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Texas Instruments DIX9211PT
- Part No.:
- DIX9211PT
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 48-LQFP
- Datasheet:
-
DIX9211PT.pdf
- Description:
- IC AUDIO TRANSCEIVER 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,318
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Product details
Overview
DIX9211PT from Texas Instruments is a 216-kHz digital audio interface transceiver (DIX) integrating S/PDIF receiver (DIR), transmitter (DIT), and multi-source PCM routing logic. It supports 12 S/PDIF inputs (2 coaxial + 10 optical), 3x PCM inputs, and delivers 24-bit audio at sampling rates up to 216 kHz with 50-ps ultralow jitter. Used in home theater AV receivers for seamless switching between optical, coaxial, and PCM sources feeding a DSP.
For engineers reviewing the DIX9211PT datasheet, DIX9211PT pinout, DIX9211PT application, or DIX9211PT equivalent, this page provides verified technical context on asynchronous DIR/DIT operation, 48-pin LQFP package mapping, register-controlled power-down, I²C/SPI configuration, and real-world routing use cases in multichannel audio systems.
Technical Context
The DIX9211PT implements dual PLL architectures: one for DIR clock recovery (supporting 7–216 kHz input with ±12.5% jitter tolerance per IEC60958-3) and another for oscillator stabilization using a 24.576-MHz crystal. Its routing engine accepts three PCM inputs and 12 S/PDIF inputs, directing streams to Main Out, Aux Out, or DIT with independent format selection (I²S/LJ/RJ/16-bit RJ).
Control is implemented via hardware pins (RST, MODE) and register-accessible interfaces (SPI/I²C), enabling selective module power-down without register reset. The device features two interrupt outputs (ERROR/INT0, NPCM/INT1) tied to DIR lock loss, non-PCM detection (IEC61937/DTS-CD/LD), and eight configurable interrupt sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Sampling Rate | 216 kHz - enables high-resolution audio processing including 192-kHz PCM and DSD-over-PCM paths |
| DIR Input Count | 12 total: 2 coaxial (RXIN0/RXIN1 with integrated amplifiers) + 10 optical (RXIN2–RXIN7 + MPIO_A multiplexed) |
| Jitter Performance | 50 ps RMS system clock jitter - meets broadcast-grade timing stability for professional audio conversion |
| Audio Data Width | 24-bit - supports full dynamic range of studio master recordings without truncation or dithering |
| Supply Voltage Range | 2.9 V to 3.6 V across VCC (analog PLL), VDD (digital core), and VDDRX (coaxial amps) - allows single 3.3-V rail design with local decoupling |
| Operating Temperature | –40°C to +85°C - qualified for consumer AV equipment deployed in uncontrolled thermal environments |
| Package | LQFP-48 - surface-mount compatible with standard reflow profiles; 7 mm × 7 mm footprint |
Pinout & Package
Package: 48-pin LQFP (PT), 7 mm × 7 mm, 0.5-mm pitch, exposed pad not specified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RXIN0, RXIN1 | Coaxial S/PDIF inputs | Integrated 20-kΩ input amplifiers; require VDDRX supply; support TTL-level coax signals up to VDDRX + 0.3 V |
| RXIN2–RXIN7, MPIO_A0–A3 | Optical/CMOS S/PDIF inputs | 10 additional inputs; RXIN2–RXIN7 fixed; MPIO_A0–A3 configurable as RXIN8–RXIN11 via register |
| DOUT, LRCK, BCK, SCKO | Main PCM output port | 24-bit serial audio data, left/right clock, bit clock, and system clock outputs; all CMOS, 3.3-V tolerant |
| ERROR/INT0, NPCM/INT1 | Interrupt/status outputs | Open-drain capable; configurable as DIR error flag or non-PCM detection (IEC61937/DTS); share interrupt vector |
| MDO/ADR0, MDI/SDA, MC/SCL, MS/ADR1 | I²C/SPI control interface | Supports 400-kHz I²C or SPI mode; ADR0/ADR1 set slave address; SDA open-drain in I²C mode |
| RST | Hardware reset input | Active-low; internal 50-kΩ pull-down; asserts full power-down and register reset when held low |
| XTI, XTO | Crystal oscillator terminals | Accept 24.576-MHz fundamental-mode crystal; CMOS Schmitt-trigger input; requires external loop filter on FILT |
