NJU72343V-TE1

Audio Special Purpose Overview

The NJU72343V-TE1 is an 8-channel electronic volume control IC manufactured by Nisshinbo Micro Devices. It features independent channel control via a 2-wired serial bus interface (I2C compatible), with selectable chip addressing for multi-device systems. The device supports dual power supplies of ±4.5V to ±7.5V or a single supply configuration. Key electrical parameters include a maximum attenuation of -120dB, total harmonic distortion (THD+N) of 0.0004% at 1kHz, and output noise of -117dBV. It incorporates zero-cross detection to minimize switching noise and operates within a temperature range of -40°C to +85°C in a 32-LSSOP package.

Audio Special Purpose Feature Summary

• 8-channel electronic volume with independent control and 2-input selectors for 4 channels
• 2-wired serial bus interface with selectable chip addresses (ADR pin)
• Volume adjustment from +31.5dB to -95dB in 0.5dB steps with mute function
• Zero-cross detection circuit to minimize switching noise
• Low THD+N: 0.0004% typical

Audio Special Purpose Applications

• Multi-channel audio systems
• AV amplifiers
• DVD receivers

Audio Special Purpose Procurement Notes

Verify the specific ordering suffix against the manufacturer's documentation to confirm packaging details such as tape and reel specifications. Ensure that the voltage supply rails match the recommended operating range of ±4.5V to ±7.5V for optimal performance. Confirm that the design accommodates the required decoupling capacitors for the AREF and VDDOUT pins as specified in the application circuits.

Audio Special Purpose Selection Notes

Select this component for applications requiring precise digital control of multiple audio channels. The device supports both dual and single power supply configurations, offering flexibility in system design. Consider the 32-LSSOP package dimensions for PCB layout constraints. Verify compatibility with the host controller's serial bus timing requirements, specifically data hold and setup times.

Audio Special Purpose Part Context

This part belongs to the NJU72 series of audio signal processing ICs from Nisshinbo Micro Devices. It is designed for high-fidelity audio applications where low distortion and high channel separation are critical. The device integrates logic control and analog signal paths on a single CMOS chip.

Audio Special Purpose Replacement Considerations

No direct public substitute part numbers are confirmed in the provided documentation. Check for functional equivalents within the NJU72 series or other Nisshinbo audio processors if availability is an issue.

Audio Special Purpose FAQ

How is the chip address configured?

The chip address is set using the ADR terminal (Pin 2). Connecting it to Low selects address 80H, while connecting it to High selects address 82H, allowing two chips to operate on the same serial bus line.

What is the maximum attenuation capability?

The maximum attenuation is -120dB when the volume is set to Mute, measured at 1kHz with a 2Vrms input and A-weighting filter.

Can the device operate with a single power supply?

Yes, the NJU72343 supports a single power supply configuration, in addition to the dual supply option of ±4.5V to ±7.5V.