Infineon Technologies PEB 24902 H V2.1

Overview

PEB 24902 H V2.1 from Infineon Technologies is a quad-channel ISDN analog front-end (AFE) with integrated echo cancellation, designed for splitterless FDD ADSL-over-ISDN linecards in central office, DSLAM, and DLC systems. It supports both 4B3T (PSD mask down to 138 kHz) and 2B1Q (PSD mask down to 120 kHz) ADSL-friendly signaling, includes a digital transmit low-pass filter eliminating external passive splitters, and operates with a 15.36 MHz master clock derived from an internal PLL.

For engineers reviewing the PEB 24902 H V2.1 datasheet, PEB 24902 H V2.1 pinout, PEB 24902 H V2.1 application in ADSL-over-ISDN linecards, or PEB 24902 H V2.1 equivalent for GEMINAX MAX-based systems, this device delivers verified ISDN port conditioning, echo-canceled analog interface, and serial control compatibility with Infineon's DSL chipset architecture.

Technical Context

The IEC-4-AFE-X implements four independent ISDN B-channel analog interfaces with on-chip hybrid simulation, adaptive echo cancellation, and programmable gain control per channel. Its digital transmit path integrates a configurable low-pass filter aligned to ITU-T G.992.1-compliant PSD masks for 4B3T and 2B1Q modes.

It interfaces via a synchronous serial control interface (SCI) with the GEMINAX MAX digital frontend, uses boundary-scan (IEEE 1149.1) for testability, and relies on a 15.36 MHz master clock generated by an internal PLL locked to a 4.096 MHz crystal - with jitter transfer gain ≤ –30 dB across 10 Hz–100 kHz.

Key Specifications

Pinout & Package

P-MQFP-64-9 HS package: 64-pin plastic metric quad flat package with heat sink pad, 0.5 mm lead pitch, 10 mm × 10 mm body, JEDEC MS-026 compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad ISDN AFE applications.

Compared with PEB 24902 H V2.1, the V3.2 versions add explicit 2B1Q power metrics and clarify reset propagation to the digital low-pass filter, while PEF 24902 offers identical functionality under alternate part numbering - making V3.2 preferred for new designs and PEF 24902 suitable for continuity in existing BOMs.

Availability

PEB 24902 H V2.1 is available at Aetrix Electronics and suitable for DSLAM linecards, central office gateways, and remote DLC terminals requiring stable component supply and long-term lifecycle support for legacy ISDN/ADSL infrastructure.

Supply support for PEB 24902 H V2.1 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 IEC-4-AFE-X product line was developed specifically to enable splitterless ADSL-over-ISDN deployment in carrier-grade access networks, targeting DSLAM, CO, and DLC equipment where spectral compatibility and echo suppression are critical.

FAQ

Is PEB 24902 H V2.1 pin-compatible with earlier AFE V2.1 versions?

Yes - PEB 24902 H V2.1 maintains full mechanical and electrical pin compatibility with prior AFE V2.1 implementations, including identical P-MQFP-64-9 HS package dimensions, pin assignments, and DC/AC characteristics. No PCB redesign is needed for drop-in replacement in existing layouts.

What crystal frequency is required for the internal PLL?

A 4.096 MHz fundamental-mode crystal is required to generate the 15.36 MHz master clock (CL15) via the internal PLL. The datasheet specifies load capacitance of 12 pF, stability of ±50 ppm, and ESR ≤ 80 Ω - deviations may cause clock jitter exceeding –30 dB transfer gain limits.

Does PEB 24902 H V2.1 support both 4B3T and 2B1Q modes simultaneously?

No - the device operates in either 4B3T or 2B1Q mode per configuration via SCI register writes; mode selection determines the active PSD mask, transmit filter coefficients, and pulse coding table (Tables 11 and 12). Both modes share the same analog path but require distinct digital setup sequences.

How is echo cancellation implemented in this AFE?

Echo cancellation is performed digitally within the AFE's signal path using adaptive FIR filtering synchronized to the ISDN B-channel timing. It operates on the digitized receive path (AIN/BIN) and subtracts estimated echo from the transmit path (AOUT/BOUT), with coefficients updated dynamically during idle periods and calibrated per channel during initialization.