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Texas Instruments DIR9001PW
- Part No.:
- DIR9001PW
- Manufacturer:
- Texas Instruments
- Category:
- Audio Special Purpose
- Package:
- 28-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
DIR9001PW.pdf
- Description:
- IC AUDIO RECEIVER 28TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,815
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Product details
Overview
DIR9001PW from Texas Instruments is a 28–108 kHz, 24-bit digital audio interface receiver IC that recovers low-jitter system clocks (50 ps rms) and decodes biphase-encoded S/PDIF, AES3, or EBU signals without external clocking. It delivers I²S, left-justified, or right-justified serial audio data with selectable output frequencies (128fS–512fS) and supports automotive-grade operation (–40°C to 85°C).
For engineers reviewing the DIR9001PW datasheet, DIR9001PW pinout, DIR9001PW application, or DIR9001PW equivalent, this page provides verified pin functions, IEC60958-3–compliant jitter tolerance, hardware-configurable audio format selection, and confirmed drop-in compatibility with DIR1703 in TSSOP-28 layouts.
Technical Context
The DIR9001PW implements a conventional PLL-based clock recovery architecture with VCO, charge pump, and loop filter (FILT–AGND), supporting continuous sampling frequency tracking from 28 kHz to 108 kHz. Its biphase decoder includes preamble detection, parity checking, and error flagging via ERROR pin.
Hardware control is fully pin-driven: PSCK[1:0] selects SCKO frequency, FMT[1:0] configures data format (I²S/24-bit left/right-justified), and CKSEL switches between PLL-recovered and 24.576-MHz XTI clock sources - no microcontroller required for basic operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Biphase Input Range | 28 kHz to 108 kHz sampling frequency - enables universal support for CD (44.1 kHz), DVD (48 kHz), high-res (88.2/96 kHz), and broadcast rates |
| Recovered Clock Jitter | 50 ps rms (typical) - meets IEC60958-3 timing integrity requirements for professional audio systems |
| Output Clock Options | 128fS, 256fS, 384fS, or 512fS - provides flexible master clock generation for DACs, ADCs, and DSPs |
| Data Output Formats | 24-bit I²S, 24-bit left-justified, 16-/24-bit right-justified - hardware-selectable via FMT0/FMT1 pins |
| Supply Voltage | 2.7 V to 3.6 V (VDD/VCC) - supports single 3.3-V rail with 5-V tolerant inputs (RXIN, RST, FMT0/1, etc.) |
| Operating Temperature | –40°C to 85°C - qualified for automotive infotainment and industrial audio equipment |
| Jitter Tolerance | IEC60958-3 compliant - ensures robust lock under real-world transmission impairments |
Pinout & Package
DIR9001PW is housed in a 28-pin TSSOP (PW) package with 0.65 mm pitch and nominal body size 4.40 mm × 9.70 mm. Thermal resistance RθJA = 81.9°C/W enables reliable operation at full load in compact enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| RXIN | Biphase input | 5-V tolerant TTL input for S/PDIF, AES3, or EBU signals - accepts direct connection to TOSLINK receivers |
| SCKO | System clock output | CMOS output of recovered clock (128fS–512fS) - drives DAC master clocks with <10 pF load |
| BCKO / LRCKO | Bit clock / word clock | CMOS outputs synchronized to SCKO - enable precise timing alignment for I²S interfaces |
| DOUT / COUT / UOUT | Audio / channel-status / user data | MSB-first serial outputs aligned to LRCKO edge - simplify downstream parsing without FIFO buffering |
| FILT | PLL loop filter | Connection point for RC filter to AGND - sets PLL bandwidth and stability (not VCC as in DIR1703) |
| CKSEL | Clock source select | Active-high control: Low = PLL-recovered clock, High = 24.576-MHz XTI source - enables seamless clock domain switching |
| ERROR | PLL/data error flag | Active-high CMOS output indicating loss of lock or biphase parity failure - triggers system-level fault response |
| RST | Reset input | 5-V tolerant, internal pullup, active-low - requires ≥100 ns pulse after VDD > 2.7 V for deterministic initialization |
Key Features
| Feature | Design Value |
|---|---|
| No external clock required for decode | Operates standalone using only biphase input - eliminates crystal/resonator BOM cost and layout area |
| IEC60958-3 jitter compliance | Validated against standard's periodic and wideband jitter limits - guarantees interoperability with certified transmitters |
| Hardware-configurable audio formats | FMT0/FMT1 pins set I²S, left-justified, or right-justified output without firmware - reduces boot-time dependencies |
| 5-V tolerant digital inputs | RXIN, RST, FMT0/1, PSCK0/1, CKSEL, RSV accept 0–5 V logic - simplifies interface to legacy or mixed-voltage systems |
| Actual sampling frequency calculator | FSOUT0/FSOUT1 provide binary-coded fS value - enables dynamic sample rate detection for adaptive audio processing |
Applications
| AV/DVD Receiver | Automotive Infotainment |
|---|---|
Use Scenario: Decoding digital audio streams from HDMI ARC, optical SPDIF, or coaxial inputs in home theater receivers. IC Role / Device Role / Timing Role: DIR9001PW acts as the primary S/PDIF receiver, recovering clock and extracting PCM data for multi-channel DACs. Use Value: Hardware-selectable I²S format and 50 ps jitter ensure bit-perfect playback across diverse source devices without software configuration. |
Use Scenario: Integrating premium audio into vehicle head units with optical TOSLINK inputs from rear-seat entertainment or Bluetooth codecs. IC Role / Device Role / Timing Role: DIR9001PW receives biphase data and generates low-jitter master clocks for automotive-grade DACs operating at –40°C to 85°C. Use Value: Extended –40°C start-up capability and IEC60958-3 compliance guarantee reliable audio decoding in harsh thermal environments. |
| Digital Television | High-End PC Sound Card |
