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TC9421F
SYSTEM ELECTRONIC VOLUME
TOSHIBA TC9421 F
TOSHIBA CMOS DIGITAL INTEGRATED CIRCUIT SILICON MONOLITHIC
TC9421 F
SYSTEM ELECTRONIC VOLUM E
TC9421F is a single-chip electronic volume IC
incorporating an op amp circuit developed for car
stereos.
With a few external parts, TC9421F can control a wide
range of audio functions, including main volume,
balance, fader, bass, treble, loudness, and input
switching.
FEATURES
0 Main volume : Offers 63 positions of separate left and QFP44-P-1414-0.80D
right control over the range 0~78dB Weight . 1.1g (Typ.)
and 00 (in 1--2dB/steps).
o Fader volume : Incorporates four sets of front (left
and right) and rear (left and right)
fader units for a range of 0~60dB and
00 (16 positions)
0 Tone control : i12dB for both bass and treble (13 positions)
It Input selector : Any of four input signals can be amplified with any of four gain options , 0, 6,
10, or 12dB
o Incorporates op amp circuit, reducing external parts.
It Incorporates an interface for a W-system microcomputer.
o The Si-gate process realizes a high-performance volume system.
1 2001-06-19
TOSHIBA TC9421 F
PIN CONNECTION
(R-ch)
'5 E O I-
o d, d, E il 8
I a a , '- ,
E O _- N m C) n: Cy 3 k? n:
m - - _ - - > .1 -l < >
H PI PI H H H H H H H H
33 32 31 30 29 28 27 26 25 24 23
m M 22 IFS/R-IN
IN3 35 21 Jr-our
Prl2 36 20 [IR-OUT
IN1 37 19 Ivory
vcc 38 18 [ISTB
VREF 39 (TOP VIEW) 17 [IDATA
IN1 l GND
IN2 l R-OUT
IN? IF-OUT
IN4 l FVR-IN
r- 2 '" N m - Z '- N a -
3 - - F- - 3 - Cy Cy a D
o d, o , _, -l u o
I a d, , k J:
t, C) Ed >
(L-ch)
2 2001-06-19
TOSHIBA
TC9421 F
BLOCK DIAGRAM
vss VRef VCC
A"'.h CCs p.C'2x
40 l?..b' 38
L-IN1 41 -fieil-fi7)Roo1
50m 50m
L-IN2 42 o-MH3sytuN2
INPUT SELECTOR INPUT SELECTOR
L-IN3 43 o-W-fs)-
_+ - - T-
L-IN4 44 319R-IN4
a 1 Cl
33; as. ' . . ' t g
S I L-ch R-ch I S
L-SW-OUT 1 - A-GND A-GND 33) R-SW-OUT
L-TONE-IN 2 - __SC' 32 R-TONE-IN
cl L - + + - cl
L-T1 3 MC . 31 R-T1
"t>e 50km 50km 3:
