAQ

What clock sources does the PXB 4219E support for SRTS operation?

The PXB 4219E accepts 2.048 MHz (E1) or 1.544 MHz (T1) reference clocks on CLKIN and generates a recovered SRTS-aligned output on CLKOUT. Its ICRC supports PLL-SRTS, PLL-FILTER, and PLL-ACM modes with fractional division to maintain G.823 jitter transfer compliance across temperature and voltage variations.

Does the PXB 4219E support CAS in structured CES mode?

Yes-the PXB 4219E supports structured CES with CAS transport, including CAS conditioning, upstream freezing, and downstream restoration. It embeds CAS bits into AAL5 PDUs and preserves timing relationships between voice channels and signaling frames per ITU-T I.363.2.

How many UTOPIA ports can the PXB 4219E drive simultaneously?

The PXB 4219E supports up to four UTOPIA Level 2 ports via shared DATA[7:0] and sideband signals (UTP_CLK, UTP_VALID, UTP_READY). Port addressing is handled through UTOPIA port address pins (PA[1:0]), enabling concurrent ATM cell flow to multiple downstream devices such as ATM switches or SAR chips.

Is external RAM required for PXB 4219E operation?

Yes-external RAM is mandatory for descriptor tables, segmentation/reassembly buffer pointers, and OAM cell storage. The device provides an 8-bit or 16-bit external RAM interface with dedicated address/data/control lines (RAM_CS, RAM_RD, RAM_WR) and supports standard asynchronous SRAM with ≤70 ns access time.