Use Scenario: Extracting stereo or multichannel PCM from broadcast ATSC or DVB-T2 digital TV tuners. IC Role / Device Role / Timing Role: DIR9001PW serves as the front-end interface between tuner demodulator and audio SoC, handling variable-rate streams up to 108 kHz. Use Value: Continuous 28–108 kHz range and automatic fS calculation (FSOUT0/1) eliminate manual sample rate switching during channel changes. |
Use Scenario: Adding professional-grade S/PDIF input to PCIe or USB audio interfaces for studio recording and mastering. IC Role / Device Role / Timing Role: DIR9001PW recovers ultra-low-jitter clocks to drive high-resolution DACs (e.g., 192 kHz/24-bit), minimizing timing-induced distortion. Use Value: 50 ps rms jitter performance exceeds consumer-grade receivers, preserving transient accuracy critical for mastering applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital audio interface receiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DIR1703PWR | Same 28-pin TSSOP footprint; narrower supply (3.0–3.6 V); –25°C to 85°C range; non-compliant with IEC60958-3 jitter spec | Limited to commercial temperature grade; unsuitable for automotive or industrial deployments requiring extended thermal range | Select DIR1703PWR only if legacy design reuse is mandatory and IEC60958-3 compliance is not required. |
| CS8416-CZZR | 32-pin QFN; supports AES3 ID detection and auto-format recognition; higher power (12 mA vs 8.3 mA); requires microcontroller for configuration | Enables advanced features like channel status parsing and automatic protocol identification - adds firmware complexity but improves system intelligence | Choose CS8416-CZZR when application demands AES3 metadata extraction or dynamic format adaptation beyond hardware pin control. |
Compared with DIR1703PWR, DIR9001PW extends temperature range and adds IEC60958-3 compliance; compared with CS8416-CZZR, it trades configurability for zero-firmware operation and lower power - making DIR9001PW optimal for cost-sensitive, thermally demanding, or microcontroller-less designs.
Availability
DIR9001PW is available at Aetrix Electronics and suitable for AV/DVD receivers, automotive infotainment systems, and digital television platforms requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for DIR9001PW 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 signal chain solutions.
The DIR9001PW belongs to TI's high-fidelity audio interface product line, engineered specifically for robust, low-jitter digital audio reception in automotive, broadcast, and consumer electronics where reliability and standards compliance are critical.
FAQ
What is the minimum sampling frequency the DIR9001PW can recover?
The DIR9001PW supports biphase input signals from 28 kHz to 108 kHz. Its minimum operational sampling frequency is 28 kHz - validated per IEC60958-3 and confirmed in the SLES198A datasheet Section 7.6. This enables compatibility with specialized broadcast and archival audio formats below standard CD rate.
Does the DIR9001PW require an external crystal or resonator to function?
No, the DIR9001PW does not require an external crystal or resonator for basic decode operation. It recovers clock and data directly from the biphase input (RXIN). An external 24.576-MHz source on XTI is optional - needed only for the internal sampling frequency calculator or when using XTI as the system clock source.
How does the DIR9001PW handle clock source switching between PLL and XTI modes?
Clock source selection is controlled by the CKSEL pin: low selects PLL-recovered clock (SCKO = 128fS–512fS), high selects XTI source. The DIR9001PW datasheet explicitly states clock continuity during transition is *not assured*, so system designers must implement glitch-free handover externally if required.
Is the DIR9001PW pin-compatible with the DIR1703?
Yes, the DIR9001PW has equivalent pin assignments to the DIR1703 per Table 2 in the SLES198A datasheet. All I/O functions map one-to-one, including RXIN, SCKO, BCKO, LRCKO, DOUT, RST, FILT, and CKSEL - enabling drop-in replacement in existing TSSOP-28 layouts with no PCB changes.
What is the purpose of the FSOUT0 and FSOUT1 pins on the DIR9001PW?
FSOUT0 and FSOUT1 are binary-coded outputs indicating the actual locked sampling frequency (fS). Together they encode four discrete ranges (e.g., 28–47.9 kHz, 48–63.9 kHz, etc.), enabling host processors to dynamically adapt audio processing without polling or complex decoding - a key feature for multi-standard broadcast receivers.
DIR9001PW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 28-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Audio Receiver
- Applications:
- Audio, Musical Instruments
- Number of Channels:
- 1
- Interface:
- I2S
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Specifications:
- 28kHz ~ 108kHz
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
DIR9001PW FAQ
1.How can I place an order for DIR9001PW through Aetrix?
Please submit a Request for Quotation (RFQ) for DIR9001PW 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 DIR9001PW reliable?
The price and inventory of DIR9001PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DIR9001PW is usually 5 days.
3.What payment methods are accepted for DIR9001PW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DIR9001PW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DIR9001PW?
DIR9001PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DIR9001PW 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 DIR9001PW?
For technical support, including DIR9001PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DIR9001PW requirements.
6.How does Aetrix verify that DIR9001PW is sourced from the original manufacturer or authorized distributors?
All DIR9001PW 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 DIR9001PW meets industry standards.
7.What is the process for return or replacement of DIR9001PW?
All DIR9001PW units undergo pre-shipment inspection (PSI). If there is an issue with DIR9001PW, 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 DIR9001PW part is unused and in its original packaging.
Return procedure for DIR9001PW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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