Texas Instruments LMH0031VS/NOPB

Overview

LMH0031VS/NOPB from Texas Instruments is an SMPTE 292M/259M digital video deserializer and descrambler IC that converts serial SDTV/HDTV video (270 Mbps–1.485 Gbps) into synchronized 10-bit or 20-bit parallel output, implements NRZI-to-NRZ conversion, automatic video format detection, and embeds ancillary data FIFO with masking control. It operates with 2.5V logic and 3.3V I/O supplies, delivers <500 µs VCO lock time at 1.485 Gbps, and targets broadcast-grade video routing and test equipment.

For engineers reviewing the LMH0031VS/NOPB datasheet, LMH0031VS/NOPB pinout, LMH0031VS/NOPB application, or LMH0031VS/NOPB equivalent, this page provides verified technical context on SMPTE-compliant CDR architecture, parallel FIFO depth configuration, EDH/CRC handling, LSB de-dithering, and LVDS/ECL-compatible serial input interface - all critical for SDI receiver design validation and system-level timing alignment.

Technical Context

The LMH0031VS/NOPB integrates a high-speed clock/data recovery (CDR) PLL with auto-detecting support for SMPTE 259M (270/360 Mbps), SMPTE 344M (540 Mbps), and SMPTE 292M (1.483/1.485 Gbps) serial rates, delivering parallel word-rate clocks (27–74.25 MHz) with ≤0.5 ns jitter (74.25 MHz). Its descrambler uses the X⁹+X⁴+1 polynomial per SMPTE standards and performs TRS character detection, LSB clipping per ITU-R BT.601, and format-dependent framing alignment.

It features dual-path parallel output: 20-bit DV[19:0] (HD luma/chroma split or SD duplicated) with adjustable 0–4-deep FIFO delay, and 10-bit AD[9:0] ancillary/control bus supporting register read/write via RD/WR and ANC/CTRL handshaking. The multi-function I/O port (IO[7:0]) enables BIST activation, TPG control, and real-time status monitoring without external microcontroller intervention.

Key Specifications

Pinout & Package

LMH0031VS/NOPB is housed in a 64-pin TQFP (Package Number PAG0064A), with exposed thermal pad, RoHS-compliant, and rated for 0°C to +70°C commercial operation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMH0031MTX/NOPB, LMH0031VS/NOPB offers identical functionality with a NiPdAu finish optimized for reliability in high-reliability broadcast enclosures; versus GS2971-IBE3, it trades 12G-SDI readiness for lower power, integrated BIST, and simpler register-level control - making it optimal for established SDI infrastructure upgrades.

Availability

LMH0031VS/NOPB is available at Aetrix Electronics and suitable for broadcast video routers, digital video test equipment, standards converters, and HDTV production switchers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for industrial deployment.

Supply support for LMH0031VS/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 high-performance signal chain solutions, with decades of leadership in broadcast video interface technology.

The LMH0031VS/NOPB belongs to TI's SMPTE-compliant video interface product line, engineered specifically for robust, low-latency serial digital video reception in professional broadcast, post-production, and test equipment.

FAQ

What video standards does the LMH0031VS/NOPB support?

The LMH0031VS/NOPB supports SMPTE 259M (270/360 Mbps SD-SDI), SMPTE 344M (540 Mbps), and SMPTE 292M (1.483/1.485 Gbps HD-SDI) serial data rates. It auto-detects and configures for corresponding parallel formats including SMPTE 125M, 267M, 274M, 295M, and 296M rasters. The LMH0031VS/NOPB does not support SMPTE ST 2081 (12G-SDI) or ST 2082 (6G-SDI).

How is the video FIFO depth configured on the LMH0031VS/NOPB?

The LMH0031VS/NOPB video FIFO depth is set via the VIDEO FIFO Depth[2:0] bits in the ANC 0 control register, allowing adjustment from 0 to 4 parallel clock periods of delay. This setting controls output timing alignment relative to EAV/SAV sync indicators and is accessible through the AD[9:0] ancillary/control bus or IO[7:0] multi-function port. The LMH0031VS/NOPB defaults to 0-depth after reset.

Does the LMH0031VS/NOPB include built-in test capabilities?

Yes, the LMH0031VS/NOPB integrates a comprehensive Built-In Self-Test (BIST) system and video Test Pattern Generator (TPG) supporting SD and HD colour bars, reference black, PLL/EQ pathologicals, and 75% saturation patterns. These functions are activated via the IO[7:0] port or control registers and output directly on the DV[19:0] bus. The LMH0031VS/NOPB requires no external test equipment for basic functional validation.

What power supply requirements does the LMH0031VS/NOPB have?

The LMH0031VS/NOPB requires two independent supplies: +2.5 V (±5%) for digital logic and PLL circuits (VDDD/VDDPLL), and +3.3 V (±4.5%) for I/O interfaces (VDDIO/VDDSI). Typical total power dissipation is 850 mW. The LMH0031VS/NOPB specifies separate thermal resistance values (θJA = 40.1°C/W at 0 LFM) and requires proper PCB thermal pad connection per TI's PAG0064A package guidelines.

Can the LMH0031VS/NOPB extract ancillary data from SDI streams?

Yes, the LMH0031VS/NOPB includes a dedicated 259-word ancillary data FIFO compliant with SMPTE 291M, capable of extracting audio, timecode, and metadata packets from horizontal and vertical blanking intervals. Extraction is controlled by ANC Mask and ANC ID bits in configuration registers, and output occurs on the AD[9:0] bus. The LMH0031VS/NOPB supports ancillary data in chroma channel only for HD operation per SMPTE 292M.