Infineon Technologies PSF 21150 F V1.4

Overview

PSF 21150 F V1.4 from Infineon Technologies is a single-chip ISDN S/T-interface controller IC implementing full Layer-1 (physical layer) functionality for Basic Rate Interface (BRI) terminal equipment, supporting TE, LT-T, LT-S, and NT operating modes with integrated HDLC controllers, DPLL-based clock recovery, and IOM-2 microcontroller interface. It delivers 2×64 kbps B-channel + 1×16 kbps D-channel throughput, operates at 3.3 V supply, and integrates transceiver control logic for direct connection to external line transformers.

For engineers reviewing the PSF 21150 F V1.4 datasheet, PSF 21150 F V1.4 pinout, PSF 21150 F V1.4 application, or PSF 21150 F V1.4 equivalent, key selection criteria include S/T-interface compliance with ITU-T I.430, support for both TE and NT roles in ISDN BRI systems, IOM-2 bus timing compatibility, integrated D-channel HDLC framing, and programmable transceiver synchronization behavior.

Technical Context

The PSF 21150 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 signal, with ≤1.5 UI peak-to-peak jitter tolerance per I.430. Its dual HDLC controllers handle independent B- and D-channel frame processing with configurable FIFO depths (16-byte receive, 8-byte transmit).

It supports three distinct operational states-TE (Terminal Equipment), NT (Network Termination), and LT (Line Termination)-with mode-specific state machines, C/I code handling, and activation/deactivation sequences defined in ITU-T I.430 Annex A. The IOM-2 interface provides parallel or serial microcontroller access with strobed data transfer and monitor channel capability.

Key Specifications

Pinout & Package

PSF 21150 F V1.4 is housed in a 128-pin LQFP package (20 mm × 20 mm, 0.4 mm pitch) with thermal pad, designed for surface-mount assembly and ISDN line-card applications requiring EMI robustness and thermal stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PSF 21150 F V1.4, the TDA10073 demands more external timing components and offers narrower mode support, while the PSB 21150 lacks critical V1.4 firmware enhancements for S-transceiver synchronization reliability in noisy line environments.

Availability

PSF 21150 F V1.4 is available at Aetrix Electronics and suitable for ISDN terminal adapters, PBX line cards, and industrial remote I/O gateways requiring stable component supply, long-term lifecycle assurance, and full I.430 compliance.

Supply support for PSF 21150 F 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 headquarters in Munich and global R&D and manufacturing infrastructure.

The PSF 21150 belongs to Infineon's IPAC-X family of ISDN interface controllers, designed specifically to integrate full Layer-1 functionality-including DPLL, HDLC, and multi-role state machines-into compact, low-power communication equipment for telephony and industrial networking.

FAQ

Does PSF 21150 F V1.4 require an external crystal oscillator?

No. The device incorporates a digital phase-locked loop (DPLL) capable of recovering clock directly from the S/T line per ITU-T I.430, eliminating the need for an external crystal in most configurations. An optional 16.384 MHz CLKIN may be provided for system-level timing synchronization or DPLL bypass, but it is not mandatory for basic operation.

Can PSF 21150 F V1.4 operate in both TE and NT modes simultaneously?

No. The device operates in one defined role at a time-TE, NT, LT-T, or LT-S-as configured via its MODE register and initialization sequence. Mode switching requires full reset and reinitialization; concurrent dual-role operation is not supported by the hardware architecture or firmware.

What is the purpose of the MONCLK/MONDAT pins?

These pins implement the IOM-2 Monitor Channel-a dedicated synchronous interface allowing real-time observation of raw S/T bitstream and layer-1 status flags without CPU involvement. It enables non-intrusive diagnostics, protocol analysis, and EMI troubleshooting by feeding monitored data directly to an external logic analyzer or FPGA.

Is PSF 21150 F V1.4 RoHS compliant?

The PSF 21150 F V1.4 was released in January 2003, predating the EU RoHS Directive (2006 enforcement). While Infineon later introduced RoHS-compliant variants (e.g., PSF 21150 F V1.4-1), this specific revision uses leaded solder finish and contains lead in the die attach and packaging materials per 2003 manufacturing standards.