g s 13STEP 13STEP g
L-T2 - 30 R-T2
TREB TREB
12142 W?) LATCH [ll 12:42
50k / 50k /
7500 7500
L-T3 5 13STEP ¢Cl + CRESTEP 29 R-T3
5m i'iry DECODER oe,? 5m
L-TONE-OUT 6 - - 28 R-TONE-OUT
TEST CIRCUIT
MAIN VR MAIN VR
L-VR-IN 7 50ml 50k0/ 27>R-VR-IN
- '" TEP
LSI LI' 63STEP 63S
L-LD1 8 + - :> ZGDR-LD1
L-LD2 9 29R-LDZ
LS2 LS2
L-A-GNDQQ - . - (i? R-A-GND
L-VR-OUT QD— -(2]3) R-VR-OUT
BALANCE/ BALANCE/
FEDER VR FEDER VR
L-FviwsoC2. L 22>R-FVR-IN
L-FOUTQ3 + ZDR-FOUT
_ SOkQ/
165TEP 16STEP
L-ROUTQ4 2t) R-ROUT
AUTO CLEAR
56BIT SR CIRCUIT
Ily 49 t,1..7.i 49 49
GND CK DATA STB VDD
3 2001 -06-1 9
TOSHIBA TC9421 F
DESCRIPTION OF PINS
tl? SYMBOL PIN NAME FUNCTION AND OPERATION REMARKS
41 L-IN1
42 L-IN2
43 L-IN3
44 L-IN4 Four input selector circuits
37 R-IN1 Audio signal input pins Input switches can be controlled
independently -
36 R-IN2 . . .
35 R lbl3 Op amp circuit gain can be set to
- OdB, 6dB, 10dB, or 12dB
34 R-IN4
1 L-SW-OUT In t sele t r t t ins
33 R-SW-OUT pu c tit ou pu p
2 L-TONE-IN T . it . t .
32 R-TONE-IN one arcun mpu pms
3 L-T1 Tone control circuit
Insert bass control capacitor
4 L-T2
5 L-T between T1 and T2
3 Capacitor connection pins Insert treble control capacitor -
31 R-T1
30 R T between T1 (T2) and T3
- 2 Supports 13-position control (ur12dB
29 R-T3
6 L-TONE-OUT T . it t t .
28 R-TONE-OUT one arcun ou pu pins
7 L-VR-IN M . I . t . M I
am vo ume mpu pIns ain vo ume circuit
27 R-VR-IN 63-position control : 0--44dB (1dB/
8 L-LD1 steps), 44--78dB (2dB/steps) and 00
9 L-LD2 Loudness ins Balance control based on
26 R-LD1 p independent control of left and
25 R-LD2 right channels
11 L-VR-OUT Loudnees controlienabled by
Main volume output pins connecting capacitor to LD1 and LD2
23 R-VR-OUT
10 L-A-GND In-ternal op amp reference voltage
Analog ground pins plns -
24 R-A-GND Insert capacitor between these pins
and GND
12 L-FVR-IN . . . .
Fader volume input plns Fader volume circuit
22 R-FUR-IN 16-position control from 0~60dB
13 L-F-OUT F t t t . and oo
21 R-F-OUT ron ou pu pms Sound volume can be controlled -
14 L-R-OUT individually for left front, left rear,
Rear o t t ins . .
20 R-R-OUT U pu Pl right front, and right rear
2001 -06-1 9
TOSHIBA TC9421 F
KILL“ SYMBOL PIN NAME FUNCTION AND OPERATION REMARKS
16 CK Clock input pin 0 Serial data transfer clock input pin Low
threshold
17 DATA Data input pin 0 Control data input pin value
18 STB Strobe input pin 0 Data write strobe input pin input pins
38 VCC Analog power supply pin .
19 VDD Digital power supply pin Use with VCC VDD
40 l/SS Analog ground pin . -
15 GND Digital ground pin Ground pms
0 Used to determine internal op amp
reference voltage (A-GND)
39 VREF Reference voltage input pin a Incorporates resistor for dividing -
voltage between VDD and l/ss (Typ.
VREF=VDD/2)
OPERATION
1. Volume data setting
Set volume using serial data input from the CK, DATA, and STB pins. Volume data contain 56 bits.
(LSB) 1 2 3
- 51 52 53 54 55 56 (MSB)
"1 " "1 .. C1 C2 C3 C4
HHHHHH
2001 -06-1 9
TOSHIBA
TC9421 F
1) Volume control data assignment (* .' Can be omitted)
1 2 3 4
* * D01 D02
5 6 7 8
17 18 19 20
21 22 23 24
MXMXWXWX
29 30 31 32
D55 X DssX "o" X "o" X
49 50 51 52 53 54 55 56
X LD X,,..0 X "I" X ”1X C1 X C2 X C3 X C4 l
2) Chip select data (Cr-Ca)
: Input select amp gain data
: Input select data
: Bass level data
: Treble level data
: Left channel main volume data
: Right channel main volume data
: Left channel front volume data
: Right channel front volume data
: Left channel rear volume data
: Right channel rear volume data
: Loudness, chip select data
Chip select code to enable serial data line to be shared with other ICs.
