Infineon Technologies PSB21391HV1.3

Overview

PSB21391HV1.3 from Infineon Technologies is a single-chip SCOUT-P Siemens codec with integrated UPN transceiver for ISDN S/T-interface applications, supporting B1/B2/D-channel framing, HDLC controller operation, 12-bit analog front-end with programmable gain, and speakerphone-capable signal processing. It operates at 5 V supply, features IOM-2 and serial control interfaces, and targets digital telephony terminal equipment.

For engineers reviewing the PSB21391HV1.3 datasheet, PSB21391HV1.3 pinout, PSB21391HV1.3 application, or PSB21391HV1.3 equivalent, key selection considerations include UPN burst timing compliance, HDLC transparent mode support (MDS2–0 = '100'/'101'/'110'/'111'), speakerphone echo cancellation coefficient set programmability, and IOM-2 monitor channel handshake capability.

Technical Context

The PSB21391HV1.3 integrates a full-duplex ISDN S/T physical layer transceiver with UPN (Universal Physical Network) burst-mode signaling, an HDLC controller with 64-byte FIFOs, and a programmable analog codec with 12-bit ADC/DAC, AGC, and tone generation. Its internal Layer-1 state machine handles UPN activation/deactivation sequences initiated by either terminal (TE) or line termination (LT).

It implements dual-path signal processing: one path for standard voice coding with AFE attenuation control and DTMF generation, another for speakerphone operation with acoustic/line-side speech comparators (SCAE/SCLE), adaptive echo suppression, and real-time coefficient updates via CRAM programming. Clocking supports external 16.384 MHz crystal or 2.048 MHz reference input.

Key Specifications

Pinout & Package

PSB21391HV1.3 is housed in a 128-pin LQFP package (20 mm × 20 mm, 0.4 mm pitch) with thermal pad. Pin functions are validated per Infineon DS1 (2001-03-07), pages 7–11.

Key Features

Applications

Equivalent & Alternatives

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

Compared with PSB21391HV1.3, PSB21393HV1.3 delivers production-ready speakerphone capability without runtime coefficient tuning, while TLE6240 shifts design complexity to external components - making PSB21391 optimal for integrated, MCU-managed ISDN endpoints with selective echo control.

Availability

PSB21391HV1.3 is available at Aetrix Electronics and suitable for ISDN terminal adapters, digital cordless phone base stations, VoIP gateways, and industrial remote I/O terminals requiring stable component supply across extended product lifecycles.

Supply support for PSB21391HV1.3 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 design centers.

The PSB21391HV1.3 belongs to Infineon's SCOUT-P family of ISDN S/T interface codecs, designed specifically for cost-effective, single-chip implementation of digital telephony terminal equipment compliant with ETSI and ITU-T standards.

FAQ

What clock sources does PSB21391HV1.3 support?

The PSB21391HV1.3 accepts either a 16.384 MHz crystal directly on CLKIN for full internal clock derivation, or a 2.048 MHz reference clock for simplified timing. Both options enable compliant ISDN S/T operation, with CLKOUT providing a buffered 2.048 MHz output for synchronizing external peripherals like microcontrollers or memory.

How is speakerphone functionality implemented in PSB21391HV1.3?

PSB21391HV1.3 implements speakerphone support via on-chip acoustic/line-side speech comparators (SCAE/SCLE), automatic gain controls (AGCX/AGCR), and programmable echo cancellation coefficients stored in CRAM. Unlike PSB21393, its speakerphone features require external coefficient loading and runtime adaptation but retain full hardware signal paths.

Does PSB21391HV1.3 support DTMF generation and detection?

Yes - it integrates four independent tone generators, a sequence engine, and tone filter capable of generating ETSI-compliant DTMF tones (697–1633 Hz) with precise amplitude and timing control. Detection is performed in the receive path using programmable coefficient-based filtering and level thresholding, not hardware DTMF decoder logic.

What interfaces are used to configure PSB21391HV1.3 registers?

Configuration is performed via two interfaces: the Serial Control Interface (SCI), a two-wire I²C-compatible bus (SDA/SCL) for indirect register and CRAM access, and the IOM-2 parallel interface (IOMD0–IOMD7 with strobes) for direct memory-mapped control and high-speed frame data transfer. Both are active simultaneously and independently addressable.