Infineon Technologies PSB 21483 F V1.7

Overview

PSB 21483 F V1.7 from Infineon Technologies is a single-chip ISDN terminal controller integrating C166 16-bit CPU, S/T transceiver compliant with ITU-T I.430, USB 1.1 full-speed (12 Mbit/s), PCM codec (A-Law/µ-Law per G.711), and analog front end with echo cancellation. It supports full-duplex hands-free operation, DTMF generation/reception, and direct connection of handset, headset, speakerphone, and microphone.

For engineers reviewing the PSB 21483 F V1.7 datasheet, PSB 21483 F V1.7 pinout, PSB 21483 F V1.7 application in ISDN terminal design, or PSB 21483 F V1.7 equivalent for voice-over-ISDN systems, this page delivers verified functional scope, interface mapping, AFE signal chain details, and USB endpoint configuration - all critical for embedded telephony BOM validation and firmware integration.

Technical Context

The PSB 21483 implements Layer-1 and basic Layer-2 ISDN protocol handling via integrated HDLC controllers and S/T line transceiver. Its fixed-point DSP performs real-time acoustic echo cancellation, dual transducer correction filtering, and tone generation (ringing, DTMF, feedback).

USB connectivity uses an IOM-2 interface with 15 software-configurable endpoints plus bidirectional control endpoint 0. The analog front end provides three differential microphone inputs (handset, speakerphone, headset) and three differential outputs (200 Ω earpiece/headset, 100 mW @ 20 Ω loudspeaker), all compliant with ITU-T G.712 and ETSI NET33.

Key Specifications

Pinout & Package

P-TQFP-144 package: 144-pin thermally enhanced thin quad flat pack with exposed thermal pad, 0.5 mm pitch, body size 20 × 20 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ISDN terminal controller applications.

Compared with PSB 21482, the PSB 21483 adds full-speed USB 1.1 with configurable endpoints - enabling PC-hosted telephony features without external PHY. Against CX82100, it trades ARM flexibility and modem support for deterministic real-time echo cancellation and tighter ISDN timing compliance via dedicated C166 architecture.

Availability

PSB 21483 F V1.7 is available at Aetrix Electronics and suitable for ISDN terminal equipment, USB-ISDN gateways, unified messaging devices, and industrial data terminals requiring stable component supply and long-term lifecycle support.

Supply support for PSB 21483 F V1.7 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 INCA-S product line delivers highly integrated ISDN terminal controllers targeting voice-centric embedded systems - combining protocol handling, analog signal processing, and host interface logic in one package to minimize external component count and system-level timing complexity.

FAQ

What is the maximum supported USB endpoint count including control endpoint 0?

The PSB 21483 supports 15 software-configurable endpoints plus the mandatory bidirectional control endpoint 0, totaling 16 active endpoints. All endpoints operate in full-speed mode (12 Mbit/s) and are managed by the integrated IOM-2 interface without external USB controller logic.

Does the PSB 21483 require an external crystal for ISDN and USB timing?

Yes - a 16.384 MHz fundamental-mode crystal connected to XTAL1/XTAL2 is required. This frequency serves as the base clock for ISDN bit timing and is internally multiplied via PLL to generate the 48 MHz USB clock and other system clocks, eliminating need for multiple crystals.

Can the analog front end drive a 20 Ω loudspeaker directly without external amplification?

Yes - the AOP3 output is rated for 100 mW into 20 Ω load with THD <1% at 1 kHz. It includes short-circuit protection and thermal shutdown, enabling direct loudspeaker connection in speakerphone applications without external Class-D or AB amplifier stages.

Is the C166 CPU core accessible for custom firmware development?

Yes - the on-chip OCDS Level-1 debug system provides full JTAG-based debugging, flash programming, and real-time variable inspection. Infineon's C166 toolchain (DAVE™, Keil µVision) supports complete firmware development, including ISDN stack integration and USB audio class implementation.