UDA1355H/N2,518

Overview

The UDA1355H is a stereo audio codec with an SPDIF interface, manufactured by NXP USA Inc. It integrates an IEC 60958 decoder and encoder alongside stereo digital-to-analog converters (DAC) and analog-to-digital converters (ADC). The device operates on a 2.7 to 3.6 V power supply and utilizes a 12.288 MHz crystal oscillator for clock generation. It supports sampling frequencies from 16 to 100 kHz, including standard rates like 32, 44.1, and 48 kHz. The DAC offers a signal-to-noise ratio of up to 98 dB at 48 kHz, while the ADC achieves up to 97 dB. Control is managed via static pins or microcontroller interfaces such as L3-bus and I2C-bus.

Feature Summary

• Integrated IEC 60958 decoder supporting four selectable SPDIF inputs with level I, II, and III timing compatibility.
• Built-in IEC 60958 encoder capable of generating full-swing digital output signals with CMOS levels.
• Dual independent clock systems utilizing a 12.288 MHz crystal oscillator and a PLL for jitter removal.
• Comprehensive digital sound processing including programmable gain amplifiers, volume control, and soft mute capabilities.

Applications

• Audio systems requiring integrated SPDIF decoding and encoding functions.
• Stereo audio playback devices utilizing bitstream conversion techniques.
• Digital audio recording equipment featuring high-resolution analog-to-digital conversion.
• Embedded audio solutions controlled via static pins or microcontroller interfaces.

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm package integrity and pin alignment prior to installation. Review material declarations for compliance with environmental standards. Ensure handling procedures adhere to electrostatic discharge precautions during storage and assembly processes.

Selection Notes

Evaluate power supply requirements against the specified 2.7 to 3.6 V range. Assess control interface compatibility with existing microcontroller architectures. Consider thermal characteristics and ambient temperature limits for the intended operating environment. Verify crystal oscillator specifications match the required 12.288 MHz frequency for proper clock generation.

Part Context

This component belongs to the UDA1355H series of stereo audio codecs. It is designed for applications requiring high-fidelity audio processing with integrated digital interfaces. The device replaces older discrete solutions by combining decoding, encoding, and conversion functions into a single chip.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation. Consult manufacturer resources for potential obsolescence management strategies or alternative product lines.

FAQ

What control interfaces does the UDA1355H support?

The UDA1355H can be controlled via static pins or through microcontroller interfaces, specifically the L3-bus and I2C-bus.

How many SPDIF input channels can the decoder select?

The on-chip IEC 60958 decoder allows selection of one out of four SPDIF input channels.

What is the function of the LOCK pin?

The LOCK pin provides a lock indication signal when the IEC 60958 decoder and the clock regeneration mechanism are successfully locked onto the incoming signal.