For TC9421F, set c1="1", C2=C3=''0", c4="1" (1001 : 9H).
2001 -06-1 9
TOSHIBA TC9421 F
2. Input select circuit
1) Equivalent circuit
100k0.
2) Input select and gain settings
0 Gain setting
001 D02
0 Input select settings
D11 D12 D13 D14 SWI SW2 SW3 SW4
0 o o 0 OFF OFF OFF OFF
1 - - - ON - - -
- 1 - - - ON - -
- - 1 - - - ON -
- - - 1 - - - ON
(*) If turning on two or more among switches SW1~SW4 at the same time, connect 10k!)
or higher to the input pins (lN1-lhl4).
7 2001-06-19
TOSHIBA
3. Tone control circuit
1) Equivalent circuit
T3 C) "'
TONE-IN
BSO TSO
n 515$ 453
i' BS1 TS1 it
" BS2 T52 s
BS3 153 t"
s BS4 TS4 it
t M5 TSS 35
(Bass Volume) t
. M6 TS6 1;
. AAA - “1'; . AAA
[1'11 _ “u
IAAA A_A
.9k0 3.5k0 40k0 4.6k0 5.0k0 5.0k0 50m 5.0k0 45m 4.0k0 3.5k0 2.9k0 12kg
TS8 ji
TSS? If,
TS1 0 2;
TONE-OUT C)
Q541202300013170 7720 5350
6350 77201317023000
(Treble Volume)
TC9421 F
2001 -06-1 9
TOSHIBA
TC9421 F
2) Bass and treble level settings
It Bass level settings
D21 D22 D23 D24 VOLUME VALUE
0 1 1 0 +12dB
1 0 1 0 +10dB
0 0 1 0 +8dB
1 1 0 0 +6dB
0 1 0 0 +4dB
1 0 0 0 +2dB
0 0 0 0 OdB
1 1 1 1 -2dB
0 1 1 1 -4dB
1 0 1 1 -tidi?
0 0 1 1 -8dB
1 1 0 1 -10dB
0 1 0 1 -12di?
o Treble level settings
D31 D32 D33 D34 VOLUME VALUE
0 1 1 0 +12dB
1 0 1 0 +10dB
0 0 1 0 +8dB
1 1 0 0 +6dB
0 1 0 0 +4dB
1 0 0 0 +2dB
0 0 0 0 OdB
1 1 1 1 -2dB
0 1 1 1 -4dB
1 0 1 1 -6dB
0 0 1 1 -8dit
1 1 0 1 -10dB
0 1 0 1 -12dB
2001 -06-1 9
TOSHIBA TC9421 F
4. Main volume circuit
1) Equivalent circuit
VR-IN LD1 LD2 A-GND VR-OUT
30skn (A-GND)
so S1 ----- S19
o The loudness pin is connected to a 20dB tap.
