TW9990AT-NA1-GRT

Overview

The TW9990AT-NA1-GRT is a low-power NTSC/PAL/SECAM video decoder designed for automotive applications. It supports single-ended and differential composite video (CVBS) as well as S-Video inputs. The device converts base-band analog signals into digital 8-bit 4:2:2 YCbCr output formatted to the ITU-R 656 standard with embedded sync. Key specifications include a 1.8V supply for analog and digital cores, 3.3V for I/O, and operation with a single 27MHz crystal. Typical power consumption is 110mW for composite input applications. It features an adaptive 4H comb filter for Y/C separation and includes Vertical Blanking Interval (VBI) processing circuits.

Feature Summary

• Supports differential CVBS inputs alongside single-ended composite video and S-Video formats.
• Integrates an adaptive 4H comb filter to reduce cross-color and cross-luminance artifacts.
• Includes dedicated circuits for detecting and processing Vertical Blanking Interval (VBI) data.
• Utilizes a 2-wire serial host interface for simplified system integration and control.

Applications

• Automotive rear-view camera systems
• Vehicle infotainment displays
• In-car monitoring solutions

Procurement Notes

Verify the specific suffix 'GRT' against official Renesas documentation to confirm tape-and-reel packaging and AEC-Q100 automotive qualification status. Ensure the selected variant matches the required board layout constraints for the 32-VFQFN package. Cross-reference the part number with current manufacturer lifecycle notices to confirm availability for new designs.

Selection Notes

Select this component when differential CVBS input noise immunity is required in automotive environments. The TW9990 series is suitable for designs needing integrated VBI processing and line-locked BT.656 output without external synchronization circuitry. Consider the 110mW typical power consumption for thermal management in enclosed vehicle modules.

Part Context

The TW9990 belongs to Renesas' family of low-power video decoders targeting automotive markets. It serves as a bridge between analog video sources and digital display processors. The device simplifies design by integrating source selection, variable gain amplification, and multi-standard color decoding into a single chip.

Replacement Considerations

Check for direct pin-compatible upgrades within the TW999x series. Verify if alternative decoders support the same differential input requirements and BT.656 output format without requiring schematic modifications.