AD8191ASTZ

Overview

The AD8191ASTZ is a video switch IC designed for HDMI and DVI applications, featuring four inputs and one output. It supports data rates up to 1.65 Gbps per channel with pixel clocks ranging from 25 MHz to 165 MHz. The device includes input cable equalization for long cables and pre-emphasized outputs. It operates on a single 3.3 V supply for high-speed channels and flexible 3.3 V to 5 V supplies for auxiliary channels. The component is housed in a 100-lead LQFP package and functions within an operating temperature range of -40°C to +85°C.

Feature Summary

• Supports switching of four HDMI/DVI links with integrated input equalization and output pre-emphasis.
• Offers flexible channel bundling modes including 4:1, dual 8:1, and single 16:1 configurations.
• Features bidirectional auxiliary channels capable of routing the DDC bus and additional control signals.
• Provides both serial I2C and parallel control interfaces for comprehensive configuration.

Applications

• Multiple input displays
• Projectors
• A/V receivers
• Set-top boxes
• Advanced television (HDTV) sets

Procurement Notes

Verify the specific suffix ASTZ against official Analog Devices documentation to confirm the exact package type and temperature rating. Ensure that the required supply voltages match the datasheet specifications for AVCC and AMUXVCC. Confirm compatibility with the intended control interface, either serial or parallel, before finalizing procurement.

Selection Notes

Select this component when designing systems requiring the switching of multiple HDMI or DVI sources with signal integrity compensation. Consider its ability to handle long cable runs via equalization and its support for HDCP standards. Evaluate the available switching modes to determine if the quad, dual, or single configuration best fits the system architecture.

Part Context

The AD8191 belongs to the Analog Devices HDMI/DVI switch family, which provides solutions for high-resolution video networks. It is designed to meet HDMI receiver and DVI standards, supporting HDCP compliance. The device integrates TMDS channel switching with auxiliary signal management, serving as a central component in complex video distribution architectures.

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.

FAQ

What switching modes does the AD8191 support?

The AD8191 supports three high-speed switching modes: quad mode (4:1 link switch), dual mode (two 8:1 switches), and single mode (one 16:1 switch).

How is the AD8191 controlled?

The device can be controlled via a serial I2C slave interface or a parallel control interface. Serial programming values override parallel settings until a reset occurs.

Can the AD8191 handle long HDMI cables?

Yes, the device features input cable equalization that allows operation with long HDMI cables, such as over 20 meters of 24 AWG cable at 1080p resolution.