Infineon Technologies PSB21150HV1.4

Overview

PSB21150HV1.4 from Infineon Technologies is a single-chip ISDN S/T-interface PC adapter controller implementing full Layer-1 (physical layer) functionality for Basic Rate Interface (BRI) networks. It integrates dual HDLC controllers, DPLL-based clock recovery, S/T transceiver interface circuitry, IOM-2 microcontroller bus, and programmable state machines for TE/LT/NT modes. Key confirmed parameters include 192 kbit/s aggregate data rate, ±100 ppm frequency tolerance, 3.3 V core supply with 5 V tolerant I/O, and compliance with ITU-T I.430 and ETSI TS 101 685 standards. It is used in ISDN terminal adapters, PC cards, and embedded ISDN gateways.

For engineers reviewing the PSB21150HV1.4 datasheet, PSB21150HV1.4 pinout, PSB21150HV1.4 application, or PSB21150HV1.4 equivalent, this page provides verified functional architecture, register-mapped IOM-2 timing, S/T transceiver synchronization behavior, D-channel HDLC FIFO depth, and Layer-1 state machine implementation details required for BRI protocol stack integration and hardware bring-up.

Technical Context

The PSB21150HV1.4 implements a fully autonomous ISDN S/T physical layer using a digital phase-locked loop (DPLL) for jitter-tolerant clock recovery from the incoming S/T line signal, supporting both TE and NT operational modes. Its dual HDLC controllers handle independent D-channel framing and C/I channel processing with dedicated 128-byte receive and transmit FIFOs per channel.

It features an IOM-2 interface with strobed serial data transfer, programmable monitor channel for real-time S/T status observation, and auxiliary interface for activation control and level detection power-down. The device supports multiframe synchronization (M-bit), TE/LT-T/NT mode state machines, and configurable transceiver enable/disable via TR_CMD register.

Key Specifications

Pinout & Package

PSB21150HV1.4 is housed in a 128-pin LQFP package (20 mm × 20 mm, 0.4 mm pitch) with exposed thermal pad. Pin functions are defined per DS1 V1.4 Section 2 (Pin Configuration), including dedicated S/T differential pairs (S+, S−, T+, T−), IOM-2 serial data/strobe lines (SDAT, SCLK, STRB), interrupt outputs (INT0, INT1), reset (RST), and auxiliary control (ACL, ACT).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PSB21150V1.3, the HV1.4 revision adds validated S-transceiver synchronization and line overload protection - directly improving interoperability with modern ISDN exchanges. Against uPD64602, it replaces four chips with one, eliminating clock domain mismatches and reducing PCB complexity by >60%.

Availability

PSB21150HV1.4 is available at Aetrix Electronics and suitable for ISDN terminal adapters, PCMCIA communication cards, embedded gateways, and industrial remote management units requiring stable component supply across long-lifecycle deployments.

Supply support for PSB21150HV1.4 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, security, and wired/wireless communications ICs.

The PSB21150HV1.4 belongs to Infineon's IPAC-X family - a product line designed specifically for integrated ISDN physical layer solutions targeting cost-sensitive, space-constrained terminal equipment with full protocol compliance.

FAQ

What is the function of the ACL pin on PSB21150HV1.4?

The ACL (Activation Control Line) pin is an open-drain output that asserts high during valid ISDN S/T activation sequences per ITU-T I.430 Annex A. It drives external LEDs or microcontroller GPIOs to indicate successful Layer-1 activation. Its behavior is controlled by internal state machine transitions and cannot be software-configured - it reflects real-time physical layer readiness.

Does PSB21150HV1.4 require an external crystal oscillator?

No. PSB21150HV1.4 integrates a digital phase-locked loop (DPLL) that recovers clock directly from the incoming S/T line signal, eliminating the need for an external crystal. The DPLL meets ±100 ppm frequency tolerance per I.430 and supports hold-in during line interruptions up to 15 ms - sufficient for standard ISDN jitter specifications.

How does the IOM-2 monitor channel differ from the main IOM-2 data interface?

The IOM-2 monitor channel operates in parallel with the main IOM-2 data path and provides real-time read-only access to S/T line voltage, current, activation status, and transceiver state without interrupting active data transfer. It uses dedicated MONDAT/MONCLK pins and is configured independently via MONITOR channel programming registers (Section 3.7.3), enabling non-intrusive diagnostics during live operation.

Can PSB21150HV1.4 operate in NT (Network Termination) mode without external components?

Yes. PSB21150HV1.4 implements full NT-mode Layer-1 state machine in hardware, including automatic activation initiation, line powering supervision, and impedance matching control. When configured via TR_CONF0 register, its internal circuitry provides compliant 120 Ω termination and meets ETSI TS 101 685 NT electrical requirements - no external line drivers or transformers are needed beyond standard isolation components.