Texas Instruments DS99R124AQSQ/NOPB

Overview

DS99R124AQSQ/NOPB from Texas Instruments is an automotive-grade FPD-Link II to FPD-Link deserializer IC that converts a single-pair AC-coupled serial stream (5–43 MHz, 140 Mbps–1.2 Gbps) into three LVDS data channels + one LVDS clock channel and three low-speed LVCMOS outputs. It recovers embedded clock and RGB666 + VS/HS/DE signals without reference clock or training sequence, supporting 18-bit color displays up to WVGA resolution in automotive navigation and infotainment systems.

For engineers reviewing the DS99R124AQSQ/NOPB datasheet, DS99R124AQSQ/NOPB pinout, DS99R124AQSQ/NOPB application, or DS99R124AQSQ/NOPB equivalent, key selection considerations include its AEC-Q100 Grade 2 qualification, adjustable input equalization for STP cable up to 10 m, spread-spectrum clocking (SSCG), dual-voltage I/O (1.8 V / 3.3 V), and real-time LOCK status reporting for display link integrity monitoring.

Technical Context

The DS99R124AQSQ/NOPB implements a DC-balanced deserialization architecture with embedded clock recovery, enabling lock acquisition on random data without SYNC patterns or external reference clocks. Its PLL achieves <8 ms lock time at 43 MHz with SSCG enabled and supports deterministic jitter suppression via adjustable receive equalization (EQ gain: ~1.6 dB or ~13 dB).

It delivers FPD-Link output compliance with LVDS electrical standards (±250 mV / ±400 mV differential voltage selectable via VODSEL), includes BIST mode with PASS reporting, and integrates configurable LVCMOS control interfaces (I²C-compatible optional bus, strap pins for SSC[2:0], LFMODE, OSS_SEL) alongside power-down (PDB) and output-enable (OEN) logic.

Key Specifications

Pinout & Package

The DS99R124AQSQ/NOPB is housed in a 48-pin WQFN package (RHS0048A) with exposed thermal pad (DAP = GND). Pin assignments are validated per TI SNLS342A datasheet Rev. April 2013 and support AC-coupled STP interconnect, LVDS output termination (100 Ω), and strap-pin configuration for SSCG, VODSEL, and sleep-state control.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS99R124AQSQ/NOPB, DS99R124QSQ/NOPB offers identical performance in different packaging, while DS99R125AQSQ/NOPB extends bandwidth and jitter resilience-making it suitable for next-generation displays without PCB redesign.

Availability

DS99R124AQSQ/NOPB is available at Aetrix Electronics and suitable for automotive navigation displays, infotainment centers, and digital instrument clusters requiring stable component supply, AEC-Q100 compliance, and long-cable FPD-Link II interoperability.

Supply support for DS99R124AQSQ/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, with deep expertise in automotive electronics and high-speed interface solutions.

The DS99R124AQSQ/NOPB belongs to TI's FPD-Link II serializer/deserializer product line, designed specifically for robust, low-EMI video transmission in automotive display systems-from instrument clusters to rear-seat entertainment.

FAQ

What is the maximum supported cable length for DS99R124AQSQ/NOPB with STP interconnect?

The DS99R124AQSQ/NOPB supports AC-coupled STP interconnect up to 10 meters in length, enabled by its adjustable input equalization (EQ gain up to ~13 dB) and robust jitter tolerance (>0.45 UI at 43 MHz). Performance depends on cable quality and termination; TI recommends 100 nF AC coupling capacitors and proper 100 Ω differential termination at both ends. For longer runs, consider DS99R125AQSQ/NOPB with extended equalization.

Does DS99R124AQSQ/NOPB require an external reference clock to achieve lock?

No, DS99R124AQSQ/NOPB does not require an external reference clock. Its embedded clock recovery PLL achieves FAST random data lock on arbitrary patterns without training sequences or SYNC characters. The device extracts timing directly from the FPD-Link II serial stream, simplifying system design and reducing component count. LOCK pin asserts HIGH once stable lock is achieved.

How does the VODSEL pin affect DS99R124AQSQ/NOPB LVDS output performance?

The VODSEL pin selects differential output voltage: LOW sets ±250 mV (500 mV_p-p) for short cables and low-EMI applications; HIGH sets ±400 mV (800 mV_p-p) for longer cables or de-emphasis scenarios. This adjustment directly impacts noise margin and signal integrity-TI recommends VODSEL = HIGH for >5 m STP runs and VODSEL = LOW for board-to-board connections within EMI-sensitive zones.

Can DS99R124AQSQ/NOPB operate with both 1.8 V and 3.3 V I/O supplies simultaneously?

Yes, DS99R124AQSQ/NOPB supports dual-voltage I/O via VDDIO, which may be set to either 1.8 V ±5% or 3.3 V ±10%. All LVCMOS inputs (PDB, OEN, VODSEL, etc.) and outputs (LOCK, OS[2:0], PASS) are compatible with the selected VDDIO level. This flexibility allows seamless interfacing with 1.8 V display controllers or 3.3 V microcontrollers without level-shifting circuitry.

What is the purpose of the CMF pin on DS99R124AQSQ/NOPB?

The CMF (Common-Mode Filter) pin provides access to the center-tap of the internal FPD-Link II input termination. Connecting a ≥4.7 µF capacitor from CMF to GND enhances common-mode noise rejection-critical in automotive environments with high EMI. This improves receiver immunity to coupled noise on the STP pair without affecting differential signal integrity or requiring external components in basic implementations.