NJM2174V-TE1

Overview

The NJM2174V-TE1 is a low-voltage audio line amplifier with an integrated mute function, manufactured by Nisshinbo Micro Devices Inc. It operates within a supply voltage range of 4.5 to 5.5 V and draws a typical operating current of 2.5 mA at 5 V. The device features a closed-loop voltage gain of 3.5 dB at 1 kHz and provides a typical mute level of -85 dB. Key electrical characteristics include a maximum output voltage of 4 dBV at 0.1% THD, a supply voltage rejection ratio of 60 dB, and a channel separation of 90 dB. It utilizes bipolar technology and is housed in an SSOP-14 package.

Feature Summary

• Integrated mute circuitry designed to minimize turn-on and turn-off noise in digital audio applications.
• Dual-channel stereo configuration suitable for amplifying small line signals in consumer electronics.
• Fixed internal closed-loop voltage gain optimized for direct connection to digital audio items.

Applications

• Audio line amplifiers for digital audio equipment
• Line-out circuits in consumer electronic devices

Procurement Notes

Verify the specific part number suffix against official manufacturer documentation to confirm pinout compatibility and functional specifications. Ensure that the ordering information matches the exact component requirements for your design. Cross-reference datasheet parameters with supplier catalogs to validate availability and authenticity before procurement.

Selection Notes

Select this component for designs requiring a fixed-gain stereo line amplifier with built-in mute functionality. It is appropriate for single-supply operations within the 4.5 V to 5.5 V range. Consider its bipolar technology and SSOP-14 packaging when evaluating space constraints and thermal performance for portable or compact audio systems.

Part Context

The NJM2174 belongs to the NJW/NJM series of audio ICs produced by Nisshinbo Micro Devices. This series focuses on low-voltage audio processing solutions for consumer electronics. The NJM2174 specifically addresses the need for simple, cost-effective line amplification with noise reduction features for digital audio interfaces.

Replacement Considerations

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

FAQ

How does the mute function operate?

The mute function is controlled via two terminals (MUTE1 and MUTE2). Setting both inputs to Low disables the signal output, while setting MUTE1 to High enables the typical 3.5 dB voltage gain. Other combinations also disable output.

What is the purpose of the MUTEC terminal?

The MUTEC terminal is used for pop noise reduction during the mute switching process, ensuring quieter transitions when powering on or off.