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)
* Tone control
Bass/Treble, 0dB~+10dB(2dB/step)
GENERAL DESCRIPTION
The SM7346 is 6 channels electronic volume
controlled by 3-wire serial data. The IC is suitable
for use in DVD systems and AV.
Page 1
APPLICATIONS
* DVD
* Home Audio Equipment
* AV
PIN ASSIGNMENTS
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
TSSOP
44PIN
Cout
Lout
Rout
SRout
SLout
SWout
AGND
DGND
LATCH
DATA
CLK
DVDD
AVSS
CL1
RTRE
RBASS2
RBASS3
CR1
CR2
CL2
RBASS1
GNDC
GNDR
Cin
SRin
SLin
GNDS
SWin
AVDD
OUT1
OUT2
OUT3
OUT4
Rin
GNDL
LTRE
LBASS2
LBASS3
BYPASSR
BYPASSL
Lin
LBASS1
NC
NC
35
33
34
36
38
39
40
41
42
43
44
32
31
27
25
26
29
28
30
24
23
37
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
2
2
GNDC
GNDR
Cin
SRin
SLin
GNDS
SWin
AVDD
OUT1
OUT2
OUT3
OUT4
Rin
GNDL
LTRE
LBASS2
LBASS3
BYPASSR
BYPASSL
Lin
LBASS1
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
AVSS
CL1
RTRE
RBASS2
RBASS3
CR1
CR2
CL2
RBASS1
MAY.2003
Page 2
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
BLOCK DIAGRAM
MAY.2003
BypassR
BypassL
L output
R output
Latch Data CLK
C output
SW output
SL output
SR output
volume
volume
-com
interface
C input
SW input
SL input
SR input
L input
R input
tone
PIN DESCRIPTION (Pin count base on 42pin SDIP)
Page 3
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
+7V
Connect to analog GND
L.R Volume INPUT
33,34,35,36
6,8,9,11
18 to 22 K
(TYP)
70 K
(TYP)
13,15
OUTPUT: PMOS
Transistor
open drain
DVDD(=5V)
1 to 4
Pin No.
Function
Analog positive Power supply
Tone INPUT
Port OUTPUT
GND
Volume INPUT
Volume OUTPUT
Circuit
-7V
+5V
18 to 22 K
(TYP)
31,32
70 K
(TYP)
16,17
18,25
26,28
39,40,41
INPUT:schmitt trigger type
S
tone Treble cycle control
Tone OUTPUT
L OUTPUT
R OUTPUT
Analog negative Power supply
Analog GND
Digital GND
Latch INPUT
Data INPUT
Clock INPUT Forward data
Digital Power supply
L.R Volume INPUT
tone Bass cycle control
L OUTPUT
R OUTPUT
in BYPASS mode
19,24
20,23
2.3 K
(TYP)
21,22
MAY.2003
1
2
3
4
5
7
10
12
14
6
8
9
11
36
35
34
33
13
15
18
25
27
29
31
32
30
37
38
39
40
41
42
26
28
19
24
20
23
21
22
16
17
31
32
OUT4
OUT3
OUT2
OUT1
AVDD
GNDS
GNDC
GNDR
GNDL
SW in
SW out
SR out
SL out
31,32
70 K
(TYP)
27,29
18 to 22 K
(TYP)
Symbol
DATA
CLK
DVDD
BYPASSR
BYPASSL
L out
SR in
SL in
C in
C out
R in
L in
LTRE
RTRE
CR1
CL1
L out
R out
AVSS
AGND
DGND
LATCH
CR2
CL2
LBASS3
RBASS3
LBASS2
RBASS2
LBASS1
RBASS1
R out
PIN CONFIGURATION AND IC INTERNAL BLOCK DIAGRAM ( Pin count base on 42pin )
Page 4
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MCU
I/F
OUTPUT
PORT
volume
volume
volume
volume
volume
volume
OUT4
OUT3
OUT2
OUT1
SWin
Lin
Cin
Rin
SLin
SRin
BYPASSR
BYPASSL
SLout
Cout
Rout
Lout
CL1
CL2
CR1
CR2
SRout
SW out
DGND
LATCH
DATA
CLK
DVDD
tone
tone
MAY.2003
1
2
3
4
6
8
9
11
13
15
16
17
AVDD
5
42
41
40
27
28
39
38
36
35
34
32
33
31
30
29
26
AVSS
Page 5
ABSOLUTE MAXIMUM RATINGS
AMBIENT TEMPERATURE Ta []
THERMAL DERATING (MAXIMUM RATING)
Standard board
POWER DISSIPATION pd[W]
SM7346
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)
SM7346
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
SM7346
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
DIGITAL CONTROL SPECIFICATION
Four kinds of input format options are available by changing slot settings of DE and DF.
