SM6451A Datasheet, PDF (1/13 Pages) Nippon Precision Circuits Inc – Audio Variable Volume IC

SM6451A
Audio Variable Volume IC
OVERVIEW
The SM6451A 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
SM6451A devices to be connected and individually controlled over the 3-wire control interface from a single
CPU. It is available in 16-pin TSSOP packages.
FEATURES
I Stereo inputs and outputs
I Attenuation function
• 2-channel independent control
• 1.0dB/step over 80 steps
• 0 to −80dB range
I Mute function
I 3-wire serial data control (MDT, MCK, MLEN)
I Chip addressing (up to 4 devices can be connected
in parallel)
I Low noise
• ≤ 0.002% THD + noise
• 10µVrms residual noise
I 5V single power supply
I Silicon-gate CMOS process
I Package: 16-pin TSSOP (Pb free)
APPLICATIONS
I Audio equipment
ORDERING INFORMATION
PINOUT
(Top view)
RSTN 1
ADRS1
ADRS2
DVDD
LOUT
LIN
AVDD
VRL 8
16 MDT
MCK
MLEN
DVSS
ROUT
RIN
AVSS
9 VRR
PACKAGE DIMENSIONS
(Unit: mm)
Weight: 0.07g
Device
SM6451AT
Package
16-pin TSSOP
5.20MAX
5.00 ± 0.08
0.17 ± _0.05
0.225TYP
0.65
0.08
+ 0.08
0.22 − 0.07
0.13 M
0 to 8
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