UPC1857A Datasheet, PDF (4/44 Pages) NEC – SOUND CONTROL IC WITH SURROUND AND I2C BUS

µPC1857A
BLOCK DIAGRAM
820 k
0.082 µF 680 pF 22 µF
MFO
29
MFI
30
LF1
28
+
1
2
VCC
DGND
24
23
+
ADS SDA SCL
22 21 20
12 V
VCC
15
2.2
+
µ
F
0.047
µF
OFL1 OFL2 LBC
19 18
10
3300 pF 3.3 µF
LTC VOL-C
9
17
Lin
+ ₂₆
2.2 µF ⁺
+
-
LPF
-
+
Rin
+ ₂₇
2.2 µF
1
2
VCC
Phase shifter
PS1 PS2 PS3 PS4
I²C bus
interface
L
+
L+R
+
+
L+
Effect
control
+
LPF
-
R-
Output
select
+
+
R
+
Offset
absorption
Offset
absorption
Tone
control
Lout
14
Volume,
balance
control/
mute
Tone
control
Rout
13
MIX
+ ₂₅
2.2 µF
2345
FC1 FC2 FC3 FC4
0.1 µF
0.022 µF
2200 pF 0.022 µF
6
LF2
1000 pF
1
AGND
11 12
8
OFR1 OFR2 RBC
+ _{0.047 µ F}
2.2 µF
7
16
RTC + BAL-C
3300 pF 3.3 µF
4