TDA9950TT/C3,518

Specialized Overview

The TDA9950TT/C3,518 is a single-chip CEC/I2C-bus translator designed for HDMI control applications. It interfaces the Consumer Electronics Control protocol with standard I2C buses using an internal processor and embedded software. The device supports 3.0 V to 3.6 V supply voltage and operates within a 0 °C to +70 °C temperature range. It features 5 V tolerant I/O pins, automatic idle mode for power reduction, and comprehensive arbitration handling. Communication occurs via I2C at 100 kbit/s or 400 kbit/s, supporting messages up to 16 bytes.

Specialized Feature Summary

• Translates between CEC protocol timings and standard I2C-bus communication
• Includes an internal processor with embedded software for interface control
• Supports multiple CEC logical addresses and configurable retry counts
• Features automatic idle mode to minimize power consumption during inactivity

Specialized Applications

• Devices utilizing HDMI connectors
• Projectors, plasma, LCD TVs, and rear-projection TVs
• Home-theater amplifiers and DVD recorders

Specialized Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and tape/reel specifications. Confirm availability status as discontinuation may affect long-term supply. Ensure host processor compatibility with the required I2C addressing and interrupt handling protocols defined in the datasheet.

Specialized Selection Notes

Select this component when a dedicated hardware solution for CEC-to-I2C translation is required without complex external logic. Consider the 5 V tolerance of I/O pins if interfacing with higher voltage systems. Verify that the host system can support the necessary register configuration and interrupt polling mechanisms described in the functional description.

Specialized Part Context

This part belongs to the TDA9950 family of CEC/I2C-bus translators manufactured by NXP Semiconductors. It serves as a bridge between HDMI control lines and host processors lacking native CEC support. The TT variant indicates a TSSOP20 plastic thin shrink small outline package.

Specialized Replacement Considerations

NXP has confirmed that the TDA9950 is no longer manufactured and there is no direct replacement in their current portfolio for CEC/I2C-bus translation functionality.