0 When the loudness is ON : LS1=ON, TST=OFF, LS2=OFF
When the loudness is OFF : LS1=OFF, TST=ON, LS2=ON
2) Main volume settings
DDDDDD DDDDDD DDDDDD DDDDDD
VOLUME 4142 43 44 45 46 VOLUME 414243 44 45 46 VOLUME 414243 4445 46 VOLUME 414243 444546
VALUEDDDDDDVALUEDDDDDDVALUEDDDDDDVALUEDDDDDD
5152 53 5455 56 5152 53 5455 56 5152 53 54 55 56 5152 53 54 55 56
OdB 0 0 0 0 0 0 16dB 0 0 0 0 1 0 32dB 0 0 0 0 0 1 52dB 0 0 0 0 1 1
1dB 1 0 0 0 0 0 17dB 1 0 0 0 1 0 33dB 1 0 0 0 0 1 54dB 1 0 0 0 1 1
2dB 0 1 0 0 0 0 18dB 0 1 0 0 1 0 34dB 0 1 0 0 0 1 56dB 0 1 0 0 1 1
3dB 1 1 0 0 0 0 19dB 1 1 0 0 1 O 35dB 1 1 0 0 0 1 58dB 1 1 0 0 1 1
4dB 0 0 1 0 0 0 20dB 0 0 1 0 1 0 36dB 0 0 1 0 0 1 60dB 0 0 1 0 1 1
5dB 1 0 1 0 0 0 21dB 1 0 1 0 1 0 37dB 1 0 1 0 0 1 62dB 1 0 1 0 1 1
6dB 0 1 1 0 0 0 22dB 0 1 1 0 1 0 38dB 0 1 1 0 0 1 64dB 0 1 1 0 1 1
7dB 1 1 1 0 0 0 23dB 1 1 1 0 1 0 39dB 1 1 1 0 0 1 66dB 1 1 1 0 1 1
8dB 0 0 0 1 O 0 24dB 0 0 0 1 1 O 40dB O 0 0 1 0 1 68dB 0 O 0 1 1 1
9dB 1 0 0 1 0 0 25dB 1 0 0 1 1 0 41dB 1 0 0 1 0 1 70dB 1 0 0 1 1 1
10dB 0 1 0 1 0 0 26dB 0 1 0 1 1 0 42dB O 1 0 1 0 1 72dB 0 1 0 1 1 1
11dB 1 1 0 1 0 0 27dB 1 1 0 1 1 0 43dB 1 1 0 1 0 1 74dB 1 1 0 1 1 1
12dB O 0 1 1 0 0 28dB 0 0 1 1 1 0 44dB 0 O 1 1 0 1 76dB 0 0 1 1 1 1
13dB 1 0 1 1 0 0 29dB 1 0 1 1 1 0 46dB 1 0 1 1 0 1 78dB 1 0 1 1 1 1
14dB 0 1 1 1 0 0 30dB O 1 1 1 1 0 48dB 0 1 1 1 0 1 00dB 0 1 1 1 1 1
15dB 1 1 1 1 0 O 31dB 1 1 1 1 1 O 50dB 1 1 1 1 O 1
10 2001-06-19
TOSHIBA TC9421 F
5. Fader volume circuit
1) Equivalent circuit
FVR-IN F-OUT R-OUT
C) r 50k0(l:ont) , C)
. . . - . . . +
OdB 1 2 3 45 60 co
50kQ(Rear)
. . ' - . , . +
OdB 1 2 3 45 60 00 I
-0- (A-GND)
2) Fader volume setting
0 Front volume setting 0 Rear volume setting
D61 D62 D63 D64 D31 D82 D83 D84
VOLUME VALUE VOLUME VALUE
D71 D72 D73 D74 D91 D92 D93 D94
OdB 0 0 0 0 OdB 0 0 0 0
1dB 1 0 0 0 1dB 1 0 0 0
2dB 0 1 0 0 2dB 0 1 0 0
3dB 1 1 0 0 3dB 1 1 0 0
4dB 0 0 1 0 4dB 0 0 1 0
6dB 1 0 1 0 6dB 1 0 1 0
8dB 0 1 1 0 8dB 0 1 1 0
10dB 1 1 1 0 10dB 1 1 1 0
12dB 0 O 0 1 12dB 0 0 0 1
14dB 1 0 0 1 14dB 1 0 0 1
16dB 0 1 0 1 16dB 0 1 O 1
20dB 1 1 0 1 20dB 1 1 0 1
30dB 0 0 1 1 30dB 0 0 1 1
45dB 1 0 1 1 45dB 1 0 1 1
60dB 0 1 1 1 60dB 0 1 1 1
00dB 1 1 1 1 00dB 1 1 1 1
11 2001-06-19
TOSHIBA TC9421 F
MAXIMUM RATINGS (Ta = 25°C)
CHRACTERISTIC SYMBOL RATING UNIT
Supply Voltage VDD/VCC -0.3--15 V
Input Voltage VIN -thr-VDD/Vctrr0.3 V
Power Dissipation PD 300 mW
Operating Temperature Topr -40--85 °C
Storage Temperature Tstg -65-150 °C
ELECTRICAL SPECIFICATIONS (Unless otherwise specified, Ta =25°C, VDD =VCC=9.0V)
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
Operating Supply - 0
Voltage VDD/VCC Ta-- 40 85 C 6.0 9.0 12.0 V
Operating Supply I +1 1 No in ut no load 15 o 30 0 mA
Current CC DD p ' . .
