TDA9881TS/V5,118

Video Processing Overview

The TDA9881TS/V5,118 is an alignment-free multistandard vision and sound IF signal PLL demodulator for negative modulation, including Quasi Split Sound (QSS) or intercarrier FM processing. It operates on a 5 V supply voltage with a typical current of 63 mA. The device features a gain-controlled wideband Vision Intermediate Frequency (VIF) amplifier with a typical control range of 66 dB. It supports vision carrier frequencies of 38.0 MHz, 38.9 MHz, 45.75 MHz, and 58.75 MHz. The video output at pin CVBS provides a peak-to-peak voltage of 2.0 V. Audio performance includes a weighted signal-to-noise ratio of 56 dB and total harmonic distortion of 0.15%.

Video Processing Feature Summary

• Multistandard true synchronous demodulation for negative modulated TV standards with active carrier regeneration.
• Fully integrated VIF Voltage Controlled Oscillator (VCO) that is alignment-free and switchable via logic pins.
• Digital acquisition help circuit to prevent false locking of the Phase-Locked Loop (PLL).
• Precise fully digital Automatic Frequency Control (AFC) detector with integrated digital-to-analog converter.

Video Processing Applications

• Television systems
• Video Tape Recorders (VTR)
• Personal Computer (PC) applications
• Set-Top Box (STB) applications

Video Processing Procurement Notes

Verify the specific package variant, as the TDA9881 is available in SSOP24 and HVQFN32 formats. Confirm the ordering suffix matches the required lead-free and RoHS compliance status. Check the manufacturing status, as some variants may be discontinued. Ensure the source document explicitly lists the TDA9881TS/V5,118 part number before finalizing procurement decisions.

Video Processing Selection Notes

Select this component for designs requiring alignment-free demodulation of PAL and NTSC signals. The device simplifies design by integrating the VIF amplifier, VCO, and sound traps. Consider the logic pin configurations for selecting specific vision and sound carrier frequencies. Evaluate the thermal characteristics if using the HVQFN32 package versus the SSOP24 package for heat dissipation requirements.

Video Processing Part Context

The TDA9881 is a Philips Semiconductors product designed for TV and multimedia applications. It replaces older tuning systems that required manual alignment of intermediate frequency filters. The device integrates multiple functional blocks including the VIF amplifier, tuner AGC, and audio processing stages into a single chip.

Video Processing Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material.

Video Processing FAQ

How is the vision IF frequency selected?

The vision IF frequency is selected via pin VIF0 and pin QSSO with a resistor. Specific combinations select frequencies such as 38.0 MHz, 38.9 MHz, 45.75 MHz, or 58.75 MHz.

What is the function of the digital acquisition help circuit?

The digital acquisition help circuit prevents false locking of the PLLs by providing individual control until the VCO frequency is within the preselected standard-dependent lock-in window.

Can the device operate without an external reference signal?

Yes, the REF pin can operate as a 1-pin crystal oscillator input or accept an external 4 MHz reference signal from a tuning system.