Page 1
PIN ASSIGNMENTS
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
GNDC
GNDR1
Cin
SRin
SLin
GNDS
SWin
AVDD
OUT1
OUT2
OUT3
OUT4
GNDR2
GNDL1
Lin
NC
NC
Rin
GNDLR
GNDL2
NC
SDIP 42PIN
1
0
1
2
1
1
8
9
7
6
5
4
3
2
1
1
3
1
4
1
8
2
0
1
9
1
6
1
7
1
5
2
1
33
31
32
35
34
36
37
38
39
40
41
42
30
29
25
23
24
27
26
28
22
Cout
Lout
Rout
SRout
SLout
SWout
AGND
DGND
LATCH
DATA
CLK
DVDD
AVSS1
AVSS2
NC
NC
NC
NC
NC
NC
NC
MAY.2003
FEATURES
* 4 Output ports
* Built-in microcomputer interface circuit con-
trolled by 16-bit serial data.
* Electronic volume
Volume level......0dB~-79dB, - dB(1dB/
step)
GENERAL DESCRIPTION
The SM7347 is 6 channels electronic volume
controlled by 3-wire serial data. The IC is suitable
for use in DVD systems and AV.
APPLICATIONS
* DVD
* Home Audio equipment
* AV
C input
SW input
SL input
SR input
L input
R input
Page 2
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
BLOCK DIAGRAM
MAY.2003
Latch Data CLK
volume
-com
interface
C output
SW output
SL output
SR output
L output
R output
PIN DESCRIPTION (Pin count base on 42pin SDIP)
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Page 3
MAY.2003
+7V
Connect to analog GND
OUTPUT: PMOS
Transistor
open drain
DVDD(=5V)
1 to 4
Pin No.
Function
Analog positive Power supply
Port OUTPUT
GND
Circuit
OUT4
OUT3
OUT2
OUT1
AVDD
GNDS
GNDC
GNDR1
GNDL1
Symbol
1
Volume INPUT
SW in
SR in
SL in
C in
GNDL2
GNDR2
GNDLR
R in
L in
Volume OUTPUT
SW out
SR out
SL out
C out
L out
R out
AVSS2
-7V
Analog negative Power supply
AVSS1
+5V
39,40,41
INPUT:schmitt trigger type
S
Analog GND
Digital GND
Latch INPUT
Data INPUT
Clock INPUT Fowrward data
Digital Power supply
DATA
CLK
DVDD
AGND
DGND
LATCH
2
3
4
5
7
10
6
8
11
9
16
18
36
35
33
34
31
32
29
30
37
38
39
42
40
41
12
13
14
15
17
18 to 22 K
(TYP)
31~36
6,8,9,11,16,18
Page 4
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MAY.2003
PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM
MCU
I/F
OUT-
PUT
PORT
volume
volume
volume
volume
volume
volume
OUT4
OUT3
OUT2
OUT1
SWin
LIN
Cin
Rin
SLin
SRin
SLout
Cout
Rout
Lout
SRout
SW out
DGND
LATCH
DATA
CLK
DVDD
Page 5
ABSOLUTE MAXIMUM RATINGS
AMBIENT TEMPERATURE Ta []
THERMAL DERATING (MAXIMUM RATING)
Standard board
POWER DISSIPATION pd[W]
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Parameter
Unit
Supply Voltage
V
Power dissipation
mW
Storage temperature
Symbol
Vsupply
Pd
Topr
Tstg
K
Operating temperature
Ratings
16.0
1000
10
-20~+75
-40~+125
Conditions
AVDD-AVSS
Ta<25
o
C
Ta>25
o
C
*standard board
Thermal derating
o
C
o
C
mW /
o
C
25
50
75
100
125
150
1.5
1.0
0.5
0
MAY.2003
Page 6
RECOMMENDED OPERATING CONDITION
DATA TIMING(Recommended conditions)
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Note1 : AVSS<DGND<DVDD<AVDD or AVSS<DGND<AVDD<DVDD
Note2 : AGND=(AVSS+AVDD ) / 2
Parameter
Analog positive
Supply Voltage
Analog negative
Supply Voltage
Digital
Supply Voltage
High-level Input
Voltage
Low-level Input
Voltage
Symbol
AVDD
AVSS
DVDD
VIH
VIL
Condition
Min.
6.0
- 8.0
4.5
DVDD/2+1
DGND
Typ.