"H" L I V 4.0 ' V
Input Voltage " " eve IH - CK, DATA, STB pins DD v
L Level VIL 0 -- 1.0
" n VDD--6.0-12V
I t C t H Level IIH VIH =VDD -1.0 ' 1.0 A
npu urren "L" Level IIL - lhL=0V - 1.0 ~ 1.0 '
RVR Main volume, LD=OFF 35 50 65
Volume Control
. RTO - Tone volume 35 50 65
Resistance k0
RFD Fader volume 35 50 65
Input Resistance RIN - lhl1--lbl4 input resistance 21 30 39
Setup Time tSET 1.0 - -
Data Hold Time HOLD 2 CK, DATA, STB signals 1.0 - - ,us
Input Pulse Width tW 1.0 - -
Operating Frequency fop CK signals - - 500 kHz
0 Input selector block
. f|N=1kHz, Gv=OdB
Maximum Input Level VINMAX THD=1%, RL=12kQ - 2.0 - Vrms
GV1 Gv=0dB -1.5 0 1.5
. GV2 - hN=1kHz Gv=6dB 4.5 6 7.5
Input Gain GV3 Rg=6000 GV=10dB 8.5 10 11.5 dB
GV4 GV=12dB 10.5 12 13.5
0 Main volume block
St R I ti ASTEP 0dB--44di? 0.5 1 1.5 dB
ep eso u lon - 44dB--78dB 1 2 3
Output Load Resistance RL VR-OUT pins 12 25 - kn
12 2001-06-19
TOSHIBA TC9421 F
0 Tone control block
CHARACTERISTIC SYMBOL CIR- TEST CONDITIONS MIN. TYP. MAX. UNIT
Control Range GVT Maximum boost/cut :10 $12 $15 dB
Step Resolution ASTEP - - 1 2 3
Output Load Resistance RL TONE-OUT pin 12 50 - kn
o Fader volume block
. OdB~4dB 0.5 1.0 1.5
Step Resolution ASTEP - 4dB--16di? 1 2 3 dB
Output Load Resistance RL F-OUT/R-OUT pins 12 33 - kft
0 Overall characteristics
VIN = 300mvrms -
Overall Harmonic THD (1) All set to flat le_1kHz - 0.005 0.01 (y
Distortion Ratio Rg =6000 o
THD (2) RL = 33m fIN = 20kHz - 0.008 0.02
VIN = 1Vrms, Rg = 6000
Crosstalk TC hN=1kHz, All set to flat 60 80 - dB
VIN =1Vrms, fIN =1kHz
Maximum Attenuation ATMAX 1 RL=33kQ\ 60 80 - dB
Main volume 00
Rg = 6000 (lHF-A)
VN (1) All set to flat - 5.0 12.0
Output Noise Voltage Rg=6000 (lHF-A) . PA/rms
V Bass/treble set to maximum 5 0 120
N (2) boost - .
