Infineon Technologies PEB 3081 H V1.4

Overview

PEB 3081 H V1.4 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 host interface, and C/I channel handling. It supports TE, LT-T, LT-S, and NT operating modes, delivers ±100 ppm frequency accuracy over temperature, and operates from a 3.3 V supply with <150 mW typical power consumption in active mode.

For engineers reviewing the PEB 3081 H V1.4 datasheet, PEB 3081 H V1.4 pinout, PEB 3081 H V1.4 application, or PEB 3081 H V1.4 equivalent, key selection criteria include S/T interface compliance with ITU-T I.430, support for both synchronous and strobed IOM-2 timing, programmable transceiver configuration via register set, and integrated state machine control for activation/deactivation sequences.

Technical Context

The PEB 3081 H V1.4 integrates a fully digital S/T transceiver with adaptive line impedance matching, a digitally controlled phase-locked loop (DPLL) for jitter-tolerant clock recovery from the S/T bus (±150 ppm input jitter tolerance), and dual-mode IOM-2 interface supporting both serial data strobe (SDS) and bit-clock-synchronized transfers. Its internal state machine implements all ITU-T I.430 Layer-1 procedures including activation, deactivation, and maintenance signaling.

It features dedicated hardware for C/I channel handling (C/I0 and C/I1), monitor channel support for diagnostic access, auxiliary I/O for external control signals, and register-mapped configuration across four functional blocks: transceiver, auxiliary interface, IOM-2 handler, and interrupt/control logic - all accessible via 8-bit parallel or serial SCI interface.

Key Specifications

Pinout & Package

PEB 3081 H V1.4 is housed in a 64-pin LQFP (10 mm × 10 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are defined per Infineon DS1 V1.4 (2003), Section 2 "Pin Configuration".

Key Features

Applications

Equivalent & Alternatives

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

Compared with the PEB 3081 H V1.4, the SLIC3081 offers drop-in compatibility but lacks V1.4's synchronization and protection updates, while the PEB 3082 H delivers measurable jitter reduction and expanded interface options at the cost of board redesign effort.

Availability

PEB 3081 H V1.4 is available at Aetrix Electronics and suitable for ISDN terminal adapters, PBX interface cards, and industrial remote monitoring terminals requiring stable component supply and long-term lifecycle support.

Supply support for PEB 3081 H V1.4 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, industrial, and communications ICs, with global R&D and manufacturing infrastructure.

The PEB 3081 belongs to Infineon's SBCX-X family of ISDN interface circuits, designed specifically for cost-sensitive, high-reliability ISDN terminal and network termination equipment requiring full I.430 compliance in minimal footprint.

FAQ

Does PEB 3081 H V1.4 support both TE and NT operating modes?

Yes, the PEB 3081 H V1.4 implements hardware-based state machines for TE, LT-T, LT-S, and NT modes per ITU-T I.430. Mode selection is configured via MODE1/MODE2 registers and confirmed by ID register bits. Each mode defines distinct activation sequences, C/I handling, and timing behavior - verified in DS1 V1.4 Sections 3.5.1–3.5.3.

What is the maximum allowed input jitter on the S/T bus for reliable DPLL lock?

The DPLL in PEB 3081 H V1.4 tolerates ±150 ppm of frequency deviation on the incoming S/T signal, corresponding to ±24 ppm of jitter at 160 kHz (Section 3.4.2). This meets ITU-T I.430 Annex A requirements and ensures robust lock under typical line impairments including echo and crosstalk.

Can the IOM-2 interface operate without an external clock source?

No - the IOM-2 interface requires either an external bit clock (SCLK) or a serial data strobe (SDS) signal from the host controller. The device does not generate its own IOM-2 timing; it synchronizes to host-provided edges. Section 3.7.2 explicitly states that SDS or SCLK must be supplied externally for valid data transfer.

Is there built-in protection against line surges or ESD on the S/T pins?

The PEB 3081 H V1.4 does not integrate primary surge protection; DS1 V1.4 Section 3.3.6.1 specifies external protection circuitry (e.g., gas discharge tubes, TVS diodes) must be used on TX+/TX−/RX+/RX−. However, the I/O pins feature on-chip ESD protection rated to ±2 kV HBM (Human Body Model), per JEDEC JS-001.