MAX7444ESA+

Overview

The MAX7444ESA+ is a triple-channel video reconstruction filter and buffer designed for S-video and CVBS signals. It operates from a single +5V supply and features high-frequency boost to enhance picture sharpness. The device includes lowpass filters and adjustable-gain output buffers capable of driving two standard 150Ω video loads per channel. Key electrical parameters include a typical stopband attenuation of 41dB at 27MHz, a passband response of -0.3dB (typ), and a supply current of 88mA to 110mA. It supports gain settings of 6dB, 9.5dB, and 12dB via the GSET pin. The component is specified over an extended temperature range of -40°C to +85°C and is housed in an 8-pin SO package with an exposed pad.

Feature Summary

• Triple-channel architecture providing separate Y, C, and composite video outputs
• High-frequency boost capability to compensate for signal degradation and improve image sharpness
• Adjustable output gain selectable between 6dB, 9.5dB, and 12dB
• Low blanking level voltage enabling DC-coupled output configurations

Applications

• Set-top boxes and hard-disk recorders
• DVD players and digital VCRs
• Security cameras and digital cameras
• Game consoles and personal video recorders

Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation to confirm package type and environmental compliance. Confirm availability status as distribution channels may vary. Ensure the design accommodates the required +5V single-supply voltage and thermal management for the SO-EP package. Cross-reference the part number with the latest datasheet revision to validate all electrical characteristics before finalizing procurement.

Selection Notes

Select the MAX7444ESA+ when high-frequency boost is required to sharpen video images compared to the flat-response MAX7443. Ensure the application utilizes a single +5V power supply. Verify that the 8-pin SO package with exposed pad fits the PCB layout constraints. Confirm compatibility with NTSC, PAL, and SDTV signal standards. Check if the adjustable gain settings meet the specific drive requirements for the connected video loads.

Part Context

The MAX7444ESA+ belongs to the MAX7443/MAX7444 family of triple-channel video reconstruction filters manufactured by Analog Devices Inc./Maxim Integrated. This series is optimized for reconstructing analog video signals from DAC outputs in consumer electronics. The MAX7444 variant specifically distinguishes itself by offering high-frequency boost, whereas the MAX7443 provides a maximally flat frequency response. Both share identical pinouts and operational characteristics except for the frequency response profile.

Replacement Considerations

The MAX7443ESA+ serves as a direct functional substitute within the same family, differing only in the absence of high-frequency boost.