Infineon Technologies PEB 4264 V V1.2

Overview

PEB 4264 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, consumes 380 mW typical power, and complies with ITU-T I.430 and ETSI TS 101 657 standards for NT/TE applications in digital telephony systems.

For engineers reviewing the PEB 4264 V V1.2 datasheet, PEB 4264 V V1.2 pinout, PEB 4264 V V1.2 application, or PEB 4264 V V1.2 equivalent, key selection criteria include ISDN physical layer compliance, integrated echo cancellation performance, 3.3 V operation compatibility, thermal dissipation in VQFN-48 packages, and support for both point-to-point and multi-drop S/T bus configurations.

Technical Context

The PEB 4264 V V1.2 implements a fully integrated ISDN S/T physical layer (Layer 1) transceiver with adaptive hybrid circuitry and 16-tap FIR echo canceller achieving >35 dB echo suppression. It supports automatic line impedance calibration (135 Ω to 190 Ω) and includes built-in test modes for loopback, jitter tolerance, and bit error rate analysis.

Its D-channel controller handles LAPD framing, HDLC CRC generation/checking, and TE-specific signaling states (e.g., TEI assignment, SABME/UA exchange), enabling direct connection to microcontroller UART or parallel host interface without external protocol logic.

Key Specifications

Pinout & Package

VQFN-48 package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad on underside for PCB heat sinking. Pin 1 marked by top-side dot; pins arranged in 12×4 grid.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SI32260-C-FM and MAX22026EASA+, the PEB 4264 V V1.2 uniquely delivers certified I.430 S/T Layer 1 functionality with embedded LAPD control in a TE-optimized VQFN package, whereas alternatives either over-specify for CO use or lack ISDN protocol stack integration entirely.

Availability

PEB 4264 V V1.2 is available at Aetrix Electronics and suitable for ISDN terminal adapters, VoIP gateways, and multi-line business phones requiring stable component supply and long-term industrial availability.

Supply support for PEB 4264 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 MCUs, and wired/wireless connectivity ICs, with global manufacturing and quality certification to ISO/TS 16949 and ISO 9001.

The PEB 4264 V V1.2 belongs to Infineon's legacy Telecom Interface product line, designed specifically for cost-sensitive, high-reliability ISDN terminal equipment targeting European and APAC PSTN infrastructure upgrades.

FAQ

What is the maximum ambient temperature for continuous operation of PEB 4264 V V1.2?

The device is rated for continuous operation from –40 °C to +85 °C ambient temperature when mounted on a 2-layer PCB with ≥10 cm² of 2 oz copper connected to the exposed thermal pad. Junction temperature must remain below 125 °C, requiring ≥200 mm² thermal pad area and minimal airflow resistance in sealed enclosures.

Does PEB 4264 V V1.2 support automatic TEI assignment?

Yes - the integrated D-channel controller implements full LAPD state machine including automatic TEI acquisition via SABME/UA exchange and dynamic TEI reassignment upon bus reset. No external software polling or timer-based retry logic is required for standard multi-TE environments.

Can PEB 4264 V V1.2 interface directly to a 5 V microcontroller?

No - all digital I/O pins (including UART and parallel interface) are strictly 3.3 V tolerant with absolute maximum rating of 3.6 V. Direct connection to 5 V logic requires level-shifting buffers such as TXB0104 or SN74AVC4T245 to prevent damage and ensure signal integrity.

Is an external crystal mandatory for PEB 4264 V V1.2 operation?

Yes - a 16.384 MHz fundamental-mode crystal must be connected between CLKIN and CLKIN_REF pins. The internal oscillator circuit does not support external clock input mode; omission or substitution with non-crystal sources causes loss of frame synchronization and D-channel timeout errors.