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SM6451BV Datasheet Audio Variable Volume Ic

Manufacturer: Nippon Precision Circuits Inc

Overview: SM6451BV NIPPON PRECISION CIRCUITS INC. Audio Variable Volume IC OVERVIEW The SM6451BV is a 3-wire serial-controlled electronic variable volume IC for audio applications. It provides electronic volume control for a stereo system (left and right channels), and independent channel attenuation and muting, with greatly enhanced digital zip noise suppression. 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.

General Description

Number 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1.

Name RSTN ADRS1 ADRS2 DV D D LOUT LIN AV D D VRL VRR AV S S RIN ROUT DV S S MLEN MCK MDT I/O 1 Ip Ip Ip – O I – O O – I O – Ip Ip Ip A/D1 D D D D A A A A A A A A D D D D Description System reset input (LOW -level reset) Chip address set 1 Chip address set 2 Digital supply Left-channel audio output Left-channe

Key Features

  • s s PINOUT (Top View) s s s s s s 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 RSTN ADRS1 ADRS2 DVDD LOUT LIN AVDD VRL 1 16.

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