STA120DJ

Audio Special Purpose Overview

The STA120DJ is a monolithic CMOS digital audio interface receiver designed for AES/EBU, IEC 958, S/PDIF, and EIAJ CP-340/1201 standards. Operating on a 3.3V supply, it integrates an RS422 line receiver and a Phase-Locked Loop (PLL) to recover low-jitter clocks and synchronize audio data. The device demultiplexes channel status, user bits, and validity information directly to dedicated serial output pins. It supports sample frequencies from 25 kHz to 96 kHz and provides a 256xFS master clock output with jitter attenuation characteristics starting at approximately 25 kHz.

Audio Special Purpose Feature Summary

• Supports AES/EBU, IEC 958, S/PDIF, and EIAJ CP-340/1201 professional and consumer formats
• Integrates RS422 differential or single-ended line receiver with Schmitt trigger hysteresis
• On-chip PLL recovers clock and synchronizes data with jitter attenuation of 50dB by 1MHz
• Outputs 256xFS master clock (MCK) with typical jitter of 300 ps RMS

Audio Special Purpose Applications

• Digital audio receivers in professional broadcast equipment
• Consumer audio interfaces requiring S/PDIF decoding
• Systems needing direct extraction of channel status and user bits without microprocessor intervention

Audio Special Purpose Procurement Notes

Verify the 'D' suffix indicates the SO28 package variant. Confirm that the component meets RoHS compliance requirements if applicable to the specific manufacturing lot. Check for obsolete status indicators as datasheets may reference end-of-life notifications for legacy audio components.

Audio Special Purpose Selection Notes

Select this component when a standalone solution for digital audio interface decoding is required without external DSP processing. Ensure the application can accommodate the external loop filter components (330 Ohm resistor and capacitors) connected to the FILT pin for proper PLL operation and jitter performance.

Audio Special Purpose Part Context

The STA120 is part of STMicroelectronics' digital audio interface receiver family. It serves as a bridge between digital audio transmission lines and downstream audio processors or DACs by handling the physical layer reception and protocol decoding tasks autonomously.

Audio Special Purpose Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.