Input amp set to +12dB
Test circuit 1 : Application circuit example used
Test circuit 2 : Serial data timing
(DOI) (D02) (D11) ' _________ C4)
DATA / X X g 2)( l
STB l t t -
tSET tw tHOLD tw
13 2001-06-19
TOSHIBA
APPLICATION CIRCUIT
TC9421 F
L-IN1 o J" ‘-+ t o R-IN1
47 F F
L-IN2 CL" __#+ JE'. 0 R-INZ
L-IN3 o " o LL" R-IN3
L-IN4 a o R-IN4
4.7 F 4 I I I I I I t 4.7 F 4
_ x " . .. r _ X
[A + + + + "
44 43 42 41 40 39 38 37 36 35 34
tsu.+ TI 33 'rs,
4t l3 31 g:
4 30 :1-T?
0.01/1F 0.01/1F
I 5 29
Ta-- I 6 TC9421 F 28 +
I I7 27 I01
1500pF
ff " 25
o I 10 24 u,
LL+ + d,
,3. I11 23 I , ts
/t r tr tr ' Il Il y, ' tr tr t m ..
.. .. HHI .. .. m
I I I I I I I I I I
L-F-OUT o I I I I I IL? C", R-F-OUT
4.7 Fx2 I I I I I I 4.7 Fx2
L-R-OUT CD I I I I I t 0 R-R-OUT
with no loudness control.
CK DATA STB +3;
I ts '
The circuit example shows the left channel with loudness control and the right channel
(Note) As the CK, DATA, and STB pins receive microcontroller communication digital signals,
take measures to prevent digital signals leaking to analog circuits, thus causing noise.
For example, use a ground pattern to guard the pins or use a shielded line.
2001 -06-1 9
TOSHIBA TC9421 F
PACKAGE DIMENSIONS
QFP44-P-1414-0.80D Unit : mm
18.9i0.3
14.0i0.2
3.0TYP
m tiiTululululu3t-
o-ie eo"
1 .352t0.2
Weight : 1.1g (Typ.)
15 2001-06-19
TOSHIBA TC9421 F
RESTRICTIONS ON PRODUCT USE
000707EBA
OTOSHIBA is continually working to improve the quality and reliability of its products.
Nevertheless, semiconductor devices in general can malfunction or fail due to their inherent
electrical sensitivity and vulnerability to physical stress. It is the responsibility of the buyer,
when utilizing TOSHIBA products, to comply with the standards of safety in making a safe
design for the entire system, and to avoid situations in which a malfunction or failure of such
TOSHIBA products could cause loss of human life, bodily injury or damage to property.
In developing your designs, please ensure that TOSHIBA products are used within specified
operating ranges as set forth in the most recent TOSHIBA products specifications. Also, please
keep in mind the precautions and conditions set forth in the "Handling Guide for
Semiconductor Devices," or "TOSHIBA Semiconductor Reliability Handbook" etc..
OThe TOSHIBA products listed in this document are intended for usage in general electronics
applications (computer, personal equipment, office equipment, measuring equipment, industrial
robotics, domestic appliances, etc.). These TOSHIBA products are neither intended nor
warranted for usage in equipment that requires extraordinarily high quality and/or reliability or
a malfunction or failure of which may cause loss of human life or bodily injury ("Unintended
Usage"). Unintended Usage include atomic energy control instruments, airplane or spaceship
instruments, transportation instruments, traffic signal instruments, combustion control
instruments, medical instruments, all types of safety devices, etc.. Unintended Usage of TOSHIBA
products listed in this document shall be made at the customer's own risk.
0 The products described in this document are subject to the foreign exchange and foreign trade
OThe information contained herein is presented only as a guide for the applications of our
products. No responsibility is assumed by TOSHIBA CORPORATION for any infringements of
intellectual property or other rights of the third parties which may result from its use. No
license is granted by implication or otherwise under any intellectual property or other rights of
TOSHIBA CORPORATION or others.
0 The information contained herein is subject to change without notice.
16 2001-06-19
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