Page 8
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
( 1 )
1
OUTPUT PORT
1:High 0:Low
TONE
CONTROL
TREBLE
D01 D11 D21 D31 D41 D51 D61 D71
4
3
2
D81 D91 DA1 DB1 DC1 DD1
DF
DE
TONE
CONTROL
BASS
0
0
BY
PASS
1:ON
0:OFF
( 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 -.
MAY.2003
0
Page 9
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MAY.2003
SETTING CODE
Port output
BYPASS control
Note: Do not input other data than the above.
(1) Tone Control (bass / treble)
ATT
treble
bass
D01
D81
D11
D91
D21
DA1
D31
DB1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
0
0
1
0
1
1
0
0
0
1
1
0
1
1
1
0
0
0
0
0
0
0
1
1
-10dB
-8dB
-6dB
-4dB
-2dB
+0dB
+2dB
+4dB
+6dB
+8dB
+10dB
PORT1
PORT2
PORT3
PORT4
D41
D51
D61
D71
0
1
0
1
0
1
0
1
L
H
L
H
L
H
L
H
DD1
TONE
BYPASS
0
1
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Page 10
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
Page 11
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
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 12
ELECTRICAL CHARACTERISTICS
( Ta=25,AVDD=7.0V, AVSS=-7.0V, DVDD=5.0V, f=1kHz, unless otherwise noted. Rg=1K, Rl=10K,
TONE CONTROL, VOLUME are set to 0dB/FLAT )
(2)InputOutput Characteristics ( Pin count base on 42pin version )
(1)Power Supply Characteristics ( Pin count base on 42pin version )
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Parameter
Symbol
Test condition
Analog positive circuit
current
Analog negative circuit
current
Digital circuit current
Aldd
Alss
Dldd
Current at pin 5
No signal
Unit
mA
mA
mA
Limits
24
24
1.0
35
35
2.0
Current at pin 30
No signal
Current at pin 42
No signal
typ
Max
Min
MAY.2003
Port output current
IL
RL=22K
mA
0.2
Parameter
Symbol
Test condition
Unit
Limits
Min
typ
Max
Input resistance
13,15,16,17,27,29pin
K
Ri
70
150
35
Pass gain
Gv
Vi=0.2Vrms,FLAT
6,8,9,11,13,15,16,17pin INPUT
31~36pin OUTPUT
dB
0
2.0
-2.0
Maximum output
voltage
VOM
6,8,9,11,13,15,16,17pin 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
31,32pin
JIS-A,VOL=0dB
Vrms
Vn(tone)
Vrms
8
20
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
-92
-86
CT
Vo=0.5Vrms,RL=10K,
JIS-A, Rg=1K
Crosstalk between
channels
dB
-80
-100
Page 13
(3) Tone Control Characteristics ( Pin count base on 42pin version )
RECOMMENDED OPERATING CONDITIONS
Supply voltage range
Rated supply voltage
Analog
Digital
+6.0 ~ +8.0V
+7.0V
4.5 ~ 5.5V
5.0V
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
MAY.2003
Parameter
Symbol
Test condition
Unit
Limits
T -10dB
T -8dB
T -6dB
T -4dB
T -2dB
T +2dB
T +4dB
T +6dB
T +8dB
T +10dB
Balance between
channel
Tone control voltage
gain
Vo=0.2Vrms,f=1kHz
TREBLE(f=10kHz)
BASS(f=100Hz)
INPUT 13,15pin
OUTPUT 31,32pin
Input pin13,15 Vo=0.2Vrms
Output pin31,32,
BALT
Min
typ
Max
dB
dB
-8
-12
-10
-6
-2.5
-4.5
3
-1
5.5
7.5
12
10
+1.5
-8
-4
-6
2
-2
4
6
10
8
0
-10
-5.5
-7.5
1
-3
2.5
4.5
8
6
+1.5
dB
dB
dB
dB
dB
dB
dB
dB
dB
SIGNAL PROCESSING DIAGRAM
Page 14
TONE CONTROL
(+10dB to -10dB)
Note:
(1) The resistance value of Volume change about 18 to 22K by attenuated condition.
(2) No built in a zero cross circuit.
(3) When the mode changed (BYPASS/TONE), it is necessary the muting function.
