MAX4079CWG+

Specialized ICS Overview

The MAX4079CWG+ is a specialized integrated circuit designed as a complete audio/video backend solution. It filters and buffers video signals (NTSC/PAL/DVB) and stereo audio from MPEG decoders in cable/satellite receivers, VCRs, DVD players, or TVs. The device features luma-chroma (Y-C) and composite (CVBS) video inputs with one Y-C and two CVBS outputs. Video reconstruction filters have a 6MHz cutoff frequency and provide 50dB attenuation at 27MHz. Audio amplifiers offer fixed gains of +6dB for stereo channels and +3dB for the mono output. The component operates on a single +5V supply for video and a +9V to +12V supply for audio.

Specialized ICS Feature Summary

• Integrated 6MHz lowpass video reconstruction filters with flat group delay for standard-definition video.
• Video gain fixed at +6dB to drive a 75 Ω back-terminated load (150 Ω) to unity gain.
• Audio amplifiers feature differential inputs, +6dB fixed gain, and deliver 2.6V RMS output.
• On-chip mixer provides a mono audio output with +3dB gain derived from left and right channels.

Specialized ICS Applications

• Satellite Receivers
• Cable Receivers
• Home Theater Systems
• DVD Players
• Televisions

Specialized ICS Procurement Notes

Verify the package type against the datasheet, which specifies a 24-pin TSSOP. Ensure the local source documentation accurately reflects this package variant rather than generic descriptions. Confirm that the operating temperature range matches the commercial specification of 0°C to +70°C. Cross-reference the pin configuration and electrical characteristics with the official Maxim Integrated datasheet to ensure compatibility with the intended design.

Specialized ICS Selection Notes

Select the MAX4079CWG+ when a combined video filtering and audio amplification solution is required for standard-definition video systems. The device supports NTSC, PAL, and DVB formats. Consider the dual-supply requirement (+5V for video, +9V to +12V for audio) during power budgeting. Verify that the fixed +6dB video gain and +6dB/+3dB audio gains align with the system's signal chain requirements without needing external amplification stages.

Specialized ICS Part Context

The MAX4079 is part of Maxim Integrated's portfolio of complete audio/video backend solutions. It integrates multiple functions typically requiring separate components, including DC restore/biasing, amplification, and reconstruction filtering. This integration reduces board space and simplifies the design of consumer electronics such as set-top boxes and home theater systems by handling both video and audio signal conditioning in a single package.

Specialized ICS Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should consult the manufacturer's website or authorized distributors for current alternative product listings if the MAX4079CWG+ is unavailable.

Specialized ICS FAQ

What is the cutoff frequency of the video reconstruction filters?

The video reconstruction filters have a cutoff frequency of 6MHz.

How many video input types does the MAX4079 support?

The MAX4079 supports luma-chroma (Y-C) and composite (CVBS) video inputs.

What is the typical gain for the stereo audio channels?

The stereo audio channels have a fixed gain of +6dB.