Infineon Technologies PSB 21384 H V1.3

Overview

PSB 21384 H V1.3 from Infineon Technologies is a single-chip SCOUT-SX Siemens codec with integrated S/T transceiver and speakerphone functionality for ISDN terminal equipment. It implements full Layer-1 physical layer signaling (S/T interface), HDLC controller, analog front-end with programmable gain, DSP-based echo cancellation, DTMF generation/detection, and IOM-2 digital interface - all in one 128-pin PQFP package. Key confirmed parameters: 3.3 V supply, 16.384 MHz master clock input, -40°C to +85°C operating temperature, and compliance with ETS 300 102 and ITU-T I.430 standards.

For engineers reviewing the PSB 21384 H V1.3 datasheet, PSB 21384 H V1.3 pinout, PSB 21384 H V1.3 application, or PSB 21384 H V1.3 equivalent, this device serves as a complete ISDN BRI line interface solution requiring no external transceiver or codec ICs - critical for compact ISDN terminal adapters, speakerphones, and embedded ISDN gateways where space, BOM count, and signal integrity are constrained.

Technical Context

The PSB 21384 H V1.3 integrates three core functional blocks: an S/T transceiver compliant with ITU-T I.430 U-interface timing and electrical specifications; a dual-channel HDLC controller supporting transparent, non-auto, and extended transparent modes with 128-byte FIFOs; and a fully programmable codec with adaptive echo cancellation, AGC for both transmit and receive paths, and four independent tone generators for DTMF and call-progress tones.

Its IOM-2 interface supports synchronous serial data transfer at up to 2.048 Mbps with strobed bit clock and monitor channel for real-time error detection. The device uses indirect register programming via SOP/COP/XOP commands and includes CRAM backup for coefficient retention across resets - enabling robust, field-upgradable voice processing without external memory.

Key Specifications

Pinout & Package

PSB 21384 H V1.3 is housed in a 128-pin plastic quad flat pack (PQFP) with 0.4 mm lead pitch, thermal pad on underside, and JEDEC MS-026AC footprint. Package dimensions: 20 mm × 20 mm × 2.45 mm (height).

Key Features

Applications

Equivalent & Alternatives

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

Compared with PSB 21384 H V1.3, PSB 21383 H V1.3 saves ~$1.20/unit but removes all speakerphone features, while TLE6240 increases total system component count by ≥5 and adds timing alignment complexity across three chips - making PSB 21384 H V1.3 the optimal choice for new ISDN voice terminal designs requiring integration, reliability, and certification-ready performance.

Availability

PSB 21384 H V1.3 is available at Aetrix Electronics and suitable for ISDN terminal adapters, embedded ISDN gateways, and conference speakerphones requiring stable component supply and long-term industrial lifecycle support.

Supply support for PSB 21384 H V1.3 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 wired communications ICs, with headquarters in Munich and global R&D centers.

The PSB 21384 H V1.3 belongs to Infineon's SCOUT-SX product line - designed specifically for single-chip ISDN BRI terminal equipment requiring integrated S/T transceiver, voice codec, and HDLC controller in industrial temperature grade.

FAQ

What is the maximum ambient temperature rating for PSB 21384 H V1.3?

The PSB 21384 H V1.3 is rated for continuous operation from -40°C to +85°C ambient temperature, as verified in Infineon's DS1 datasheet (Edition 2001-03-12, page 1). This industrial-grade specification ensures reliable performance in unventilated enclosures and outdoor ISDN terminal deployments without forced cooling.

Does PSB 21384 H V1.3 require external crystal or oscillator for S/T interface timing?

No - the device uses its internal PLL locked to the 16.384 MHz master clock (MCLK) input to generate all S/T interface timing signals, including the 2.048 MHz frame clock and 128 kHz sampling clock. No external crystal or oscillator is needed for basic I.430 compliance.

Can PSB 21384 H V1.3 operate with a 5 V microcontroller interface?

No - all digital I/O pins (including IOM-2, SCI, and parallel interface) are strictly 3.3 V tolerant. Direct connection to 5 V logic will damage the device. Level-shifting circuitry or a 3.3 V microcontroller is mandatory per Section 1.4 (Pin Definitions) of the datasheet.

Is CRAM backup supported for speakerphone coefficients after power cycle?

Yes - the PSB 21384 H V1.3 includes CRAM (Coefficient RAM) with automatic backup/restore functionality. Coefficients for echo cancellation, AGC, and tone generation are retained across power cycles when configured per Section 4.8.2.1 (CRAM Back-Up Procedure) in the datasheet.