Infineon Technologies PEB3081HV1.4

Overview

PEB3081HV1.4 from Infineon Technologies is a single-chip S/T-bus interface circuit for ISDN terminal equipment (TE), implementing full Layer-1 physical layer control with integrated transceiver, DPLL clock recovery, IOM-2 microcontroller interface, and C/I channel handling. It supports TE, LT-T, LT-S, and NT operating modes, delivers ±100 ppm frequency accuracy, operates from 3.3 V supply, and integrates 128-byte internal RAM for protocol data buffering.

For engineers reviewing the PEB3081HV1.4 datasheet, PEB3081HV1.4 pinout, PEB3081HV1.4 application, or PEB3081HV1.4 equivalent, key selection considerations include S/T bus compliance (ETSI, ANSI T1.601), IOM-2 timing compatibility, DPLL jitter performance (<1.5 UI peak-to-peak), and support for both master and slave monitor channel operation in embedded ISDN systems.

Technical Context

The PEB3081HV1.4 implements a fully integrated S/T physical layer transceiver with programmable line driver/receiver gain, adaptive echo cancellation, and automatic activation/deactivation sequencing per ETSI TS 101 524. Its digital phase-locked loop (DPLL) recovers 160 kHz or 80 kHz clock from the S/T bus with jitter tolerance up to ±1.5 UI and holdover stability of ±100 ppm over temperature.

Control is executed via an IOM-2 serial interface supporting 8-bit or 16-bit data width, programmable bit-clock rates (1–8 MHz), and dual-channel monitor access with handshake and timeout logic. The device includes dedicated registers for C/I0/C/I1 command/indication handling, transceiver mode configuration (TR_MODE, TR_CONF0–2), and interrupt management across three priority levels.

Key Specifications

Pinout & Package

PEB3081HV1.4 is housed in a 64-pin LQFP package (10 mm × 10 mm, 0.5 mm pitch) with exposed thermal pad for enhanced power dissipation in sustained S/T line drive operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PEB3081HV1.4, the PEB3082HV1.4 offers higher integration and robustness for scalable deployments, while the uPD64602 demands more board area and software overhead but provides vendor-diversified sourcing.

Availability

PEB3081HV1.4 is available at Aetrix Electronics and suitable for ISDN terminal adapters, VoIP gateway modules, smart building controllers, and industrial telemetry units requiring stable component supply across long-lifecycle telecom deployments.

Supply support for PEB3081HV1.4 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 core expertise in wired and wireless connectivity solutions.

The PEB3081HV1.4 belongs to Infineon's SBCX-X family of ISDN interface circuits, designed specifically to replace discrete transceiver + controller implementations in cost-sensitive, space-constrained TE equipment.

FAQ

Does PEB3081HV1.4 support both TE and NT modes simultaneously?

No. The device operates in one defined mode-TE, LT-T, LT-S, or NT-at any given time, selected via MODE1/MODE2 register bits during initialization. Mode switching requires full reset and reconfiguration; concurrent dual-mode operation is not supported by hardware or firmware.

What transformer specifications are required for compliant S/T interface operation?

Infineon specifies a 1:1.41 turns-ratio broadband transformer with center-tapped secondary, 100 Ω characteristic impedance, and isolation rated to 1.5 kV RMS. Recommended part: Pulse Engineering T1201 or equivalent meeting IEC 60950 creepage/clearance requirements.

Can the internal DPLL lock to non-standard S/T clock frequencies?

No. The DPLL is hardwired to lock only to nominal 160 kHz (S/T) or 80 kHz (U-interface derivative) reference frequencies. Deviations beyond ±100 ppm cause loss of lock; no user-adjustable loop bandwidth or center frequency tuning is provided.

Is external RAM required for C/I message buffering?

No. The PEB3081HV1.4 contains 128 bytes of on-chip RAM mapped to C/I receive/transmit registers (CIR0/CIX0, CIR1/CIX1) and S/Q channel buffers, eliminating need for external memory in standard ISDN TE implementations.