Texas Instruments DS92LV0411SQE

Overview

DS92LV0411 from National Semiconductor is a Channel Link II serializer IC that converts a 5–50 MHz parallel LVDS interface (4 data + 1 clock, 24-bit + 3 control) into a high-speed CML serial stream over a single differential pair. It supports AC-coupled STP interconnect up to 10 m, features programmable de-emphasis and DC-balanced scrambling, and operates across –40°C to +85°C with 1.8 V core and 1.8/3.3 V I/O supply flexibility. It is used in embedded video links between FPGAs and displays.

For engineers reviewing the DS92LV0411 datasheet, DS92LV0411 pinout, DS92LV0411 application, or DS92LV0411 equivalent, key selection criteria include its 5–50 MHz LVDS input clock range, ±300/±450 mV selectable LVDS output voltage, integrated CML transmitter with 140 Mbps–1.4 Gbps line rate, AT-SPEED BIST capability, and I²C/pin-strapped configuration support.

Technical Context

The DS92LV0411 implements a full Channel Link II serializer with embedded clock recovery-free operation on the deserializer side (paired with DS92LV0412), enabling plug-and-go link initialization without external reference clocks or training sequences. Its CML transmitter includes adjustable de-emphasis (via De-Emph pin or register) and selectable output VOD (±300 mV or ±450 mV), supporting long-reach transmission over lossy media.

Internally, it performs data scrambling and DC-balanced encoding to ensure signal integrity for AC-coupled interconnects, while maintaining strict timing alignment across all 24 data bits and 3 control signals (VS, HS, DE). The device supports dual LVDS mapping modes (MSB/LSB on RxIN3) via MAPSEL and offers configurable operating modes through CONFIG[1:0] pins for interoperability with DS92LV2411/2412, DS90UR124, or DS90C124.

Key Specifications

Pinout & Package

DS92LV0411 is housed in a 36-pin LLP package (6.0 × 6.0 × 0.8 mm, 0.5 mm pitch) with exposed thermal pad (DAP) requiring ≥9 vias to ground plane. Power domains are segregated (VDDL, VDDP, VDDHS, VDDTX, VDDRX, VDDIO) to minimize noise coupling between logic, PLL, high-speed TX, and I/O sections.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS92LV2411, DS92LV0411 adds diagnostic capability and configurability at minor cost premium; compared with DS90UR124, it trades bandwidth and bit-width for proven interoperability, lower power, and simpler integration in established Channel Link II ecosystems.

Availability

DS92LV0411SQE is available at Aetrix Electronics and suitable for embedded display interface, industrial machine vision, and office automation applications requiring stable component supply, long-term manufacturability, and automotive-qualified temperature range (–40°C to +85°C).

Supply support for DS92LV0411SQE 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

National Semiconductor (now part of Texas Instruments) is a pioneer in high-speed interface ICs, known for robust analog and mixed-signal solutions serving industrial, medical, and communications markets.

The DS92LV0411 belongs to the Channel Link II serializer family, designed specifically to upgrade legacy parallel LVDS video interconnects to embedded-clock serial links-reducing EMI, trace count, and FPGA I/O usage while preserving timing determinism.

FAQ

What is the primary function of the DS92LV0411 in a video interface system?

The DS92LV0411 functions as a Channel Link II serializer that converts a parallel 5–50 MHz LVDS interface (24-bit data + 3 control signals) into a high-speed CML serial stream over a single differential pair. In a video system, it sits between an FPGA or ASIC and a serializer-deserializer link, enabling compact, low-EMI transmission to displays or image sensors. Its role is critical for maintaining timing integrity and signal fidelity across extended interconnects.

Does the DS92LV0411 require an external reference clock to operate?

No, the DS92LV0411 itself does not require an external reference clock - it operates from the incoming LVDS clock (RxCLKIN+/−). However, its paired deserializer DS92LV0412 achieves automatic lock to the embedded clock in the serial stream without any external reference. This "plug-and-go" behavior eliminates clock distribution complexity and makes the DS92LV0411 ideal for systems where clock tree design is constrained.

How does the DS92LV0411 support long-distance transmission over lossy media?

The DS92LV0411 supports long-distance transmission via three integrated features: (1) programmable transmit de-emphasis (controlled by De-Emph pin or register) to compensate for high-frequency loss; (2) data scrambling and DC-balanced encoding to maintain signal integrity under AC coupling; and (3) selectable ±300 mV or ±450 mV LVDS output voltage (via VODSEL) to improve noise margin. These allow reliable operation over 10 m STP cables as specified.

Can the DS92LV0411 be configured without using the I²C interface?

Yes, the DS92LV0411 can be fully configured using hardware strapping pins - including VODSEL (output voltage), De-Emph (de-emphasis), MAPSEL (LVDS bit mapping), CONFIG[1:0] (interfacing mode), and BISTEN (BIST enable). The I²C interface (SCL/SDA) is optional and used only for dynamic register access or advanced diagnostics; default operation requires no I²C controller.

What is the significance of the DAP (exposed thermal pad) in the DS92LV0411SQE package?

The DAP in the DS92LV0411SQE's 36-pin LLP package is a large metal thermal pad located centrally on the underside. It must be connected to the PCB ground plane using at least nine thermal vias to ensure effective heat dissipation and stable junction temperature. Proper DAP grounding is essential to meet the device's thermal resistance spec (θJC = 4.5 °C/W) and sustain continuous operation at full load within the –40°C to +85°C range.