Key Features
| Feature | Design Value |
|---|---|
| Asynchronous DIR/DIT operation | Enables simultaneous 96-kHz analog sampling and 48-kHz S/PDIF playback without sample-rate conversion hardware |
| 48-bit channel status buffer | Stores complete IEC60958 frame header for real-time decoding of format, copyright, and pre-emphasis flags |
| Multi-source PCM routing | Routes any combination of 3x PCM inputs and DIR output to Main Out, Aux Out, or DIT - eliminates external mux ICs |
| Register-based power control | Independent enable/disable of DIR, DIT, coax amps, and oscillator via Power Control Register (40h) - preserves config state |
| Non-PCM detection logic | Identifies IEC61937-compliant compressed streams (AC-3, DTS-CD/LD) using burst preamble and channel status analysis |
Applications
| Home Theater AV Receiver | High-End Soundbar |
|---|---|
Use Scenario: Aggregating HDMI-ARC, optical TV audio, and coaxial Blu-ray player inputs into a single DSP pipeline. IC Role / Device Role / Timing Role: Digital front-end transceiver handling protocol translation, clock recovery, and source arbitration. Use Value: Eliminates need for discrete S/PDIF receivers and external clock cleaners while supporting 216-kHz upsampling paths. |
Use Scenario: Routing multiple streaming sources (Wi-Fi audio, Bluetooth baseband, optical TV feed) to a dual-DSP architecture. IC Role / Device Role / Timing Role: Multi-input audio switch with embedded PLL jitter cleaning and format normalization. Use Value: Reduces BOM count by consolidating 12-input S/PDIF reception, 3x PCM ingress, and synchronized DIT output in one LQFP package. |
| Professional Audio Interface | Digital Broadcast Encoder |
Use Scenario: Capturing 24-bit/192-kHz studio monitor feeds via optical TOSLINK and routing to FPGA-based mixing engine. IC Role / Device Role / Timing Role: Low-jitter DIR with precise sample-rate calculation and auxiliary clock output for FPGA synchronization. Use Value: Provides 50-ps RMS jitter performance and 48-bit channel status access required for AES3 compliance testing. |
Use Scenario: Embedding Dolby Digital or DTS metadata into broadcast S/PDIF streams for terrestrial/cable transmission. IC Role / Device Role / Timing Role: DIT with full IEC61937 packetization capability and user-data insertion via MPIO pins. Use Value: Enables direct generation of compliant AC-3 frames without host CPU intervention using register-loaded metadata buffers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital audio transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| CS8416-CZZR | 8-channel S/PDIF receiver only; no DIT or routing; 24-bit/192-kHz max; I²C-only control | Lacks transmitter and multiplexer functions - requires external DIT and logic for full transceiver functionality | Select when only high-channel-count DIR is needed and DIT/routing are handled elsewhere |
| AK4118VN | 10-channel S/PDIF receiver/transmitter; no coaxial amps; 24-bit/192-kHz; supports I²S/PCM but no IEC61937 packetization | Missing non-PCM detection and 48-bit channel status buffer - unsuitable for Dolby/DTS metadata extraction | Choose for cost-sensitive stereo audio systems where compressed stream handling is unnecessary |
Compared with CS8416-CZZR and AK4118VN, the DIX9211PT uniquely integrates 12-input DIR, full DIT, and 8-channel PCM routing in one device - reducing PCB area and eliminating inter-chip timing skew in multichannel broadcast and AV receiver designs.
Availability
DIX9211PT is available at Aetrix Electronics and suitable for home theater AV receivers, high-end soundbars, and professional audio interfaces requiring stable component supply and long-term industrial availability.
Supply support for DIX9211PT 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 leader specializing in analog, embedded processing, and digital signal technologies with over 50 years of innovation in precision audio and timing solutions.
