BU9253AS_05 Datasheet, PDF (7/17 Pages) Rohm – Karaoke/Surround Digital Echo

●Pin description, Block diagram, Application circuit
＜BU9253AS/FS＞
・Description of terminal
BU9253AS
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
BU9253FS
Pin No.
1
2
－
3
4
5
6
7
8
9
10
11
12
13
14
－
15
16
Symbol
GND
ECHO VR
NC1
BIAS
DAINT IN
DAINT OUT
DALPF IN
DALPF OUT
MIX OUT
MIX IN
ADLPF IN
ADLPF OUT
ADINT OUT
ADINT IN
VCC
NC2
MUTE
CR
Function
GND pin
Echo level DC control
pin
Not connected
Analog unit DC bypath
pin
DA side integrator input
pin
DA side integrator
output pin
DA side LPF input pin
DA side LPF output pin
Mixing output of original
sound and echo sound
Original sound input pin
of mixing amplifier
AD side LPF input pin
AD side LPF output pin
AD side integrator
output pin
AD side integrator input
pin
VCC pin
Not connected
Mute control pin
Oscillator CR pin
・BU9253AS pin assignment
CR
MUTE
NC
VCC ADINTIN ADINTOUT ADLPFOUT ADLPFIN MIXIN
18
17
16
15
14
13
12
11
10
1
2
3
GND
ECHO VR
NC
4
5
6
7
8
9
BIAS DAINTIN DAINTOUT DALPFIN DALPFOUT MIXOUT
Fig.25 BU9253AS pin assignment
・BU9253FS pin assignment
CR
MUTE
VCC ADINT IN ADINT OUT ADLPF OUT ADLPF IN MIX IN
16
15
14
13
12
11
10
9
1
GND
2
ECHO VR
3
4
5
6
7
8
BIAS DAINT IN DAINT OUT DALPF IN DALPF OUT MIX OUT
・BU9253AS Block diagram, Application circuit
Fig.26 BU9253FS pin assignment
VC C
C1
R3
100p
VC C
22k
+
R2
C2
39k
22u
18
17
16
VC C
+
100u
0.1u
C3
0.01u
15
14
13
R7
C5
20k
0.012u
R4
R5
10k
R6 ^20k
8.2k
C4
12 4700p 11
10
IN
+
2.2u
OSC
MUTE
-
A/D
+
A/D side LAP/DF側oLpPeFr用atオioペnアamンプplifier
COUNTOR
SRAM
D/A side LP_DF_/Ao_側pe_Lr_Pat_Fio_用n_オam_ペp_アlif_ンie_プr
MIX
+
D/A
-
1
2
3
4
5
6
7 ^C8
8
9
3300p
R8
2.2k
VC C
VR1
10k
+
22u
C6
0.01u
R9
10k 0.47u
R10
4.7k
R11
C7
15k
0.01u
Fig.27 Application circuit
7/16
OUT
+
2.2u