TDA7332D

Overview

The TDA7332D is an RDS filter realized in switched capacitor technique, designed for high-performance radio data system applications. It features a 4 biquad stage architecture operating with a 4.332MHz clock, or optionally an 8.664MHz crystal. The device provides a center frequency of 57KHz and a bandwidth of 3KHz. Electrical characteristics include a typical gain of 20dB at 57KHz, a supply voltage range of 4.5V to 5.5V, and a typical supply current of 9mA. It incorporates input antialiasing and output smoothing filters, along with a high-performance limiter.

Feature Summary

• Switched capacitor architecture utilizing a 4 biquad stage design
• Integrated high-performance limiter circuitry
• Built-in input antialiasing and output smoothing filters
• Configurable oscillator frequency via external crystal selection

Applications

• Radio Data System (RDS) filtering
• Automotive radio receivers
• Broadcast signal processing

Procurement Notes

Verify component status before ordering as the TDA7332D may be classified as obsolete by the manufacturer. Confirm availability through authorized distributors and check for alternative replacement components if long-term supply continuity is required for production planning.

Selection Notes

Select this component when a dedicated RDS filter with minimal external components is needed. Ensure the application supports a 5V supply and utilizes a 4.332MHz or 8.664MHz clock source. Verify that the SO14 package dimensions fit the target PCB layout constraints.

Part Context

This component belongs to STMicroelectronics' discrete analog filter series, specifically engineered for broadcast reception circuits. It serves as a specialized solution for demodulating RDS signals within FM radio tuners, replacing complex discrete RC networks with a single integrated switched-capacitor device.

Replacement Considerations

Check for direct pin-compatible replacements from STMicroelectronics or other manufacturers offering similar switched-capacitor RDS filters. Evaluate alternative digital DSP solutions if legacy silicon is unavailable.