TDA19998HL/C1,518

Video Processing Overview

The TDA19998HL is a Smart HDMI 1.4a (4:1) switch with an auto-adaptive equalizer, manufactured by NXP Semiconductors. It features four independent DVI/HDMI inputs and one output, supporting data rates up to 2.25 gigasamples per second. The device complies with HDMI 1.4a, DVI 1.0, EIA/CEA-861D, and HDCP 1.4 standards. It includes embedded EDID memory for each input, I2C-bus control, and F3 technology for fast switching while maintaining encrypted streams. Power supplies include 3.3 V and 1.8 V options.

Video Processing Feature Summary

• Supports four independent DVI/HDMI inputs with dedicated embedded EDID memory for each port.
• Integrates 'F3 technology' enabling zero-delay switching between ports while keeping the HDMI output stream encrypted.
• Features a robust auto-adaptive equalizer that manages signal quality across varying cable lengths without external control.
• Includes activity detection on each input to manage output activation and reduce power consumption when no signal is present.

Video Processing Applications

• 3D-TV systems
• HDTV displays including plasma, rear projection, and LCD TVs
• Projectors
• Home theater setups
• Audio Video Receivers (AVR)

Video Processing Procurement Notes

Verify the specific ordering suffix against current NXP documentation to confirm package type and compliance status. Confirm availability as this component may be subject to last-time-buy notices or obsolescence. Ensure the design supports the required 3.3 V and 1.8 V supply rails and I2C interface compatibility.

Video Processing Selection Notes

Select this component for designs requiring a 4-to-1 HDMI/DVI switching matrix with integrated equalization. It is suitable for applications needing support for Deep Color and 3D video formats up to 1080p60. Consider its pin compatibility with legacy TDA999x series if migrating existing designs. Verify thermal requirements for the LQFP100 package in the target enclosure.

Video Processing Part Context

This part belongs to NXP's Smart HDMI switch family, designed for high-definition multimedia routing. It serves as a successor or alternative to earlier models like the TDA19997, offering enhanced switching capabilities and integrated equalization. The device is intended for consumer electronics and professional AV equipment requiring reliable HDMI signal distribution.

Video Processing Replacement Considerations

The datasheet notes pin compatibility with TDA9996, TDA9995, TDA19997, and TDA19995. Designers migrating from these parts should verify register-level software compatibility via I2C, as functional behavior may differ despite physical pin matching.

Video Processing FAQ

How does the TDA19998HL handle HDCP encryption during switching?

It utilizes 'F3 technology' to detect the HDCP state of the source, allowing seamless switching between HDMI ports while maintaining the encrypted output stream without interruption.

What is the maximum cable length supported by the auto-adaptive equalizer?

The equalizer can manage signals from short cables to long cables up to 20 meters at 2.25 Gbit/s or up to 30 meters at 1.5 Gbit/s using AWG24 cable.

Can the EDID memory be accessed if the main power supplies are off?

Yes, the EDID memory can remain active and accessible via the DDC bus if powered by +5 V from the HDMI source or the AUX_5V pin, even when the device core supplies are down.