Infineon Technologies PEF 24625 E V1.2

Overview

PEF 24625 E V1.2 from Infineon Technologies is a 16-channel symmetric DSL controller (SDC-16i) for SHDSL.bis systems, implementing full G.991.2 compliance, supporting up to 6 Mbit/s per channel, ATM/Packet/TDM backplane interfaces (UTOPIA/POS-PHY/MII), and integrated IMA bundling with 8 kbit/s payload granularity. It serves as the central control unit in high-density DSLAM line cards.

For engineers reviewing the PEF 24625 E V1.2 datasheet, PEF 24625 E V1.2 pinout, PEF 24625 E V1.2 application, or PEF 24625 E V1.2 equivalent, key selection criteria include UTOPIA Level 3/POS-PHY Level 4 interface support, on-chip AAL5 framer, absence of external RAM requirement for bundling, and 550 mW/channel power budget in SOCRATES-16Bis system architecture.

Technical Context

The PEF 24625 E V1.2 implements a multi-protocol TC layer engine supporting ATM, Ethernet/Packet, and TDM transport modes via programmable bundling. Its embedded microcontroller executes channel management, framer control (AAL5), and API-driven configuration over a dedicated µC bus to four SDFE-4 front ends.

It integrates a 16-lane TDM interface, UTOPIA Level 3 and POS-PHY Level 4 buses, MII for Ethernet packet mode, and PLL-based clock synthesis for synchronous line timing. No external RAM or external controller is required for IMA or channel bundling operations.

Key Specifications

Pinout & Package

PEF 24625 E V1.2 is housed in a P-BGA-484 package (19 mm × 19 mm, 1.0 mm pitch), with thermal pad exposed on underside. Pin assignment follows Infineon's SOCRATES-16Bis reference layout, optimized for signal integrity in multi-channel DSL line card designs.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar symmetric DSL controller applications.

Compared with PEF 24625 E V1.2, PEF 24621 E halves channel capacity and power draw but retains identical interface compatibility, while Lantiq Danube trades carrier-grade backplane support for integrated VoIP processing - making PEF 24625 E V1.2 irreplaceable for DSLAM line card control requiring UTOPIA/POS-PHY and IMA.

Availability

PEF 24625 E V1.2 is available at Aetrix Electronics and suitable for DSLAM line cards, remote DLC terminals, and MSAP aggregation nodes requiring stable component supply, long-term lifecycle assurance, and G.991.2-compliant SHDSL.bis control functionality.

Supply support for PEF 24625 E V1.2 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 centers and ISO/TS 16949-certified wafer fabs.

The SOCRATES product line delivers carrier-grade wired communication chipsets for DSL infrastructure, specifically engineered for high-density, low-power, standards-compliant SHDSL.bis deployment in central office and remote terminal equipment.

FAQ

What interfaces does PEF 24625 E V1.2 support for backplane connectivity?

PEF 24625 E V1.2 natively supports UTOPIA Level 3, POS-PHY Level 4, MII, and a 16-lane TDM interface. These are implemented as parallel synchronous buses with source-synchronous clocks, enabling direct connection to ATM switches, packet processors, and TDM concentrators without level-shifting or serialization logic.

Does PEF 24625 E V1.2 require external RAM for IMA bundling?

No. The device integrates sufficient on-chip memory and a dedicated bundling engine to perform IMA (Inverse Multiplexing over ATM) across all 16 channels without external RAM. This is confirmed in Infineon's SOCRATES-16Bis Product Brief and supported by the "No external RAM or controller required" specification under TC Features.

Can PEF 24625 E V1.2 operate standalone without an external microcontroller?

Yes - it contains an embedded microcontroller that handles initialization, SDFE-4 configuration, and runtime channel management. An external µC is optional and used only for higher-level system supervision or custom feature extension, not for basic SHDSL.bis operation.

What clock frequencies does the CLKIN pin accept?

The CLKIN pin accepts a fundamental-mode crystal or oscillator in the range of 13.0 MHz to 26.0 MHz. This feeds an internal PLL that generates all required core and interface clocks, including UTOPIA, TDM, and µC bus timing - no additional clock synthesizers are needed.