LMH1251MTX

Analog Switches - Special Purpose Overview

The LMH1251MTX is a video processing integrated circuit manufactured by National Semiconductor, now part of Texas Instruments. It functions as a YPbPr to RGBHV converter and a 2:1 video switch. The device supports PC video display resolutions up to UXGA (1600 x 1200 @ 75 Hz). The RGB path features a bandwidth of 400 MHz with a gain of approximately 0 dB and an output swing of 700 mVPP. The YPbPr path operates with a bandwidth of 70 MHz, also providing 700 mVPP output. This component is designed for high-performance analog video signal conversion and switching applications.

Analog Switches - Special Purpose Feature Summary

• Integrates YPbPr to RGBHV color space conversion capabilities
• Includes a 2:1 video switch for signal routing flexibility
• Supports high-resolution displays up to UXGA standards

Analog Switches - Special Purpose Applications

• PC video display systems requiring resolution support up to UXGA
• Video signal routing equipment utilizing YPbPr inputs
• Analog video processing boards needing RGBHV output generation

Analog Switches - Special Purpose Procurement Notes

Verify the manufacturer status carefully, as National Semiconductor was acquired by Texas Instruments. Confirm the specific suffix 'X' indicates tape and reel packaging if required for assembly. Check current availability as legacy components may be discontinued or replaced by newer series. Ensure compatibility with existing PCB footprints before ordering.

Analog Switches - Special Purpose Selection Notes

Select this component when both YPbPr decoding and RGBHV conversion are required in a single package. Consider the 400 MHz RGB bandwidth for high-frequency signal integrity. Evaluate the 2:1 switch feature to simplify board layout by reducing external multiplexing components. Verify power supply requirements against system constraints.

Analog Switches - Special Purpose Part Context

The LMH1251 belongs to the family of video processing ICs from National Semiconductor. It is often associated with evaluation boards such as the LMH1251EVAL/NOPB. Related parts include the LMH1251MT/NOPB. The device addresses the need for compact video signal conditioning in professional and consumer electronics.

Analog Switches - Special Purpose Replacement Considerations

Consult Texas Instruments documentation for direct replacements or pin-compatible alternatives. The LMH1251MT/NOPB is a closely related variant. Verify functional equivalence regarding bandwidth and switching capabilities before substitution.