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SM6451 Datasheet(PDF) 8 Page - Nippon Precision Circuits Inc

Part # SM6451
Description  Audio Variable Volume IC
PDF  12 Pages
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Manufacturer  NPC [Nippon Precision Circuits Inc]
Direct Link  http://www.npc.co.jp/en
Logo NPC - Nippon Precision Circuits Inc

SM6451 Datasheet(HTML) 8 Page - Nippon Precision Circuits Inc

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SM6451BV
NIPPON PRECISION CIRCUITS—8
D9, D8
Channel select bits. The selected channel(s) are shown in table 1.
D7 to D0
Attenuation register (ATT) set bits.
Table 1. Channel select
D 9
D 8
Selected channel
L O W
L O W
Both left and right channels
L O W
HIGH
Left channel
HIGH
L O W
Right channel
HIGH
HIGH
N o change
Table 2. Attenuation setting1
1.
Outputs are muted after system reset.
Attenuation error is changed dependent on the supply voltage when attenuation level is under – 60dB. In the case of the supply voltage being
under 2.6V, mute level inverses up to the same level of – 80dB setting or more. (see Figure 6)
Attenuation
AT T H
D7
D6
D5
D4
D3
D2
D1
D0
0 dB
0 0
LO W
L O W
LO W
L O W
LO W
L O W
LO W
L O W
−1 dB
0 1
L O W
L O W
L O W
L O W
L O W
L O W
L O W
HIGH
−2 dB
0 2
L O W
L O W
L O W
L O W
L O W
L O W
HIGH
L O W
:
:::::::::
−15 dB
0 F
L O W
L O W
L O W
L O W
HIGH
HIGH
HIGH
HIGH
−16 dB
1 0
L O W
L O W
L O W
HIGH
L O W
L O W
L O W
L O W
−17 dB
1 1
L O W
L O W
L O W
HIGH
L O W
L O W
L O W
HIGH
:
:::::::::
−63 dB
3 F
L O W
L O W
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
−64 dB
4 0
L O W
HIGH
L O W
L O W
L O W
L O W
L O W
L O W
−65 dB
4 1
L O W
HIGH
L O W
L O W
L O W
L O W
L O W
HIGH
:
:::::::::
−79 dB
4 F
L O W
HIGH
L O W
L O W
HIGH
HIGH
HIGH
HIGH
−80 dB
5 0
L O W
HIGH
L O W
HIGH
L O W
L O W
L O W
L O W
Mute
51
L O W
HIGH
L O W
HIGH
L O W
L O W
L O W
HIGH
Mute
52
L O W
HIGH
L O W
HIGH
L O W
L O W
HIGH
L O W
:
:::::::::
Mute
F E
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
L O W
Mute
F F
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH
HIGH



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