TDA7338D013TR

Encoders, Decoders, Converters Overview

The TDA7338D013TR is a monolithic stereo decoder for FM car radio applications, utilizing BICMOS technology with switched-capacitor circuits. It operates at a typical supply voltage of 9V (range 7.5–10.2 V) with a supply current of 5–15 mA. The device features an integrated 19 kHz SC notch filter and a PLL running at 456 kHz using a Murata CSB456F11 resonator. Electrical characteristics include a channel separation of 30–45 dB, total harmonic distortion of 0.02–0.3%, and signal-to-noise ratio of 91 dB. It supports noise blanking with programmable thresholds and includes high-cut control and stereo blend functions via external voltage inputs.

Encoders, Decoders, Converters Feature Summary

• Integrated switched-capacitor 19 kHz notch filter and PLL filter for pilot cancellation and detection without multipliers.
• Automatic mono/stereo switching based on pilot threshold voltage with adjustable hysteresis.
• Noise blanker with automatic threshold control and programmable suppression pulse duration to cancel ignition spikes.
• High-cut control and stereo blend capabilities managed through external voltage levels referenced to VR.

Encoders, Decoders, Converters Applications

• FM car radio stereo decoding
• Automotive audio systems requiring noise blanking
• Traffic radio reception with specific subcarrier suppression

Encoders, Decoders, Converters Procurement Notes

Verify component status as the datasheet identifies this part as obsolete. Confirm availability through secondary markets or alternative suppliers if new production units are required. Ensure the SO20 tape and reel packaging matches assembly line specifications. Cross-reference pinouts and electrical parameters against current design requirements before integration.

Encoders, Decoders, Converters Selection Notes

Select this component for legacy automotive FM receiver designs requiring integrated pilot detection and noise blanking. Verify compatibility with the 456 kHz ceramic resonator requirement for the VCO. Ensure external components for deemphasis time constants and noise blanker thresholds align with the specified application circuit values. Check that the SO20 package fits the PCB layout constraints.

Encoders, Decoders, Converters Part Context

The TDA7338D013TR is the tape and reel version of the TDA7338D stereo decoder in an SO20 package. It belongs to STMicroelectronics' range of FM demodulation and decoding integrated circuits designed for automotive environments. The '013TR' suffix indicates the specific packaging format for automated surface-mount assembly.

Encoders, Decoders, Converters Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the product is marked obsolete, consult STMicroelectronics for current equivalent series or compatible third-party alternatives that meet the same SO20 footprint and electrical specifications.

Encoders, Decoders, Converters FAQ

How is the noise blanker trigger threshold adjusted?

The trigger threshold can be adjusted by connecting Pin 1 (PROG) to GND for a low threshold, leaving it open for a high threshold, or connecting it to VDD to disable field strength controlled adjustment.

What external component is required for the PLL oscillator?

A ceramic resonator running at 456 kHz, such as the Murata CSB456F11, is required as the only external component for the PLL oscillator.

How is the device forced into mono mode?

To force the decoder into mono mode, Pin 19 must be clamped to a voltage below 0.8 V.