Infineon Technologies PEB24902H

Overview

PEB24902H from Infineon Technologies is a 4-channel analog front-end (AFE) IC for ISDN line interface units, implementing 4B3T line coding, adaptive echo cancellation, automatic gain control, and polarity adaptation in a single P-MQFP-64 package. It supports full-duplex transmission over two-wire metallic loops up to 8.0 km on 0.6 mm wire and operates across –40°C to +85°C for central office and PBX linecards.

For engineers reviewing the PEB24902H datasheet, PEB24902H pinout, PEB24902H application, or PEB24902H equivalent, key selection criteria include 4B3T symbol rate (120 kHz), IOM®-2 interface compatibility (4 Mbit/s), relay driver capability (4 per channel), maintenance channel (1 kbit/s), and LT-mode activation support.

Technical Context

The PEB24902H functions as the analog signal conditioning stage in the IEC4-T ISDN chipset, paired with the DFE-T PEF24901 V2.1. It integrates ΣΔ ADCs, DACs, hybrid circuitry, bandgap reference, and level detection for wake-up-enabling full physical-layer processing of four B-channels and one D-channel.

Its architecture includes dedicated AGC, adaptive equalization, echo cancellation, and timing recovery blocks synchronized to a PLL-generated master clock. All four channels share common bias and reference structures while maintaining independent relay drivers (4 pins/channel) and status monitoring (2 pins/channel).

Key Specifications

Pinout & Package

P-MQFP-64 (Plastic Metric Quad Flat Package, 64-pin, 10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad. Pinout validated per Infineon preliminary datasheet PEB24902H V2.1 (04/1999) and block diagram integration with PEF24901 DFE-T.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ISDN analog front-end applications.

Compared with PEF24902 V2.1 and PEB24902G, the PEB24902H offers guaranteed –40°C to +85°C operation with full production screening, making it the preferred choice for carrier-grade central office hardware where reliability and long-term availability outweigh minor cost differences.

Availability

PEB24902H is available at Aetrix Electronics and suitable for central office linecards, access network DSLAMs, and PBX interface modules requiring stable component supply, extended temperature operation, and long-term lifecycle support.

Supply support for PEB24902H 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 PEB24902H belongs to Infineon's IEC4-T ISDN chipset family, designed specifically for high-density, multi-channel ISDN line interface units in carrier-class telephony infrastructure.

FAQ

What is the function of the IOM®-2 interface on the PEB24902H?

The IOM®-2 interface is a synchronous serial bus that connects the PEB24902H AFE to the PEF24901 DFE-T digital frontend. It transfers digitized analog samples, control commands, and status data at up to 4 Mbit/s. Its frame-aligned structure ensures deterministic latency and eliminates the need for external FIFOs or glue logic in the chipset interface.

Does the PEB24902H support both LT and NT modes?

Yes, the PEB24902H supports both line termination (LT) and network termination (NT) modes via configuration pins and register settings. In LT mode, it drives the line toward the subscriber; in NT mode, it terminates the line at the exchange. Mode switching is software-controlled and requires no hardware changes.

How does the 4B3T line coding implementation affect system design?

The PEB24902H embeds full 4B3T encoding/decoding, eliminating the need for external line code converters. This reduces BOM count and PCB area while ensuring strict compliance with ITU-T I.430 and ETSI TS 102 080. The 120 kHz symbol rate directly maps to 160 kbit/s aggregate ISDN basic rate throughput per channel.

Can the relay drivers be used for off-hook detection?

No - the four relay driver pins per channel are output-only and designed to switch external relays or power controllers. Off-hook detection is handled separately by the level detection circuit feeding the wake-up comparator and status pins (STATx1/STATx2), which report line voltage thresholds and activation state.