Texas Instruments LMH0366SQ/NOPB

Overview

LMH0366SQ/NOPB from Texas Instruments is a 3 Gbps SMPTE ST 424/ST 292/ST 259-C compliant HD/SD SDI reclocker with integrated 64×64 eye monitor, supporting 125 Mbps to 2.97 Gbps serial data rates, 100 mW typical power consumption, and dual LVDS reclocked outputs with programmable de-emphasis up to 40" FR4 - deployed in broadcast video routers and distribution amplifiers.

For engineers reviewing the LMH0366SQ/NOPB datasheet, LMH0366SQ/NOPB pinout, LMH0366SQ/NOPB application, or LMH0366SQ/NOPB equivalent, key selection considerations include SMPTE-compliant jitter suppression, referenceless vs. 27 MHz external reference operation, input FR4 equalization (0–60"), output driver configurability (reclocked data, recovered clock, or bypassed data), and SPI-controlled eye monitoring and power optimization.

Technical Context

The LMH0366SQ/NOPB implements a CDR-based reclocking architecture with adaptive loop bandwidth (220 kHz to 1.7 MHz) and automatic rate detection across six standard video rates. Its input stage features rail-to-rail common-mode support and internal 100Ω termination for direct DC coupling to upstream equalizers like LMH0394.

Two independent LVDS outputs support flexible signal routing: SDO0 delivers reclocked or bypassed data; SDO1 delivers reclocked data, recovered clock (via SCO_EN), or bypassed data - all with programmable swing (400–800 mV_P-P), offset (0.8–1.2 V), and de-emphasis (0–7 dB). Eye monitoring operates only in locked, non-bypass mode.

Key Specifications

Pinout & Package

LMH0366SQ/NOPB uses a 24-pin WQFN package (RTW0024A) with exposed die attach pad (DAP = VEE). Pin functions differ between pin mode (SPI_EN = GND) and SPI mode (SPI_EN = VCC); dual-mode pins include RATE0/RATE1, BYPASS/MOSI, MUTE/SCK, SCO_EN/SS, and VEE/MISO.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMH0366SQ/NOPB, LMH0384SQ/NOPB reduces channel count and feature set for cost-sensitive single-path applications, while GS2971-IBE3 adds cable driving capability and 12G readiness at the expense of higher power and no on-chip eye visualization.

Availability

LMH0366SQ/NOPB is available at Aetrix Electronics and suitable for broadcast video routers, HD/SDI distribution amplifiers, and 3G-SDI switcher input stages requiring stable component supply, long-lifecycle assurance, and SMPTE-compliant jitter performance.

Supply support for LMH0366SQ/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-speed interface solutions for industrial, automotive, and communications markets.

The LMH0366SQ/NOPB belongs to TI's high-speed serial interface product line, engineered specifically for SMPTE-compliant video infrastructure where signal integrity, multi-rate flexibility, and on-chip diagnostics are critical.

FAQ

What video standards does the LMH0366SQ/NOPB support?

The LMH0366SQ/NOPB supports SMPTE ST 424 (3G-SDI), ST 292 (HD-SDI), ST 259-C (SD-SDI), DVB-ASI at 270 Mbps, and MADI at 125 Mbps. It automatically detects and locks to any of these six data rates: 125 Mbps, 270 Mbps, 1.4835 Gbps, 1.485 Gbps, 2.967 Gbps, and 2.97 Gbps - ensuring full interoperability across legacy and modern broadcast systems.

Does the LMH0366SQ/NOPB require an external crystal?

No, the LMH0366SQ/NOPB operates in referenceless mode by default and does not require an external crystal. A 27 MHz external reference (via XTAL_IN/XTAL_OUT) is optional and only needed to distinguish between 1.001× variants (e.g., 2.97 Gbps vs. 2.97/1.001 Gbps). In referenceless mode, LMH0366SQ/NOPB maintains full SMPTE compliance for all standard rates.

How does the eye monitor in the LMH0366SQ/NOPB function?

The LMH0366SQ/NOPB integrates a 64×64 point real-time eye opening monitor that samples the incoming SDI signal during normal locked operation. It provides pixel-level eye diagram data accessible via SPI readback - enabling in-system validation of signal quality without external test gear. The monitor is disabled in bypass mode or when PLL lock is lost.

Can the LMH0366SQ/NOPB output both reclocked data and recovered clock simultaneously?

Yes - the LMH0366SQ/NOPB can output reclocked data on SDO0 and the recovered serial clock on SDO1 simultaneously, provided SCO_EN is asserted and PLL lock is achieved. This configuration is commonly used to feed clock-synchronous downstream devices such as FPGAs or serializer ICs requiring separate data and clock inputs.

What is the maximum FR4 trace length the LMH0366SQ/NOPB can equalize on its input?

The LMH0366SQ/NOPB input equalizer supports up to 60 inches of FR4 trace length, adjustable via SPI register 0x11 bit 1 (EQ_BOOST_60) for optimal compensation beyond 40". This eliminates the need for external equalization in mid-length PCB interconnects between upstream equalizers (e.g., LMH0394) and the LMH0366SQ/NOPB input.