Texas Instruments DS90UA102TRHSTQ1

Overview

DS90UA102TRHSTQ1 from Texas Instruments is an AEC-Q100 Grade 2 automotive-qualified digital audio deserializer that receives high-speed serialized data over a single coaxial or shielded twisted-pair cable and recovers up to eight channels of I²S/TDM audio, system clock (10–50 MHz), bit clock, word clock, and bidirectional I²C control. It operates from a 1.8V core supply with 1.8V/3.3V I/O support and delivers <15 µs end-to-end latency in active noise cancellation and infotainment head units.

For engineers reviewing the DS90UA102TRHSTQ1 datasheet, DS90UA102TRHSTQ1 pinout, DS90UA102TRHSTQ1 application, or DS90UA102TRHSTQ1 equivalent, this page provides verified functional role, validated pin-level circuit roles, confirmed automotive-grade timing performance, and real-world interface constraints for multi-channel audio link design in harsh EMI environments.

Technical Context

The DS90UA102TRHSTQ1 implements adaptive equalization on its LVDS serial input (RIN+/RIN−) to compensate for cable losses up to 15 m, supporting line rates up to 1.4 Gbps with deterministic jitter reduction. Its CDR extracts embedded clock and reconstructs parallel LVCMOS outputs including DOUT[7:0], LRCK, BCK, and SCK with <22 ms lock time and <35 ps receiver clock jitter at 50 MHz.

It integrates a bidirectional I²C-compatible control channel over the same physical link, enabling remote register access to the companion DS90UA101-Q1 serializer. Four GPIOs and four GPOs provide local and forward-channel signal routing, while PASS and LOCK status pins deliver real-time link health monitoring without host intervention.

Key Specifications

Pinout & Package

DS90UA102TRHSTQ1 uses a 48-pin WQFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad (DAP). Pin assignment follows TI's standardized LLP layout optimized for high-speed differential routing and ESD robustness on RIN+/RIN−.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digital audio deserializer applications.

Compared with DS90UA102TRHSTQ1, DS90UB928QSQX/NOPB adds video capability at the expense of audio-specific features like flexible TDM slot mapping and integrated adaptive EQ, while MAX9278GTJ+T prioritizes ruggedness and reach over audio protocol agility and dual-voltage I/O support.

Availability

DS90UA102TRHSTQ1 is available at Aetrix Electronics and suitable for automotive infotainment head units, active noise cancellation systems, distributed multi-channel audio subsystems, and rear-seat entertainment modules requiring stable component supply across extended temperature and ESD stress conditions.

Supply support for DS90UA102TRHSTQ1 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 connectivity solutions for automotive, industrial, and communications markets.

The DS90UA102TRHSTQ1 belongs to TI's FPD-Link III automotive serializer/deserializer product line, engineered specifically to replace bulky multi-wire harnesses with robust, low-latency, ESD-hardened serial links for safety-critical and high-fidelity audio systems.

FAQ

What is the primary function of the DS90UA102TRHSTQ1 in an automotive audio system?

The DS90UA102TRHSTQ1 functions as a high-speed digital audio deserializer that converts a serialized FPD-Link III stream-received over coaxial or shielded twisted-pair cable-into parallel LVCMOS audio outputs (DOUT[7:0]), timing signals (LRCK, BCK, SCK), and bidirectional I²C control. In DS90UA102TRHSTQ1-based systems, it enables centralized audio processing with distributed amplification while maintaining <15 µs latency and AEC-Q100 Grade 2 reliability.

Does the DS90UA102TRHSTQ1 support both I²S and TDM audio formats?

Yes, the DS90UA102TRHSTQ1 natively supports both I²S (stereo) and TDM (multi-channel) digital audio formats. It recovers up to eight independent audio channels from the serialized stream and outputs them on DOUT[7:0] with frame-sync (LRCK) and bit-clock (BCK) aligned to the selected format. Configuration is handled via internal registers, and the DS90UA102TRHSTQ1 datasheet confirms full TDM slot mapping flexibility for up to 32 time slots per frame.

How does the adaptive equalization in the DS90UA102TRHSTQ1 improve system robustness?

The DS90UA102TRHSTQ1 implements adaptive equalization on its RIN+/RIN− LVDS inputs to dynamically compensate for frequency-dependent attenuation in long interconnects. This allows reliable operation over 15 m of coax or shielded twisted-pair cable at 1.4 Gbps, reducing deterministic jitter induced by cable loss and maintaining bit error rate (BER) below 10⁻¹². The DS90UA102TRHSTQ1 achieves this without requiring manual tuning or external components.

Can the DS90UA102TRHSTQ1 operate with a 3.3V I/O supply while using a 1.8V core supply?

Yes, the DS90UA102TRHSTQ1 supports mixed-supply operation: VDD, VDDD, VDDPLL, and VDDR require 1.8V ±5%, while VDDIO can be independently set to either 1.8V ±5% or 3.3V ±10%. This dual-voltage capability allows direct interfacing with legacy 3.3V audio DACs or microcontrollers without level shifters. The DS90UA102TRHSTQ1's register-controlled VDDIO Mode bit (0x03[4]) auto-detects or manually selects the correct I/O voltage domain.

What is the purpose of the PASS and LOCK pins on the DS90UA102TRHSTQ1?

The PASS pin indicates error-free payload transmission (PASS = H), toggling low momentarily for each parity error detected in normal or BIST mode. The LOCK pin signals PLL lock status (LOCK = H), confirming that the recovered clock is stable and all audio outputs are valid. Both are open-drain LVCMOS outputs used for real-time system diagnostics and fail-safe behavior in DS90UA102TRHSTQ1-based automotive designs - for example, muting amplifiers until LOCK is asserted.