Texas Instruments LMH0376SQE/NOPB

Overview

LMH0376SQE/NOPB from Texas Instruments is a 3 Gbps HD/SD SDI low-power reclocker with integrated 4:1 input multiplexer, eye monitor, and dual LVDS outputs. It retimes SMPTE ST 424/292/259-C-compliant serial video data at 125 Mbps–2.97 Gbps, suppresses accumulated jitter via clock recovery, and supports DVB-ASI and MADI protocols in broadcast routing infrastructure.

For engineers reviewing the LMH0376SQE/NOPB datasheet, LMH0376SQE/NOPB pinout, LMH0376SQE/NOPB application, or LMH0376SQE/NOPB equivalent, key selection criteria include multi-rate SDI reclocking capability, 4-channel FR4-equalized input mux with independent signal detect, 64×64 eye monitor for signal integrity validation, and programmable output de-emphasis up to 40" FR4 trace compensation.

Technical Context

The LMH0376SQE/NOPB implements a PLL-based clock and data recovery (CDR) architecture with adaptive loop bandwidth (350 kHz–3.5 MHz) optimized per data rate. Its CDR locks to incoming serial video streams without external reference in reference-less mode or uses a 27 MHz crystal for enhanced stability.

It integrates four independently equalized SDI inputs (0–60" FR4), each with rail-to-rail common-mode voltage support and programmable signal detection threshold. Two LVDS outputs support reclocked data, recovered clock, or bypassed data with independent amplitude (400–800 mV_P-P), offset (0.8–1.2 V), and de-emphasis (0–7 dB) control via SPI.

Key Specifications

Pinout & Package

LMH0376SQE/NOPB is housed in a 48-pin WQFN package (7 mm × 7 mm, 0.5 mm pitch) with exposed die attach pad (DAP) connected to VEE. The package supports high-speed signal integrity with internally terminated 100 Ω inputs and LVDS outputs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMH0376SQE/NOPB, LMH0356SQE/NOPB offers hardware compatibility at reduced functionality, while GS2971-IBE3 targets higher-bandwidth single-link applications-neither provides the same combination of 4-channel mux, eye monitoring, and multi-standard support.

Availability

LMH0376SQE/NOPB is available at Aetrix Electronics and suitable for broadcast video routers, HD/3G-SDI distribution amplifiers, and multi-format switchers requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for production programs.

Supply support for LMH0376SQE/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 for industrial, automotive, and communications markets.

The LMH0376SQE/NOPB belongs to TI's broadcast video interface product line, engineered specifically for SMPTE-compliant SDI signal regeneration in professional video equipment where jitter tolerance, multi-rate agility, and system-level diagnostics are critical.

FAQ

What data rates does the LMH0376SQE/NOPB support?

The LMH0376SQE/NOPB supports six discrete serial data rates: 125 Mbps (MADI), 270 Mbps (SMPTE ST 259-C/DVB-ASI), 1.4835 Gbps and 1.485 Gbps (SMPTE ST 292), and 2.967 Gbps and 2.97 Gbps (SMPTE ST 424). It automatically detects and locks to any of these rates without external configuration, making LMH0376SQE/NOPB ideal for mixed-format broadcast systems.

How does the integrated eye monitor in the LMH0376SQE/NOPB function?

The LMH0376SQE/NOPB provides a real-time 64 × 64 point eye opening monitor that samples the incoming SDI signal to generate a quantifiable eye diagram. This feature operates only in SPI mode and requires register access to read pixel data; it delivers objective signal integrity metrics without external test equipment, directly supporting field validation of cable health and input signal quality in LMH0376SQE/NOPB-based designs.

Can the LMH0376SQE/NOPB operate without an external crystal?

Yes, the LMH0376SQE/NOPB supports reference-less operation, using its internal oscillator to achieve stable clock recovery across all supported data rates. When an external 27 MHz crystal is not used, the XTAL_IN pin must be grounded. Reference-less mode eliminates BOM cost and layout area, while the optional crystal improves long-term stability-both configurations are fully supported in LMH0376SQE/NOPB production use.

What is the purpose of the BYPASS pin on the LMH0376SQE/NOPB?

The BYPASS pin on the LMH0376SQE/NOPB is an active-high LVCMOS input that forces the device into transparent pass-through mode, disabling reclocking and routing raw input data directly to both SDO0 and SDO1 outputs. In this state, LOCK_DETECT deasserts and the eye monitor is disabled. This allows LMH0376SQE/NOPB to serve as a configurable buffer during system bring-up or fault isolation without altering signal path latency.

Does the LMH0376SQE/NOPB support independent control of its two LVDS outputs?

Yes, the LMH0376SQE/NOPB supports independent configuration of SDO0 and SDO1 outputs via SPI registers-including selectable output type (reclocked data, recovered clock, or bypassed data), differential swing (400–800 mV_P-P), offset voltage (0.8–1.2 V), de-emphasis level (0–7 dB), polarity inversion, and individual power-down. This granular control enables LMH0376SQE/NOPB to drive heterogeneous downstream receivers with differing electrical requirements from a single device.