Texas Instruments DS90UH925QSQ/NOPB

Overview

DS90UH925QSQ/NOPB from Texas Instruments is an automotive-grade FPD-Link III serializer IC that converts 24-bit RGB888 video with HS/VS/DE timing and stereo I2S audio into a single AC-coupled differential CML serial stream. It supports 720p resolution at 5–85 MHz PCLK, embeds HDCP 1.4 encryption with on-chip key storage, and operates from a single 3.3 V supply with 1.8 V or 3.3 V LVCMOS I/O. It targets secure in-vehicle display links between graphics processors and LCD modules.

For engineers reviewing the DS90UH925QSQ/NOPB datasheet, DS90UH925QSQ/NOPB pinout, DS90UH925QSQ/NOPB application, or DS90UH925QSQ/NOPB equivalent, this page delivers verified technical context, exact pin functions, real-world automotive use cases, validated alternatives, and supply-chain support for production deployment in AEC-Q100 Grade 2 systems.

Technical Context

The DS90UH925QSQ/NOPB implements a parallel-to-serial conversion architecture with integrated HDCP cipher engine, DC-balanced scrambling, and embedded clock recovery. It processes up to 24 RGB data bits plus HS, VS, DE, and dual-channel I2S audio into a 35-bit symbol per PCLK cycle, achieving line rates from 525 Mbps to 2.975 Gbps.

Its bidirectional control interface uses the same FPD-Link III differential pair for full-duplex I²C communication (SCL/SDA) and status reporting (INTB), eliminating separate control wires. The serializer supports backward compatibility with FPD-Link II deserializers and includes programmable GPIOs, power-down mode (PDB), and MODE_SEL configuration for color depth and audio channel selection.

Key Specifications

Pinout & Package

DS90UH925QSQ/NOPB uses a 48-pin WQFN package (7.0 mm × 7.0 mm) with exposed thermal pad (DAP) requiring ≥9 vias to ground plane. Pin functions are validated per TI SNLS336J datasheet Rev J.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar FPD-Link III serializer applications.

Compared with DS90UH925Q-Q1 and DS90UH927QSQ/NOPB, the DS90UH925QSQ/NOPB delivers identical functionality and qualification in a RoHS-compliant package, while avoiding unnecessary complexity and cost of 1080p-capable variants in 720p-optimized automotive display architectures.

Availability

DS90UH925QSQ/NOPB is available at Aetrix Electronics and suitable for automotive navigation displays, rear seat entertainment systems, and digital instrument clusters requiring stable component supply, AEC-Q100 compliance, and long-term lifecycle support.

Supply support for DS90UH925QSQ/NOPB 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 automotive electronics, with decades of experience in high-reliability interface solutions.

The DS90UH925QSQ/NOPB belongs to TI's FPD-Link III automotive serializer family, designed specifically for secure, low-EMI, high-bandwidth video transmission in safety-critical vehicle display systems.

FAQ

What is the primary function of the DS90UH925QSQ/NOPB in an automotive display system?

The DS90UH925QSQ/NOPB serves as an FPD-Link III serializer that converts parallel RGB888 video with HS/VS/DE timing and stereo I2S audio into a single AC-coupled differential CML stream. It embeds HDCP 1.4 encryption and is used between graphics processors and LCD modules in automotive navigation, rear-seat, and instrument cluster displays. Its core role is secure, low-skew, high-integrity video transport over compact cabling.

Does the DS90UH925QSQ/NOPB support backward compatibility with older deserializers?

Yes, the DS90UH925QSQ/NOPB supports backward compatibility with FPD-Link II deserializers such as the DS90UR906Q and DS90UR908Q. This interoperability is implemented at the physical layer and protocol level, allowing reuse of existing deserializer hardware in legacy systems without PCB changes-though HDCP features require matching deserializer support.

How does the DS90UH925QSQ/NOPB handle power management in automotive environments?

The DS90UH925QSQ/NOPB includes a dedicated PDB (Power-Down) pin that enables ultra-low-power states. When PDB is driven low, the device shuts down its PLL, forces CML outputs HIGH, resets internal registers, and reduces supply current to ~1 µA. It also supports auto power-down mode triggered by loss of PCLK, making it suitable for start-stop vehicle architectures where display subsystems must minimize quiescent draw.

What are the key electrical requirements for the DOUT+/DOUT− outputs of the DS90UH925QSQ/NOPB?

The DOUT+/DOUT− outputs of the DS90UH925QSQ/NOPB require AC coupling via 0.1 µF capacitors, 100 Ω differential termination, and proper common-mode filtering via the CMF pin (0.1 µF to GND). They deliver 1.25 Vpp typical differential swing with <130 ps transition times and <0.3 UI total jitter at 85 MHz PCLK-ensuring signal integrity over 10 m STP cables in noisy automotive environments.

Can the DS90UH925QSQ/NOPB be used without HDCP functionality enabled?

Yes, the DS90UH925QSQ/NOPB operates fully functional in non-HDCP mode. HDCP activation is controlled via configuration registers and requires handshake with a compliant deserializer (e.g., DS90UH926Q-Q1). In open-content applications-such as internal diagnostics or non-protected UI overlays-the IC transmits unencrypted video/audio with identical timing, latency, and electrical performance as in HDCP mode.