AD8191AASTZ-RL

Overview

The AD8191AASTZ-RL is a 4:1 HDMI/DVI switch with equalization, manufactured by Analog Devices Inc. It supports data rates up to 1.65 Gbps and pixel clocks from 25 MHz to 165 MHz across four TMDS channels per link. The device features input cable equalization for long cables (up to 20 meters at 1080p) and pre-emphasized outputs. It operates on a single 3.3 V supply for high-speed channels and a flexible 3.3 V to 5 V supply for auxiliary functions. Packaged in a 100-lead LQFP, it includes serial (I2C) and parallel control interfaces.

Feature Summary

• Integrated input cable equalizer compensates for signal loss over long HDMI cables.
• Pre-emphasized outputs enhance signal integrity for downstream transmission lines.
• Auxiliary switch routes DDC bus and two additional signals for HDCP compliance.
• Supports both serial I2C and parallel control interfaces for configuration.

Applications

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

Procurement Notes

Verify the specific suffix 'ASTZ-RL' against the manufacturer's official ordering guide to confirm reel packaging and tape specifications. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the pinout with the 100-lead LQFP datasheet diagram to validate PCB footprint compatibility before procurement.

Selection Notes

Select this component for systems requiring switching between four HDMI or DVI sources to a single display output. It is suitable for applications needing signal restoration over extended cable runs due to its built-in equalization. Consider the available control interfaces when designing the system logic. Verify that the power supply rails match the specified 3.3 V and 5 V requirements for optimal performance.

Part Context

The AD8191A belongs to Analog Devices' HDMI/DVI switch family, designed for high-definition video routing. It is pin-to-pin compatible with the AD8197A, facilitating design upgrades or replacements within existing hardware architectures. The device addresses the need for robust signal handling in consumer electronics and professional A/V equipment.

Replacement Considerations

The AD8197A is a pin-to-pin compatible alternative. Verify functional equivalence regarding equalization settings and control interface requirements before substitution.

FAQ

What is the maximum data rate supported by the AD8191A?

The AD8191A supports data rates up to 1.65 Gbps per channel, enabling 1080p HDMI formats and UXGA DVI resolutions.

How does the device handle long cable runs?

It features an input cable equalizer that can compensate for more than 20 meters of 24 AWG cable at 1080p resolution.

Can the AD8191A be controlled via parallel interface?

Yes, it supports both serial (I2C slave) and parallel control interfaces. However, using the serial interface disables the parallel interface until a reset occurs.