7.0
- 7.0
5.0
Max.
8.0
- 6.0
5.5
DVDD
DVDD/2-1
Unit
V
V
V
V
V
H
L
H
L
H
L
DATA
CLOCK
LATCH
D0
D0
DF
D1
DE
Note: CLOCK and LATCH function at raising edges of pulse.
MAY.2003
DIGITAL BLOCK TIMING REGULATION
Page 7
CLOCK, DATA, LATCH TIMING
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
t
f
CLOCK
DATA
LATCH
tcr
75%
25%
tf
75%
25%
t
WHL
t
SD
t
HD
t
WHC
tf
tr
t
WLC
tr
t
SL
25%
75%
tr
t
SC
25%
Symbol
Unit
sec
Min
Parameter
LATCH setup time
Limits
tcr
t
WHC
t
HD
tsc
t
WHL
t
SD
tf
tr
t
WLC
t
SL
CLOCK cycle time
CLOCK pulse width("H"level)
CLOCK pulse width("L"level)
CLOCK,DATA,LATCH rise time
CLOCK,DATA,LATCH fall time
DATA setup time
DATA hold time
LATCH pulse width
CLOCK start time after LATCH
Max
Typ
8
3.2
3.2
3.2
1.6
1.6
0.8
2
3.2
0.8
MAY.2003
Page 8
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MAY.2003
SETTING CODE
(1) Port Output
Note: Do not input other data than the above.
Port 1
Port 2
Port 3
Port 4
D41
D51
D61
D71
0
1
0
1
0
1
0
1
L
H
L
H
L
H
L
H
DIGITAL CONTROL SPECIFICATION
( 1 )
1
OUTPUT PORT
1:High 0:Low
0
0
0
0
D01 D11 D21 D31 D41 D51 D61 D71
4
3
2
D81 D91 DA1 DB1 DC1 DD1
DF
DE
0
0
0
0
0
0
0
1
( 3 )
( 2 )
( 4 )
D02 D12 D22 D32 D42 D52 D62 D72 D82 D92 DA2 DB2 DC2 DD2
DF
DE
1
0
VOLUME Rch
VOLUME Lch
D03 D32 D23 D33 D43 D53 D63 D73 D83 D93 DA3 DB3 DC3 DD3
DF
DE
VOLUME SWch
VOLUME Cch
1
0
D04 D14 D24 D34 D44 D54 D64 D74 D84 D94 DA4 DB4 DC4 DD4
DF
DE
1
1
VOLUME SRch
VOLUME SLch
Note:When the IC is powered up, the internal setting of channel output are fixed to - .
Four kinds of input format options are available by changing slot settings of DE and DF.
Page 9
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MAY.2003
(2)-1 Volume ( 0~-39dB )
Note: Do not input other data than the above.
Volume
D7X
DCX
D6X
DDX
D8X
D9X
DAX
DBX
D0X
D1X
D2X
D3X
D4X
D5X
A
T
T
0
1
4
5
2
3
6
7
10
11
8
9
24
25
28
29
26
27
30
31
34
35
32
33
12
13
16
17
14
15
18
19
22
23
20
21
36
37
38
39
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
1
1
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
0
0
1
1
0
0
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
1
1
1
1
1
1
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Page 10
MAY.2003
(2)-2 VOLUME ( 40 ~ dB )
Note: Do not input other data than the above.