BYPASS
70K
VOLUME Lch, Rch
(0dB to -dB)
3.3 F
BASS
TREBLE
TONE in
70K
70K
8200pF
3.3 F
3.3 F
3.3 F
+
_
+
_
+
_
0.015 F
+
_
0.33 F
VOLUME in
VOLUME Cch,SWch,SLch,SRch(0dB to -dB)
3.3 F
3.3 F
+
_
DVDD(=5V)
OUTPUT PORT
OUTPUT port:
PMOS transistor open drain
S
CLK, DATA, LATCH
INPUT: Schmitt trigger type
MAY.2003
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Page 15
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
APPLICATION EXAMPLE ( Pin count base on 44pin )
22K
Units Resistance: / Capacitance: F
44
43
37
39
35
41
38
40
36
32
42
24
25
26
27
28
29
30
31
33
34
1
2
8
6
10
4
7
5
9
13
3
21
20
19
18
17
16
15
14
12
11
MCU
I/F
MCU
OUT-
PUT
PORT
volume
volume
volume
volume
volume
volume
OUT4
OUT1
OUT2
OUT3
AVDD=7V
SWin
3.3 F
SRin
SLin
Cin
Rin
Lin
8200pF
BYPASSR
BYPASSL
0.015 F
0.33 F
DVDD=5V
DGND
AGND
8200pF
AVSS= -7V
3.3 F
22
23
NC
NC
3.3 F
SWout
SRout
Cout
SLout
Rout
Lout
tone
tone
22K
22K
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
3.3 F
3.3 F
22K
0.015 F
0.33 F
3.3 F
3.3 F
MAY.2003
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
Figure1 : Tone Response of Treble
MAY.2003
Page 16
Figure4 :
Distortion and Noise vs. Frequency
(Vin=250mV,AV=0dB,ALL CONTROLS
FLAT, VOLUME=0dB,-20dB)
Figure3 :
Crosstalk vs. R/L ch
Figure2 : Tone Response of Bass
Page 17
MAY.2003
PACKAGE OUTLINE ( TSSOP44)
NOTE:
1. CONTROLLING DIMENSION 1 INCH.
2. LEAD FRAME MATERIAL ALLOY 42.
3. DIMENSION "D" DOES NOT INCLUDE MOLD FLASH, THE BAR BURRS AND GATE BURRS.
MOLD FLASH,THE BAR BURRS AND GATE BURRS SHALL NOT EXCEED 0.066"(0.15mm) PER END DIMENSION "E1" DOES NOT
INCLUDE INTERLEAD FLASH. INTERLEAD FLASH NOT EXCEED 0.010" (0.25mm) PER SIDE.
4. DIMENSION "b" DOES NOT INCLUDE DAMBAR PROTRUSION.
ALLOWABLE DAMBAR PROTRUSION SHALL BE 0.003"(0.08mm) TOTAL IN EXCESS OF THE "b" DIMENSION AT MAXIMUM
MATERIAL CONDITION DAMBAR CANNOT BE LOCATED ON THE LOWER RADIUS OR THE FOOT. MINMUM SPACE BETWEEN
PROTRUSION AND AN ADJACENT LEAD TO BE 0.0028"(0.07mm).
5. TOLERANCE +0.010"(0.25mm) UNLESS OTHERWISE SPECIFIED.
6. OTHERWISE DIMENSION FOLLOW ACCEPTABLE SPEC.
7. REFERENCE DOCUMENT:JEDEC SPEC MS-024.
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
C
DETAIL B
12 (4X)
A
A1 A2
D
ZD
e
b
r
PIN I INCCATOR 0.047
SURFACE POLISHED
BOTTOM E-PIN INDENT 0.069
(0.001"~0.004" OP)
E
E
1
DETAIL B
0.010
L
12 (4X)
GAGE
PLANE
SYMBOLS
MIN
NOM
MAX
DIMENSIONS IN
MILLIMETERS
DIMENSIONS IN INCHES
A
A1
A2
b
C
D
E
E1
e
L
ZD
y
1.00
0.05
0.95
0.30
0.12
18.313
11.684
10.058
0.40
0.00
0
o
1.00
0.35
18.415
11.836
10.160
0.800
0.50
0.805
1.20
0.15
1.05
0.45
0.21
18.517
11.938
10.262
0.60
0.076
8
o
0.039
0.002
0.037
0.012
0.0047
0.721
0.460
0.396
0.0157
0.000
0
o
0.039
0.014
0.725
0.466
0.400
0.315
0.020
0.0317
0.047
0.006
0.041
0.018
0.0083
0.729
0.47
0.404
0.0236
0.003
8
o
MAX
NOM
MIN
Page 18
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
SM7346
SAMHOP Microelectronics Corp.
6 CHANNELS VOLUME CONTROLLER
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 )
PDF 
ZIP