Texas Instruments DS92LX2122SQE/NOPB

Overview

DS92LX2122SQE/NOPB from Texas Instruments is a Channel Link III deserializer IC that converts high-speed serial data (10–50 MHz input clock) into 21-bit parallel LVCMOS outputs (18-bit RGB666 + HS/VS/DE) for display interfaces. It supports AC-coupled shielded twisted-pair links up to 10 meters, embeds clock recovery with DC-balanced coding, and integrates programmable receive equalization and spread-spectrum clocking for EMI reduction in industrial touchscreens and medical imaging systems.

For engineers reviewing the DS92LX2122SQE/NOPB datasheet, DS92LX2122SQE/NOPB pinout, DS92LX2122SQE/NOPB application, or DS92LX2122SQE/NOPB equivalent, key selection criteria include its 48-pin WQFN (RHS) package, I²C-configurable bi-directional control channel, LOCK status reporting, and support for 1.8V/3.3V I/O with integrated termination resistors.

Technical Context

The DS92LX2122SQE/NOPB implements a CDR-based architecture with embedded clock recovery, eliminating the need for a reference clock at the deserializer. Its receiver includes programmable equalization to compensate for interconnect loss over long cables, and it supports staggered output drive strength control (RDS) to reduce simultaneous switching noise.

It features a full-duplex bi-directional control channel compliant with I²C protocol (100 kHz), enabling remote configuration of both serializer and deserializer via SDA/SCL. The device provides AT-speed BIST with PASS/LOCK outputs for real-time link integrity validation and supports sleep mode via PDB to minimize IDD during idle periods.

Key Specifications

Pinout & Package

DS92LX2122SQE/NOPB is housed in a 48-pin WQFN package (RHS footprint, 7 mm × 7 mm, 0.5 mm pitch) with exposed thermal pad (DAP = GND). Pin assignments are validated per TI SNLS330J Rev J (January 2014).

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS92LX2122SQE/NOPB, DS92LV0422MTDX/NOPB offers lower power but sacrifices cable reach and diagnostics, while SN65LVDS301PW lacks clock embedding and system-level configurability-making DS92LX2122SQE/NOPB uniquely suited for AC-coupled, long-reach, I²C-managed display links.

Availability

DS92LX2122SQE/NOPB is available at Aetrix Electronics and suitable for industrial touchscreen interfaces, medical imaging displays, and automotive infotainment head units requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DS92LX2122SQE/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 solutions for industrial, automotive, and communications markets.

The DS92LX2122SQE/NOPB belongs to TI's Channel Link III chipset family, designed specifically for high-reliability, long-cable video transport in noise-sensitive environments with integrated diagnostics and EMI mitigation.

FAQ

What is the function of the LOCK pin on the DS92LX2122SQE/NOPB?

The LOCK pin on the DS92LX2122SQE/NOPB is an active-high LVCMOS output indicating successful phase lock of the internal CDR circuit. When LOCK = H, the deserializer has achieved stable clock recovery and parallel outputs (ROUT[20:0], PCLK) are valid and synchronized. During power-up or link loss, LOCK goes low, signaling the host system to suspend display updates until lock reacquisition. This behavior is documented in TI SNLS330J Section 7.3.

Does the DS92LX2122SQE/NOPB require an external reference clock?

No, the DS92LX2122SQE/NOPB does not require an external reference clock. It uses embedded clock technology with a built-in CDR to recover timing directly from the incoming Channel Link III serial stream on RIN+/RIN−. This eliminates clock distribution skew and simplifies system design-confirmed in the Functional Description section of TI SNLS330J Rev J.

Can the DS92LX2122SQE/NOPB operate with a 3.3V I/O supply?

Yes, the DS92LX2122SQE/NOPB supports 3.3V-compatible I/O on its ROUT[20:0] and PCLK outputs via dedicated VDDOR1/2/3 supplies. These pins tolerate 3.0 V to 3.6 V, allowing direct interfacing with 3.3V timing controllers without level shifters-verified in the Recommended Operating Conditions table (Section 6.2) and LVCMOS DC specifications (Section 7.2) of SNLS330J.

How is the DS92LX2122SQE/NOPB configured for different cable lengths?

The DS92LX2122SQE/NOPB is configured for varying cable lengths using its programmable receive equalization, controlled via I²C register writes to address 0x04h (EQ_GAIN). Higher gain settings compensate for greater insertion loss in longer cables (e.g., 10 m), while lower gain prevents overshoot on short runs. Configuration is performed through the SDA/SCL interface per Table 8–12 in TI SNLS330J.

What is the purpose of the BISTEN and PASS pins on the DS92LX2122SQE/NOPB?

The BISTEN pin enables AT-speed Built-In Self-Test mode on the DS92LX2122SQE/NOPB, initiating PRBS-7 pattern validation of the serial link. The PASS pin outputs high when zero bit errors are detected over the test interval, providing hardware-level link integrity confirmation. Both pins are LVCMOS and are defined in Sections 7.3.12–7.3.13 of TI SNLS330J Rev J.