Volume
D7X
DCX
D6X
DDX
D8X
D9X
DAX
DBX
D0X
D1X
D2X
D3X
D4X
D5X
A
T
T
40
41
44
45
42
43
46
47
50
51
48
49
64
65
68
69
66
67
70
71
74
75
72
73
52
53
56
57
54
55
58
59
62
63
60
61
76
77
78
79
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
1
1
1
1
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
0
0
0
1
1
0
0
1
1
0
0
0
0
1
1
0
0
1
1
0
0
1
1
1
1
1
1
1
1
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
1
0
1
0
0
0
0
dB
Page 11
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MAY.2003
Page 11
ELECTRICAL CHARACTERISTICS
( Ta=25,AVDD=7.0V, AVSS=-7.0V, DVDD=5.0V, f=1kHz, unless otherwise noted. Rg=1K, Rl=10K,
VOLUME are set to 0dB/FLAT )
(2)InputOutput Characteristics
(1)Power Supply Characteristics
Parameter
Symbol
Test condition
Analog positive circuit
current
Analog negative circuit
current
Digital circuit current
Aldd
Alss
Dldd
Current at pin 5
No signal input
Unit
mA
mA
mA
Limits
24
24
1.0
35
35
2.0
Current at pin 29,30
No signal input
Current at pin 42
No signal input
typ
Max
Min
MAY.2003
Parameter
Symbol
Test condition
Unit
Limits
Min
typ
Max
Input resistance
6,8,9,11,16,18pin
K
Ri
70
150
35
Pass gain
Gv
Vi=0.2Vrms,FLAT
6,8,9,11,16,18pin INPUT
31~36pin OUTPUT
dB
0
2.0
-2.0
Maximum output
voltage
VOM
6,8,9,11,16,18pin INPUT
31~36pin OUTPUT, THD=1%
Vrms
4.2
3.0
Distortion
BW=400~30kHz
Vi=0.2Vrms,RL=10K
THD
%
0.004 0.09
Output noise
voltage
Vn(VOL)
31~36pin
JIS-A,VOL=OdB
Vrms
4
6
Signal to noise ratio
S/N
all gains=0dB; Vo=1Vrms
98
dB
105
Volume gain
between channels
Dvol
dB
0
1.5
-1.5
Maximum
attenuation
ATTmax
31~36 pin
JIS-A,VOL=-dB
dB
-100
-95
CT
Vo=0.5Vrms,RL=10K,
JIS-A, Rg=1K
Crosstalk between
channels
dB
-75
-100
Port output current
IL
RL=22K
mA
0.2
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
RECOMMENDED OPERATING CONDITIONS
Supply voltage range
Rated supply voltage
Analog
Digital
+6.0 ~ +8.0V
+7.0V
4.5 ~ 5.5V
5.0V
SIGNAL PROCESSING DIAGRAM
Note:
(1) The resistance value of Volume change about 18 to 22K by attenuated condition.
(2) No built in a zero cross circuit.
Page 12
MAY.2003
VOLUME Rch,Lch,Cch,SWch,SLch,SRch (0dB to -dB)
3.3 F
VOLUME in
3.3 F
+
_
DVDD(=5V)
OUTPUT PORT
OUTPUT port:
PMOS transistor open drain
S
CLK, DATA, LATCH
INPUT: Schmitt trigger type
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MCU
I/F
1
2
8
6
10
4
7
5
9
13
3
21
20
19
18
17
16
15
14
12
11
42
41
35
37
33
39
36
38
34
30
40
22
23
24
25
26
27
28
29
31
32
APPLICATION EXAMPLE
Units Resistance: / Capacitance: F
22K
22K
MCU
OUT4
OUT1
OUT2
OUT3
22K
AVDD=7V
SWin
3.3 F
22K
3.3 F
3.3 F
SRin
SLin
Cin
Rin
Lin
DVDD=5V
DGND
AGND
AVSS=-7V
SWOUT
SROUT
SLOUT
COUT
ROUT
LOUT
OUT-
PUT
PORT
volume
volume
volume
volume
volume
volume
3.3 F
3.3 F
3.3 F
3.3 F
3.3 F
3.3 F
3.3 F
3.3 F
3.3 F
Page 13
MAY.2003
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Figure1 :
Crosstalk vs. R/L ch
Figure2 :
Distortion and Noise vs. Frequency
(Vin=250mV,AV=0dB,ALL CONTROLS
FLAT, VOLUME=0dB,-20dB)
MAY.2003
Page 14
SM7347
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Page 15
E
1
15"(4X)
eB
F
10REF
15"(2X)
B1
1BREF
5"(2X)
A1
A
70 (TYP)
PACKAGE OUTLINE DIMENSION FOR P-SDIP 42 PIN
MAY.2003
SYMBOL
MIN
NOM
MAX
MIN
NOM
MAX
Dimonation in mil
Dimenation in mm
A
A1
B1
D
E1
F
eB
155
70
36
1448
549
592
600
0
o
160
72.5
40
1450
550
800
650
7.5
o
165
74
44
1452
551
608
700
15
o
3.937
1.78
0.914
36.78
13.945
15.037
15.24
0
o
4.064
1.842
1.270
36.83
13.970
15.240
16.510
7.5
o
4.2
1.88
1.118
36.88
13.998
15.443
17.78
15
o
PACKAGE OUTLINE ( SDIP42 )
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