MAX7449EUD+

Overview

The MAX7449EUD+ is a 3-channel buffered video reconstruction filter designed for RGB component video applications. It operates from a single +5V supply and features a flat passband out to 5MHz with a stopband attenuation of 43dB at 27MHz, making it suitable for NTSC, PAL, and SDTV systems. Each channel includes a lowpass filter and an output buffer with a fixed gain of +6dB, capable of driving two standard 150Ω video loads. The device processes R, G, and B signals independently and provides external sync input for DC restoration. It is specified over the -40°C to +85°C extended temperature range and housed in a 14-pin TSSOP package with an exposed pad.

Feature Summary

• Three-channel integrated filter and buffer architecture optimized for RGB component video signal processing
• Butterworth-type frequency response providing maximally flat passband characteristics for standard definition video formats
• External synchronization capability enabling DC restore loop activation for precise output blanking level control
• Single-supply operation with high-output current drivers supporting dual 150Ω video load termination

Applications

• Set-top boxes and hard-disk recorders (HDRs)
• DVD players and digital VCRs
• Game consoles and desktop video editors

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm exact package type and temperature rating. Confirm RoHS compliance status through the latest datasheet revision or environmental declaration. Check for active production status as legacy components may have limited availability or end-of-life notifications.

Selection Notes

Select this component when designing systems requiring simultaneous reconstruction of three independent analog video channels from digital sources. Ensure the application supports a single +5V power rail and requires a cutoff frequency near 5MHz. Verify that the required drive capability matches the dual 150Ω load specification and that the operating environment falls within the extended industrial temperature range.

Part Context

This part belongs to the MAX7449 family of video reconstruction filters manufactured by Analog Devices Inc./Maxim Integrated. It is specifically engineered for consumer electronics and professional video equipment where high-fidelity analog video output is derived from digital-to-analog conversion stages.

Replacement Considerations

Consult the manufacturer's official cross-reference documentation for verified substitute part numbers. Do not assume functional compatibility with other video filters without verifying pinout, electrical specifications, and package dimensions against the original design requirements.