LC823430TA-2H

Audio Special Purpose Overview

The LC823430TA is an audio processing system LSI designed for MP3 record and playback devices. It integrates a 32-bit LPDSP32, analog blocks including audio ADC/DAC, speaker/headphone amplifiers, and an LCD segment driver. The device supports MP3 compression (MPEG1/2/2.5 Layer3) with sampling frequencies from 8kHz to 48kHz and bitrates up to 320kbps. Key specifications include a core supply voltage of 1.15V to 1.65V, a maximum DSP operation frequency of 42MHz at 1.3V, and an operating temperature range of -20°C to +75°C. It features USB 2.0 Device interface, SD card interfaces, and I2C control.

Audio Special Purpose Feature Summary

• Integrates 32-bit LPDSP32 with 264.5KB ROM and 416KB SRAM, supporting isolated power control for specific memory areas.
• Includes built-in AB class speaker amplifier (max 300mW @3.0V, 8Ω) and headphone amplifiers (max 5mW @3.0V, 16Ω).
• Supports MP3 decoding/encoding with flexible PCM audio interfaces, sample rate converters (0.5x to 64x), and digital microphone interfaces.
• Features USB 2.0 High-Speed Device interface with built-in PHY, dual SD card interfaces (eSD/eMMC compatible), and LCD driver for 18SEG x 8COM displays.

Audio Special Purpose Applications

• IC Recorders
• Audio Players
• Radio Recorders
• Home Audio Systems (Mini Component)

Audio Special Purpose Procurement Notes

Verify the ordering suffix '-2H' indicates a Pb-Free and Halogen Free package configuration in the TQFP128L (14x14) format. Confirm that the application design accounts for the separate power domains: VDD1 (1.15V-1.65V) for the digital core and VDD2 (2.7V-3.3V) for I/O and analog sections. Ensure firmware loading methods (Internal ROM Boot via SD or Serial Flash) align with the BMODE pin settings during procurement validation.

Audio Special Purpose Selection Notes

Select this component for applications requiring integrated audio processing with minimal external components due to built-in amplifiers and codecs. Consider the 128-pin TQFP package constraints for PCB layout. Verify that the required memory size fits within the 264.5KB ROM and 416KB SRAM limits. Check if the supported sampling rates and bitrate ranges meet the specific MP3 standard requirements. Ensure the operating temperature range of -20°C to +75°C is sufficient for the target environment.

Audio Special Purpose Part Context

The LC823430TA belongs to onsemi's family of audio signal processors designed for portable multimedia devices. It utilizes a CMOS LSI technology optimized for low power consumption and high integration. The device replaces discrete solutions by combining DSP, audio codec, and power amplification functions into a single chip, reducing board space and complexity for consumer electronics manufacturers.

Audio Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult onsemi technical support for cross-reference information or evaluate other models within the LC8234xx series based on pin compatibility and feature sets.

Audio Special Purpose FAQ

What boot modes are supported by the LC823430TA?

The device supports multiple boot modes selectable via BMODE pins, including Internal ROM Boot from SD interface Ch0 (Physical, IPL, Partition) and External Serial Flash Boot via SIO Ch0. Test modes are also available but not recommended for normal operation.

Can the LC823430TA encode and decode MP3 files?

Yes, it supports both recording (encoding) and playback (decoding) of MP3 files using MPEG1/2/2.5 Layer3 compression. It handles stereo and mono formats with sampling frequencies ranging from 8kHz to 48kHz.

What is the maximum output power of the built-in speaker amplifier?

The AB class speaker amplifier can deliver a maximum output of 300mW when powered at 3.0V with an 8Ω speaker load and 1dB gain setting.