Texas Instruments DS92LV0421SQX/NOPB

Overview

DS92LV0421SQX/NOPB from Texas Instruments is a Channel Link II serializer IC that converts 24-bit RGB video + 3-bit control (5-channel LVDS parallel interface) into a high-speed CML serial stream over a single AC-coupled STP pair. It operates from 10 MHz to 75 MHz pixel clock, supports 1.8 V or 3.3 V LVCMOS I/O, integrates DC-balancing and data scrambling, and targets embedded display interconnects up to 10 m.

For engineers reviewing the DS92LV0421SQX/NOPB datasheet, DS92LV0421SQX/NOPB pinout, DS92LV0421SQX/NOPB application, or DS92LV0421SQX/NOPB equivalent, key selection criteria include its 5-channel LVDS-to-CML conversion capability, programmable VOD/de-emphasis for cable loss compensation, integrated BIST for link integrity validation, and compatibility with DS92LV0422 deserializer in RGB display and frame grabber systems.

Technical Context

The DS92LV0421SQX/NOPB implements a full Channel Link II serializer with 4 data + 1 clock LVDS parallel inputs, internal PLL-based clock multiplication, and a single CML differential serial output. Its DC-balancing encoder and scrambler reduce EMI and enable AC coupling over lossy cables.

It features pin- and register-configurable functions including VODSEL (±300 mV or ±450 mV CML output), DE-EMPH (de-emphasis enable), MAPSEL (data mapping), and CONFIG[1:0] (interfacing mode selection for DS92LV0422/DS92LV2422/DS90UR124). Power-down (PDB) and BISTEN are dedicated control inputs.

Key Specifications

Pinout & Package

DS92LV0421SQX/NOPB uses a 36-pin WQFN package (NJK) with 6.0 mm × 6.0 mm body size and an exposed thermal pad (DAP) requiring ≥9 vias to ground plane for thermal management.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS92LV2421 and DS90UB925QSQ, DS92LV0421SQX/NOPB uniquely balances cable reach (10 m), EMI mitigation (scrambling + DC-balance), and protocol simplicity (no external clock or encryption stack), making it optimal for industrial and medical embedded video links.

Availability

DS92LV0421SQX/NOPB is available at Aetrix Electronics and suitable for medical imaging systems, industrial frame grabbers, RGB display interfaces, and security surveillance cameras requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for DS92LV0421SQX/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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

DS92LV0421SQX/NOPB belongs to TI's Channel Link II interface product line, designed specifically to upgrade legacy LVDS display and imaging interconnects to embedded-clock serial architecture with improved noise immunity and cable reach.

FAQ

What is the primary function of the DS92LV0421SQX/NOPB in a video interface system?

The DS92LV0421SQX/NOPB acts as a Channel Link II serializer that converts a 5-channel LVDS parallel interface (4 data + 1 clock) carrying 24-bit RGB video and control signals into a high-speed CML serial stream. It enables noise-immune transmission over a single AC-coupled STP pair up to 10 meters, reducing connector count and EMI compared to wide parallel buses. This function is central to the DS92LV0421SQX/NOPB's role in embedded display and imaging systems.

Does the DS92LV0421SQX/NOPB require an external reference clock to operate?

No, the DS92LV0421SQX/NOPB does not require an external reference clock. It recovers timing from the incoming LVDS parallel clock (RXCLKIN±) and uses an internal PLL to generate the high-speed serial bit clock. This self-contained clocking architecture simplifies system design and eliminates clock distribution challenges. The DS92LV0421SQX/NOPB achieves full operation with only the parallel LVDS video interface and power supplies.

How is cable length supported by the DS92LV0421SQX/NOPB, and what features enable longer reach?

The DS92LV0421SQX/NOPB supports up to 10 m of 100 Ω STP cable using programmable de-emphasis and dual CML output voltage levels (±300 mV or ±450 mV). Its integrated DC-balancing encoder and data scrambler prevent baseline wander and reduce EMI, enabling reliable AC coupling. These features collectively extend usable distance beyond standard LVDS while maintaining signal integrity - a core capability of the DS92LV0421SQX/NOPB.

Can the DS92LV0421SQX/NOPB be configured via pins or only through I²C?

The DS92LV0421SQX/NOPB supports both pin-strapping and I²C register configuration. Critical modes like CONFIG[1:0] (target deserializer), MAPSEL (data mapping), VODSEL (output amplitude), and PDB (power-down) are controlled directly by LVCMOS inputs. Optional I²C (SDA/SCL) allows dynamic reconfiguration of registers such as DE-EMPH and BIST settings. This dual-mode flexibility makes the DS92LV0421SQX/NOPB adaptable to fixed-function and field-upgradable designs.

What is the purpose of the BISTEN pin on the DS92LV0421SQX/NOPB, and how is link integrity verified?

The BISTEN pin on the DS92LV0421SQX/NOPB enables built-in self-test mode, activating an at-speed pseudo-random bit sequence generator that exercises the entire serial link path. While DS92LV0421SQX/NOPB generates the test pattern, link pass/fail status is reported via the PASS pin on the companion DS92LV0422 deserializer. This hardware-accelerated diagnostic capability validates physical-layer integrity without host processor intervention - a key reliability feature of the DS92LV0421SQX/NOPB chipset.