Texas Instruments DIX4192IPFBRG4

Overview

DIX4192IPFBRG4 from Texas Instruments is a dual-function CMOS digital audio interface IC integrating a receiver (DIR) and transmitter (DIT) compliant with AES3, S/PDIF, IEC 60958, and EIAJ CP-1201 standards. It supports sampling rates up to 216 kHz, features four differential line receivers and one differential line driver, and operates from 1.8-V core and 3.3-V I/O supplies. It is used in broadcast studio equipment and A/V receivers for format-conversion and jitter-reduced clock recovery.

For engineers reviewing the DIX4192IPFBRG4 datasheet, DIX4192IPFBRG4 pinout, DIX4192IPFBRG4 application, or DIX4192IPFBRG4 equivalent, key selection criteria include DIR PLL lock range (20–216 kHz), recovered clock jitter (250 ps RMS), dual audio serial ports supporting 24-bit data, user-selectable SPI/I²C host interface, and TQFP-48 package compatibility with SRC4382/SRC4392.

Technical Context

The DIX4192IPFBRG4 implements a dual-loop architecture: the DIR uses a wide-range PLL (20–216 kHz) to recover low-jitter master clocks (RXCKO) from incoming S/PDIF streams, while the DIT encodes PCM data into AES3 output with selectable source routing (DIT core or bypass multiplexer). Both DIR and DIT support automatic detection of non-PCM formats (DTS CD/LD, IEC 61937) and Q-channel sub-code decoding.

Two synchronous audio serial ports (A and B) operate in slave or master mode up to 216 kHz, supporting I²S, left-justified, and right-justified formats with programmable word lengths up to 24 bits. Host configuration is performed via SPI (≤40 MHz) or I²C (standard/fast mode), with interrupt-driven status reporting through open-drain INT and LOCK pins.

Key Specifications

Pinout & Package

TQFP-48 package (7.00 mm × 7.00 mm), lead-free, pin-compatible with TI's SRC4382 and SRC4392.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital audio interface receiver and transmitter applications.

Compared with SRC4382IPFBRG4, DIX4192IPFBRG4 adds Q-channel decoding and IEC 61937 detection for CD/DVD and broadcast metadata workflows; compared with PCM9211PWR, it delivers tighter integration, lower power, and native AES3 timing control - making it optimal for space-constrained, dual-role digital audio bridges.

Availability

DIX4192IPFBRG4 is available at Aetrix Electronics and suitable for broadcast studio equipment, digital audio routers, and A/V receivers requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for DIX4192IPFBRG4 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

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and digital signal technologies, with over 50 years of leadership in high-fidelity audio and professional media solutions.

The DIX4192IPFBRG4 belongs to TI's professional digital audio interface product line, designed specifically for broadcast-grade S/PDIF bridging, clock recovery, and format-transparent routing in studio, post-production, and consumer A/V systems.

FAQ

What is the primary function of the DIX4192IPFBRG4 in a digital audio system?

The DIX4192IPFBRG4 functions as an integrated digital audio interface receiver and transmitter (DIR/DIT), enabling bidirectional S/PDIF/AES3 signal handling with clock recovery, format detection, and PCM routing. It replaces discrete receiver-transmitter pairs in systems like A/V receivers and broadcast routers, reducing board space and improving jitter performance. The DIX4192IPFBRG4 supports both professional and consumer digital audio standards while maintaining low-latency, low-jitter operation across its full 20–216 kHz sampling range.

Does the DIX4192IPFBRG4 support I²C and SPI host interfaces simultaneously?

No, the DIX4192IPFBRG4 supports either I²C or SPI mode, selected at power-up via the CPM pin (pin 18): low = SPI, high = I²C. Both interfaces provide full access to control registers, channel status buffers, and user data buffers, but they cannot operate concurrently. The DIX4192IPFBRG4 does not auto-detect or switch modes dynamically; hardware configuration determines the active interface before initialization.

How does the DIX4192IPFBRG4 handle non-PCM audio streams such as Dolby Digital or DTS?

The DIX4192IPFBRG4 automatically detects IEC 61937-encapsulated non-PCM streams (including Dolby Digital and DTS) using on-chip pattern recognition. Upon detection, it routes the raw bitstream through the bypass multiplexer directly to the DIT outputs, preserving encryption and frame structure without decoding. This enables transparent pass-through to external decoders - a capability confirmed in the device's Feature Description section and validated in typical application schematics.

What is the significance of the RXCKO pin on the DIX4192IPFBRG4?

RXCKO (pin 12) is the tri-state output of the DIR's recovered master clock, delivering low-jitter timing (250 ps RMS) derived from the incoming S/PDIF stream. It serves as a clean system reference for synchronizing audio serial ports (A/B), the DIT, or external converters - eliminating need for separate clock cleaners. The DIX4192IPFBRG4 specifies RXCKO frequency range as 3.5–27.7 MHz, matching common audio master clock multiples (e.g., 128×fs for 48 kHz = 6.144 MHz).

Is the DIX4192IPFBRG4 pin-compatible with other Texas Instruments audio interface ICs?

Yes, the DIX4192IPFBRG4 is pin- and register-compatible with the TI SRC4382 and SRC4392 in the TQFP-48 package. This allows drop-in replacement in existing designs, though DIX4192IPFBRG4 adds features absent in those parts - including Q-channel sub-code decoding, enhanced non-PCM detection, and extended PLL lock range. Mechanical and electrical pin mapping matches exactly, enabling reuse of layout and firmware register maps where feature parity exists.