Description

The SM6451BV is a 3-wire serial-controlled electronic variable volume IC designed for audio applications. It is capable of providing electronic volume control for a stereo system with independent channel attenuation and muting, making it ideal for use in audio equipment. The chip address function allows up to four SM6451BV devices to be connected and individually controlled over the 3-wire control interface from a single CPU. It is available in 16-pin VSOP packages.

Specifications and features

• Product Category: IC Chips
• Stereo inputs and outputs
• Attenuation function:
  • 2-channel independent control
  • 1.0 dB/step over 80 steps
  • 0 to -80 dB range
• Mute function
• 3-wire serial data control (MDT, MCK, MLEN)
• Chip addressing (up to 4 devices can be connected in parallel)
• Low noise
  • 0.003 % THD + noise
  • 12 µVrms residual noise
• 2.5 to 3.6 V single power supply
• Silicon-gate CMOS process

Application Scenarios

The SM6451BV is ideal for use in audio equipment.

Comparison

• Provides electronic volume control for a stereo system with independent channel attenuation and muting.
• Chip address function allows up to four SM6451BV devices to be connected and individually controlled over the 3-wire control interface from a single CPU.
• Low noise with 0.003 % THD + noise and 12 µVrms residual noise.

• The product is only suitable for audio equipment applications and not other electronic devices.