MAX4397DACTM+

Audio Special Purpose Overview

The MAX4397DACTM+ is a dual SCART audio/video switch matrix designed for routing signals between an MPEG encoder and two external SCART connectors under I2C control. It supports standard 5V and 12V power supplies, operating within a voltage range of 4.75V to 5.25V for video/audio rails and 11.4V to 12.6V for the 12V rail. The device features AC-coupled video inputs with internal clamping and biasing, DC-coupled video outputs, and programmable gain control for RGB component video signals from +5dB to +7dB. Audio channels include clickless switching, volume control from -56dB to +6dB, and stereo-to-mono conversion capabilities.

Audio Special Purpose Feature Summary

• Dual SCART connector support with bidirectional Red/Chroma I/O and internal Y/C mixer for composite video generation
• I2C-programmable RGB gain (+5dB to +7dB) and audio volume control (-56dB to +6dB) with clickless switching
• Internal video reconstruction low-pass filters providing -40dB attenuation at 27MHz and passband ripple between -1dB and +1dB
• Supports slow-switching and fast-switching signals for aspect ratio selection and on-screen display insertion

Audio Special Purpose Applications

• Satellite Set-Top Boxes
• Cable Set-Top Boxes
• Televisions
• VCRs
• DVD Players

Audio Special Purpose Procurement Notes

Verify the specific suffix 'DA' indicates differential audio encoder inputs versus 'SA' single-ended inputs when sourcing replacements. Confirm package integrity for the 48-pin Thin QFN (7mm x 7mm) with exposed paddle. Ensure supply voltages match the specified ranges: VVID/VAUD at 5V nominal and V12 at 12V nominal for proper operation.

Audio Special Purpose Selection Notes

Select the MAX4397DA variant if the design requires differential DC-coupled audio encoder inputs; choose MAX4397SA for single-ended AC-coupled encoder inputs. Both variants share identical video switching capabilities and pinouts except for the encoder audio input configuration. Ensure the application supports the required I2C interface for programming gain and source selection.

Audio Special Purpose Part Context

The MAX4397DACTM+ belongs to the MAX4397 family of audio/video switches specifically engineered for dual SCART applications. It meets EN50049-1, IEC 933-1, Canal+, and BSkyB standards. The device integrates video buffers, audio drivers, and digital control logic into a compact 48-pin TQFN package, suitable for space-constrained consumer electronics.

Audio Special Purpose Replacement Considerations

The MAX4397SACTM+ is a functional substitute with single-ended audio encoder inputs instead of differential. Verify that the system design accommodates the change from differential to single-ended audio input if replacing DA with SA variants.