LMH0318RTWT

Video Processing Overview

The LMH0318RTWT is a multi-rate serial digital video data reclocker with an integrated cable driver, designed for HD/SD SDI applications. It supports data rates from 270 Mbps to 2.97 Gbps, including DVB-ASI and MADI standards. The device features a reference-free clock and data recovery circuit that eliminates accumulated jitter without external components. It includes a programmable equalizer to compensate for PCB loss and an integrated 2-to-1 multiplexer for source selection. Outputs are available in 75 Ω and 50 Ω configurations, supporting ST 424, 344, 292, and 259 standards.

Video Processing Feature Summary

• Reference-free clock and data recovery circuit automatically locks to input data rates without requiring an external reference clock or loop filter components.
• Integrated 2-to-1 multiplexer allows selection between two video sources, while the programmable equalizer compensates for printed circuit board signal loss.
• Non-disruptive on-chip eye monitor enables real-time measurement of serial data to simplify system startup and field tuning.
• Automatic power-down functionality activates upon loss of input signal, reducing overall system power consumption.

Video Processing Applications

• Serial Digital Video Data Reclocking
• HD/SD SDI Signal Distribution
• DVB-ASI Signal Processing
• MADI System Integration

Video Processing Procurement Notes

Verify the specific suffix RTWT against the manufacturer's official documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with required voltage levels and interface protocols before integration. Cross-reference the part number with current datasheets to confirm active status and any potential obsolescence notices. Confirm pinout alignment if replacing existing designs.

Video Processing Selection Notes

Select this component when designing systems requiring jitter reduction for serial video signals up to 3 Gbps without external clock references. It is suitable for applications needing dual-source switching and adjustable equalization for PCB trace losses. Consider its low power consumption and automatic shutdown features for energy-efficient designs. Verify output impedance requirements match the 75 Ω or 50 Ω options provided.

Video Processing Part Context

This device belongs to Texas Instruments' family of high-speed serial video reclockers. It shares functional similarities with other models in the series but is specifically optimized for HD/SD SDI rates. Its design simplifies board layout by integrating drivers and equalizers typically found as separate components. It serves as a critical node in professional video distribution networks requiring signal integrity maintenance.

Video Processing Replacement Considerations

The LMH1218 is documented as pin-compatible with the LMH0318. Verify electrical specifications and supported data rates when substituting, as the LMH1218 operates at higher speeds. Ensure mechanical fitment and thermal characteristics remain within acceptable limits for the target application environment.