TDA1591T/V3,112

Encoders, Decoders, Converters Overview

The TDA1591T/V3,112 is a monolithic bipolar integrated circuit serving as a PLL stereo decoder and noise blanker for FM car radio applications. It operates within a supply voltage range of 7.5 to 12 V with a typical current consumption of 12 mA. The device provides an RMS audio output signal of 900 mV, maintaining a total harmonic distortion of 0.1% typical and 0.3% maximum. Key performance metrics include a signal-to-noise ratio of 76 dB and channel separation of 40 dB. It features an adjustment-free voltage-controlled PLL oscillator designed for a 456 kHz ceramic resonator.

Encoders, Decoders, Converters Feature Summary

• Adjustment-free voltage controlled PLL oscillator compatible with 456 kHz ceramic resonators
• Pilot signal dependent mono/stereo switching with analog control for smooth transition
• Integrated adjacent channel noise suppression at 114 kHz and pilot cancellation
• Analog control of de-emphasis time constants via High Cut Control (HCC) input

Encoders, Decoders, Converters Applications

• FM car radio stereo decoding
• Noise blanking in FM demodulator outputs
• Source selector for AM/FM/cassette switching systems

Encoders, Decoders, Converters Procurement Notes

Verify the component authenticity by checking the manufacturer marking against Philips Semiconductors specifications. Confirm the package type matches the SO20 (SOT163-1) outline dimensions provided in the datasheet. Ensure the ordering suffix corresponds to the specified plastic small outline package variant. Cross-reference the date code and lot number with official distribution records to confirm provenance.

Encoders, Decoders, Converters Selection Notes

Select this component when a complete PLL stereo decoder solution with integrated noise blanking is required for automotive FM receivers. Ensure the design accommodates the 7.5 V to 12 V supply range and utilizes a 456 kHz ceramic resonator for the oscillator section. Verify that the application circuit supports the necessary external feedback resistors for gain adjustment and de-emphasis capacitor selection for regional standards.

Encoders, Decoders, Converters Part Context

This part belongs to the TDA1591 family of integrated circuits manufactured by Philips Semiconductors, now NXP USA Inc. The 'T' designation indicates the SO20 surface-mount package variant, while '/V3,112' represents specific manufacturing or packaging codes defined by the supplier. It supersedes earlier data sheets from March 1992, reflecting final product specifications released in September 1996.

Encoders, Decoders, Converters Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Direct replacements should be sought through official NXP channels or by verifying pin-compatible alternatives with identical PLL stereo decoder functionality and SO20 packaging constraints.