TW9900-NA1-GR

Overview

The TW9900-NA1-GR is a low-power NTSC/PAL/SECAM video decoder designed for portable applications. It consumes less than 100mW in typical composite input scenarios and features a power-down mode for further reduction. The device operates on a single 27MHz crystal to decode all analog video standards, utilizing 1.8V for analog/digital supplies and 3.3V for I/O. It converts baseband analog CVBS or S-video signals into digital 8-bit 4:2:2 YCbCr output via BT.656 interface. Key internal blocks include an analog front-end with variable gain amplifier, adaptive 4H comb filter for Y/C separation, multi-standard color decoder, and synchronization circuitry. The component is housed in a 32-pin QFN package (4.0 x 4.0 x 0.90 mm) with a 0.4 mm pitch, rated for -40°C to +85°C operation.

Feature Summary

• Integrates adaptive 4H comb filter for high-quality Y/C separation to reduce cross-color and cross-luminance artifacts.
• Supports multiple analog video standards including NTSC M, PAL BGHI/M/N, and SECAM using a single 27MHz crystal.
• Features advanced synchronization processing capable of producing stable pictures from non-standard signals.

Applications

• Portable video devices requiring low power consumption
• Systems decoding baseband analog CVBS or S-video inputs
• Applications requiring digital 8-bit 4:2:2 YCbCr output

Procurement Notes

Verify the specific suffix GR against the official Renesas datasheet to confirm it denotes the tape-and-reel packaging variant. Ensure the order matches the required moisture sensitivity level and lead-free specifications. Confirm availability through authorized distributors as stock levels fluctuate. Cross-reference the part number with the latest revision history to ensure compatibility with current manufacturing processes.

Selection Notes

Select this component when a low-power solution for NTSC/PAL/SECAM decoding is required for portable systems. It is suitable for designs needing direct conversion from analog CVBS/S-video to digital YCbCr without external DACs. Consider the 32-pin QFN package constraints and thermal requirements. Verify that the 1.8V core voltage and 3.3V I/O voltage align with the system's power rails.

Part Context

The TW9900 series represents Renesas' low-power video decoder line for portable electronics. The TW9900 specifically targets applications where power efficiency is critical, such as handheld devices. It integrates full analog-to-digital conversion and standard decoding capabilities into a single chip, simplifying board design compared to discrete solutions.

Replacement Considerations

Check for updated Renesas part numbers with revised suffixes indicating packaging changes. Verify functional compatibility if substituting with other TW99xx series variants. Ensure pinout and electrical characteristics match before replacing.

FAQ

What supply voltages are required for the TW9900?

The device requires 1.8V for both analog and digital supply voltages, and 3.3V for I/O power.

Does the TW9900 include a video DAC?

No, the TW9900 outputs digital 8-bit 4:2:2 YCbCr data and does not contain an integrated video DAC.

How is Y/C separation performed in this decoder?

It uses a high-quality adaptive 4H comb filter to separate luminance and chrominance, reducing cross-color and cross-luminance interference.