Infineon Technologies PEB 4265 V V1.2

Overview

PEB 4265 V V1.2 from Infineon Technologies is a single-chip ISDN S/T-interface transceiver IC supporting full-duplex 2B+D operation at 160 kbps, featuring integrated line driver, receiver, echo canceller, and D-channel controller. It operates from a 3.3 V supply, supports -43 dBm receive sensitivity, and is qualified for telecom terminal equipment in European ISDN networks.

For engineers reviewing the PEB 4265 V V1.2 datasheet, PEB 4265 V V1.2 pinout, PEB 4265 V V1.2 application, or PEB 4265 V V1.2 equivalent, key selection criteria include ISDN physical layer compliance (ETSI TS 101 524), integrated echo cancellation performance, line driver output swing (±2.5 V into 135 Ω), and D-channel protocol handling capability.

Technical Context

The PEB 4265 V V1.2 implements a complete ISDN S/T U-interface PHY layer with adaptive hybrid circuitry and digital echo cancellation using a 16-bit sigma-delta ADC and 16-bit DAC. It embeds a D-channel controller compliant with ETSI ETS 300 012-1 for Layer 2 LAPD framing and signaling.

It interfaces directly to a host microcontroller via an 8-bit parallel bus with interrupt and DMA-ready handshake signals, and supports both master and slave timing modes. The device includes on-chip voltage regulators for analog and digital domains and meets ETSI Class A emission limits.

Key Specifications

Pinout & Package

VQFN-48 (7 mm × 7 mm, 0.5 mm pitch), thermally enhanced, lead-free, RoHS-compliant package with exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ISDN S/T interface applications.

Compared with Si3215-D-GM and ST7570, the PEB 4265 V V1.2 delivers lowest system-level component count and deterministic D-channel timing, making it optimal for new ISDN terminal designs requiring ETSI certification and rapid time-to-market.

Availability

PEB 4265 V V1.2 is available at Aetrix Electronics and suitable for ISDN terminal adapters, PBX line cards, and industrial router WAN modules requiring stable component supply and ETSI regulatory compliance.

Supply support for PEB 4265 V 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 is a German semiconductor manufacturer specializing in power management, automotive, industrial, and communications ICs, with global R&D and manufacturing facilities.

The PEB 4265 V V1.2 belongs to Infineon's legacy telecom interface product line, designed specifically for ETSI-compliant ISDN S/T terminal equipment requiring single-chip physical and link-layer integration.

FAQ

What is the maximum loop length supported by the PEB 4265 V V1.2?

The PEB 4265 V V1.2 supports subscriber loop lengths up to 5.5 km with standard 0.4 mm copper wire, based on its -43 dBm receive sensitivity and ±2.5 V line driver output into 135 Ω. Performance validation follows ETSI TS 101 524 Annex A test conditions, including worst-case attenuation and crosstalk profiles.

Does the PEB 4265 V V1.2 require an external crystal oscillator?

No. The PEB 4265 V V1.2 uses an internal PLL locked to a 16.384 MHz reference clock input, which may be provided by a crystal oscillator or system clock source. No external crystal is integrated or required on the IC itself; only a clean 16.384 MHz CMOS-level clock signal is needed at the CLKIN pin.

Can the PEB 4265 V V1.2 operate in U-interface mode?

No. The PEB 4265 V V1.2 is strictly an S/T-interface transceiver and does not support U-interface (two-wire) operation. It is designed for connection to the network termination (NT) side of the ISDN line and must be used with a compliant NT1 device or integrated NT1+S/T solution.

Is the D-channel controller configurable for non-ETSI protocols like ANSI T1.601?

No. The embedded D-channel controller implements only ETSI ETS 300 012-1 (LAPD) and related European ISDN signaling standards. It does not support ANSI T1.601, ITU-T I.441, or other regional D-channel protocols - configuration is fixed in hardware and not user-modifiable.