Texas Instruments DS90UR903QSQX/NOPB

Overview

DS90UR903QSQX/NOPB from Texas Instruments is an automotive-grade FPD-Link II serializer IC that converts 21-bit parallel RGB666 + HS/VS/DE video data into a single high-speed CML serial stream for transmission over one differential pair. It supports 10–43 MHz PCLK, delivers up to 903 Mbps throughput, embeds clock via DC-balanced coding, and operates from a single 1.8 V supply. It is used in central information displays and navigation systems requiring ESD-hardened, AC-coupled interconnects up to 10 meters.

For engineers reviewing the DS90UR903QSQX/NOPB datasheet, DS90UR903QSQX/NOPB pinout, DS90UR903QSQX/NOPB application, or DS90UR903QSQX/NOPB equivalent, key selection criteria include its 40-pin WQFN package, I²C-configurable PLL with no external reference clock required on the deserializer side, LOCK output for link integrity validation, integrated 100 Ω CML termination, and AEC-Q100 Grade 2 qualification for −40°C to +105°C operation.

Technical Context

The DS90UR903QSQX/NOPB implements a parallel-to-serial conversion architecture using embedded clock recovery and 8b/10b-like DC-balanced encoding to enable AC-coupled transmission. Its CML transmitter drives a single shielded twisted-pair with programmable equalization compensation on the deserializer side.

It features a fully configurable I²C interface (SCL/SDA), hardware MODE pin for I²C enable, resistor-programmable device ID, and dedicated PDB pin for power-down control with full register reset. The PLL locks autonomously without requiring a reference clock at the remote deserializer.

Key Specifications

Pinout & Package

DS90UR903QSQX/NOPB is housed in a 40-pin WQFN (RTA) package measuring 6.00 mm × 6.00 mm with exposed thermal pad (DAP = GND). The package supports fine-pitch PCB routing and efficient thermal dissipation via bottom-side grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS90UR905QSQX/NOPB and DS90UB925QSQX/NOPB, the DS90UR903QSQX/NOPB offers optimal cost and power efficiency for WXGA-class automotive displays within 10 m, while maintaining full AEC-Q100 Grade 2 compliance and minimal layout overhead.

Availability

DS90UR903QSQX/NOPB is available at Aetrix Electronics and suitable for automotive display systems, central information clusters, and navigation units requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for DS90UR903QSQX/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 connectivity technologies for automotive, industrial, and consumer markets.

The DS90UR903QSQX/NOPB belongs to TI's FPD-Link II serializer product line, designed specifically for cost-sensitive, high-reliability automotive video interfaces requiring robust ESD performance, low EMI, and simplified cabling between graphics controllers and LCD modules.

FAQ

What is the primary function of the DS90UR903QSQX/NOPB in an automotive display system?

The DS90UR903QSQX/NOPB serves as an FPD-Link II serializer that converts 21-bit parallel video data (RGB666 + HS/VS/DE) from a graphics controller into a high-speed CML serial stream for transmission over a single differential pair. It enables compact, low-EMI, and ESD-hardened video links up to 10 meters in automotive central displays and navigation systems, eliminating skew and reducing cable complexity compared to parallel interfaces.

Does the DS90UR903QSQX/NOPB require an external reference clock for PLL lock?

No, the DS90UR903QSQX/NOPB does not require an external reference clock for PLL lock. Its PLL recovers timing directly from the incoming PCLK signal and achieves lock autonomously. This eliminates the need for additional clock distribution circuitry on the host side and simplifies system design-particularly beneficial in space-constrained automotive ECUs where clock routing adds noise and layout complexity.

How does the LOCK pin on the DS90UR903QSQX/NOPB improve system reliability?

The LOCK pin on the DS90UR903QSQX/NOPB provides real-time status of PLL lock acquisition: it asserts HIGH when the internal PLL is locked and serial output is stable, and LOW otherwise. This allows the host system to validate link integrity before enabling display output, preventing blank screens or corrupted frames during power-up or cable disconnect/reconnect events-critical for functional safety in automotive instrument clusters.

Can the DS90UR903QSQX/NOPB interface with both 1.8 V and 3.3 V logic systems?

Yes, the DS90UR903QSQX/NOPB supports dual-voltage I/O operation: its VDDIO pin accepts either 1.8 V ±5% or 3.3 V ±10%, allowing direct connection to graphics controllers operating at either logic level. The LVCMOS inputs (DIN[20:0], PCLK, MODE, PDB) and outputs (SCL, SDA) are fully compatible with both voltages, eliminating level-shifter components and reducing BOM cost in mixed-voltage automotive designs.

What packaging and thermal characteristics define the DS90UR903QSQX/NOPB?

The DS90UR903QSQX/NOPB uses a 40-pin WQFN (RTA) package measuring 6.00 mm × 6.00 mm with an exposed thermal pad (DAP) that must be soldered to ground. Its junction-to-ambient thermal resistance (RθJA) is 31.9°C/W, and it supports continuous operation from −40°C to +105°C. The DAP-to-ground via array (≥16 vias) ensures effective heat dissipation in thermally constrained automotive PCB layouts.