The DIX9211PT belongs to TI's high-fidelity digital audio interface product line, designed specifically for multichannel consumer and pro-audio equipment requiring robust S/PDIF handling, low-jitter clock recovery, and flexible source routing without external logic.
FAQ
What is the maximum supported sampling frequency for the DIX9211PT DIR and DIT modules?
The DIX9211PT supports a maximum sampling frequency of 216 kHz for both its digital audio interface receiver (DIR) and transmitter (DIT) modules. This capability enables handling of high-resolution audio formats including 192-kHz PCM and DSD-over-PCM streams. The device maintains full 24-bit data width and meets IEC60958-3 jitter tolerance requirements across the entire 7–216 kHz range, making it suitable for studio-grade audio applications.
Does the DIX9211PT include built-in coaxial input amplifiers, and how are they powered?
Yes, the DIX9211PT includes two dedicated coaxial input amplifiers on pins RXIN0 and RXIN1. These amplifiers are powered by the separate VDDRX supply pin (2.9 V to 3.6 V), with GNDRX as the associated ground. When coaxial inputs are unused, VDDRX may be left unconnected. Amplifier enable/disable is controlled via Register 34h (RX0DIS/RX1DIS), allowing software-selectable power optimization without affecting other DIR functions.
How does the DIX9211PT handle non-PCM audio streams such as Dolby Digital or DTS?
The DIX9211PT detects non-PCM audio (e.g., Dolby Digital, DTS-CD/LD) through dedicated logic that analyzes IEC61937 burst preambles, channel status bits, and frame structure. Detection triggers the NPCM/INT1 pin and stores status in registers 2Bh and 3Ah–3Dh. This enables host processors to route compressed streams to appropriate decoders without requiring real-time bitstream parsing - a key feature for AV receivers supporting multi-format playback.
Can the DIX9211PT operate with different sampling rates on its DIR and DIT ports simultaneously?
Yes, the DIX9211PT supports fully asynchronous operation between its DIR and DIT modules. Each port has independent PLLs and clock domains, allowing the DIR to lock to a 48-kHz S/PDIF source while the DIT transmits at 96-kHz - or vice versa. This eliminates the need for external sample-rate converters in systems that mix legacy and high-resolution audio sources, preserving signal integrity and reducing latency.
What control interfaces does the DIX9211PT support, and how is the mode selected?
The DIX9211PT supports both I²C (up to 400 kHz) and SPI control interfaces. Mode selection is determined by the hardware MODE pin: logic high selects I²C; logic low selects SPI. Pin assignments are shared - MDI/SDA serves as SPI data input or I²C bidirectional data, while MC/SCL functions as SPI clock or I²C clock. Configuration registers retain state across partial power-down, enabling reliable reinitialization without full firmware reload.
DIX9211PT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 48-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Audio Transceiver
- Applications:
- Consumer Audio, Musical Instruments
- Number of Channels:
- 2
- Interface:
- I2C, I2S, SPI
- Voltage - Supply:
- 2.9V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Specifications:
- 7kHz ~ 216kHz
- Mounting Type:
- Surface Mount
- Grade:
- -
DIX9211PT FAQ
1.How can I place an order for DIX9211PT through Aetrix?
Please submit a Request for Quotation (RFQ) for DIX9211PT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for DIX9211PT reliable?
The price and inventory of DIX9211PT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DIX9211PT is usually 5 days.
3.What payment methods are accepted for DIX9211PT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DIX9211PT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DIX9211PT?
DIX9211PT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DIX9211PT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for DIX9211PT?
For technical support, including DIX9211PT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DIX9211PT requirements.
6.How does Aetrix verify that DIX9211PT is sourced from the original manufacturer or authorized distributors?
All DIX9211PT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that DIX9211PT meets industry standards.
7.What is the process for return or replacement of DIX9211PT?
All DIX9211PT units undergo pre-shipment inspection (PSI). If there is an issue with DIX9211PT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The DIX9211PT part is unused and in its original packaging.
Return procedure for DIX9211PT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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