NJU72341V-TE2

Audio Special Purpose Overview

The NJU72341V-TE2 is a dual-channel electronic volume IC controlled via an I2C bus interface, featuring external mute capabilities. It operates within a supply voltage range of 4.5V to 14.5V and draws a typical supply current of 5.5mA. The device provides low distortion (0.002% typ.) and low noise (2.0µVrms typ.). Volume control spans from 0dB down to -95dB in 1dB steps, with input gain options of 0dB, +3dB, +6dB, or +9dB. It includes zero-cross detection for smooth transitions and is housed in a compact SSOP-14 package.

Audio Special Purpose Feature Summary

• I2C Bus Control: Fully programmable volume and gain settings via standard I2C interface.
• Low Distortion & Noise: Typical THD of 0.002% and output noise of 2.0µVrms.
• Wide Voltage Range: Operates on supply voltages from 4.5V to 14.5V.
• External Mute & Zero-Cross: Dedicated mute terminal and zero-cross detection for glitch-free operation.

Audio Special Purpose Applications

• Audio Systems
• Consumer Electronics
• Industrial Audio Equipment

Audio Special Purpose Procurement Notes

Verify the specific ordering suffix 'TE2' against the manufacturer's datasheet to confirm packaging details such as tape and reel specifications. Ensure the I2C pull-up resistors and load capacitance comply with Standard or Fast mode requirements defined in the electrical characteristics. Confirm that the operating temperature range of -40°C to +85°C meets the application environment constraints.

Audio Special Purpose Selection Notes

Select this component when a digital-controlled stereo volume with low noise performance is required. Ensure the system supports I2C communication at up to 400kHz. Verify that the maximum input voltage does not exceed the supply voltage. Consider the SSOP-14 package dimensions for PCB layout compatibility. Check if the external mute pin logic levels align with the controlling microcontroller outputs.

Audio Special Purpose Part Context

The NJU72341 belongs to the NJU7234 series of audio signal processors manufactured by Nisshinbo Micro Devices Inc. It is designed as a specialized audio volume controller utilizing CMOS technology. The device integrates both analog signal paths and digital control logic into a single small package, serving as a bridge between digital control systems and analog audio circuits.

Audio Special Purpose Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult the manufacturer's official documentation for potential cross-references or updated product recommendations.

Audio Special Purpose FAQ

What is the default state of the NJU72341 upon power-on?

The control register default value is all '0', which corresponds to a Mute setting. The device starts up in the MUTE state, and users should remove the mute after initialization.

How is the reference voltage (VREF) determined?

The VREF pin provides a reference voltage typically equal to half the supply voltage (V+/2). For example, at a 9V supply, VREF is typically 4.5V.

What is the resolution of the main volume control?

The main volume (Volume B) can be adjusted in 1dB steps from 0dB down to -95dB, or set to Mute.