Texas Instruments DS92LV3221TVS/NOPB

Overview

DS92LV3221TVS/NOPB from Texas Instruments is a 32-bit parallel-to-serial LVCMOS-to-LVDS serializer IC for high-speed embedded clock Channel Link II applications. It supports 20–50 MHz parallel clock input, delivers up to 1.6 Gbps application data payload across two embedded-clock LVDS differential pairs (TxOUT0±, TxOUT1±), and integrates DC-balance encoding, data randomization, and programmable pre-emphasis. It is used in machine-vision camera interfaces to transmit uncompressed image data over CAT-5 cables.

For engineers reviewing the DS92LV3221TVS/NOPB datasheet, DS92LV3221TVS/NOPB pinout, DS92LV3221TVS/NOPB application, or DS92LV3221TVS/NOPB equivalent, key selection considerations include its 64-pin TQFP package, LVDS output voltage control (VSEL), rising/falling edge clock strobe selection (R_FB), BIST enable capability, and compatibility with DS92LV3222 deserializer in point-to-point imaging links.

Technical Context

The DS92LV3221TVS/NOPB implements a parallel-to-serial conversion architecture with embedded clock recovery avoidance on transmit side - it embeds timing directly into the LVDS stream using DC-balanced 8b/10b-like encoding and scrambling. Its PLL locks to the external TxCLKIN (20–50 MHz), not incoming data, and drives two synchronized LVDS channels each carrying 20 bits per parallel clock cycle.

Signal integrity is enhanced via on-chip 100 Ω differential termination, selectable pre-emphasis (via PRE pin + external resistor), and VOD level control (VSEL selects 350–525 mV or 629–1000 mV differential swing). The device supports AC-coupled interconnect, requires no separate serial clock line, and achieves <500 ps LVDS output skew between channels.

Key Specifications

Pinout & Package

DS92LV3221TVS/NOPB is housed in a 64-pin TQFP (PAG) package with 0.5 mm pitch, thermally enhanced for industrial imaging applications. Pin assignments are fixed per TI SNLS319C Rev. April 2013.

Key Features

Applications

Equivalent & Alternatives

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

Compared with DS92LV040ATM/NOPB and MAX9249GTJ+T, DS92LV3221TVS/NOPB uniquely combines 32-bit width, embedded-clock LVDS, programmable pre-emphasis, and BIST in a single 64-pin TQFP - enabling cost-effective, high-fidelity machine-vision links without protocol translation or external equalization.

Availability

DS92LV3221TVS/NOPB is available at Aetrix Electronics and suitable for industrial imaging, medical endoscopy, security surveillance, and embedded vision controller applications requiring stable component supply and long-term manufacturability.

Supply support for DS92LV3221TVS/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, with decades of experience in high-speed interface ICs for industrial and imaging markets.

The DS92LV3221TVS/NOPB belongs to TI's Channel Link II SerDes product line, designed specifically to replace parallel buses in high-resolution imaging systems while maintaining low EMI, long cable reach, and plug-and-lock simplicity.

FAQ

What is the maximum supported cable length for DS92LV3221TVS/NOPB at 1.6 Gbps?

DS92LV3221TVS/NOPB supports up to 10 m over CAT-5 cable at 1.6 Gbps when configured with VSEL = H and PRE enabled via 15 kΩ resistor to GND. This is validated per TI SNLS319C test conditions using standard twisted-pair construction and proper AC coupling. Longer distances require reduced data rate or external equalization.

Does DS92LV3221TVS/NOPB require an external reference clock at the deserializer side?

No, DS92LV3221TVS/NOPB does not require an external reference clock at the deserializer side. It embeds clock information within the LVDS data stream, allowing the companion DS92LV3222 to achieve automatic "plug-and-lock" operation without training patterns or sync characters - a core feature confirmed in TI's functional description and timing diagrams.

Can DS92LV3221TVS/NOPB interface directly with a 1.8 V FPGA I/O bank?

Yes, DS92LV3221TVS/NOPB can interface directly with a 1.8 V FPGA I/O bank by connecting IOVDD to 1.8 V. Its TxIN[31:0] inputs meet 1.8 V LVCMOS thresholds (VIH ≥ 0.65 × IOVDD, VIL ≤ 0.35 × IOVDD), and output drive strength remains compliant under 1.8 V IOVDD per TI electrical characteristics table.

How is the DS92LV3221TVS/NOPB BIST function activated and verified?

DS92LV3221TVS/NOPB BIST is activated by driving BISTEN high; it then generates a known pseudorandom pattern and transmits it through the LVDS channels. Verification requires monitoring the BIST flag on the DS92LV3222 deserializer side - a match indicates link integrity. Full procedure is defined in TI SNLS319C Section 8.4.

What happens to DS92LV3221TVS/NOPB outputs during power-down mode?

When PDB is driven low, DS92LV3221TVS/NOPB places TxOUT0± and TxOUT1± into TRI-STATE, shuts down its PLL, and reduces supply current to ≤50 µA. All LVCMOS inputs remain high-impedance except PDB itself; no DC path exists from outputs to VDD or GND, ensuring safe hot-swap capability.