TEA6425

Video Processing Overview

The TEA6425 is a video cellular matrix switcher featuring six video inputs and eight video outputs. It includes two internal selectable YC adders for combining luminance and chroma signals. The device supports I2C bus control for configuring input clamp modes, output gain selection (0.5/6.5dB), and switching states. It offers high impedance switching for each output to enable parallel DC connection of up to four devices. Key electrical characteristics include a 15MHz bandwidth at -3dB, -60dB crosstalk at 5MHz, and operation with a supply voltage of 8V.

Video Processing Feature Summary

• Supports switching between video and chroma signals such as CVBS, SVHS, baseband CVBS, and MAC.
• Features two internal SVHS mixers that add selected Y and C inputs to dedicated outputs.
• Allows individual setting of outputs to a high impedance state for parallel device connection.
• Enables programmable clamp mode on each input for sync bottom or average value clamping.

Video Processing Applications

• Switching between video and chroma signals in multimedia systems
• Parallel connection of multiple matrix switches via high impedance outputs
• Combining luminance and chroma signals using internal SVHS mixers

Video Processing Procurement Notes

Verify the specific package type required, as the TEA6425 is available in DIP20 and SO20L plastic packages. Confirm the ordering code matches the desired package: TEA6425 for DIP20 and TEA6425D for SO20L. Ensure the system design accommodates the 8V supply voltage requirement and I2C bus timing specifications for reliable operation.

Video Processing Selection Notes

Select this component when a 6x8 video matrix configuration is needed with integrated Y/C mixing capabilities. Consider its suitability for applications requiring independent output gain adjustment and high-impedance tri-state outputs for bus isolation. Verify compatibility with the target I2C bus speed and address configuration requirements before integration.

Video Processing Part Context

The TEA6425 belongs to STMicroelectronics' family of video switching and routing solutions designed for consumer electronics and multimedia applications. It provides a compact solution for managing multiple video sources and destinations within a single integrated circuit, simplifying board layout and reducing component count compared to discrete switching approaches.

Video Processing Replacement Considerations

No public confirmed substitute part numbers are documented in the provided datasheet.

Video Processing FAQ

How many devices can be connected in parallel?

Up to four devices can be connected in parallel by utilizing the high impedance state of the outputs and the 4-sub-address capability controlled via Pin 7.

What types of video signals does the TEA6425 support?

The device is intended for switching between video and chroma signals such as CVBS, SVHS, baseband CVBS, and MAC.