Nippon Precision Circuits Inc. (NPC) announces the development of SM6453AB, a Stereo Headphone Amplifier IC with 3-wire Serial Data Controlled Volume suitable for portable audio equipments, and its sample shipping.

The SM6453AB assembles the input signal switching, volume adjustment, bass boost function and headphone amplifier in one-chip, and enables to make the sound output circuit simplified. This IC controls the volume and each mode setting with 3-wire serial data. The SM6453AB features the Pop-noise control circuit that reduces the pop-noise caused by throwing the power supply or releasing the mute function.

The SM6453AB realizes the long-lived battery and miniaturization which are important to all the portable electronic equipments, by low voltage(1.8V min.), low current consumption(2.3mA at 2.4V supply voltage) and employing ultra-small 32-pin QFN package.