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TC9235F-TC9235P
ELECTRONIC VOLUME
TOSHIBA TC9235P/F
TOSHIBA CMOS DIGITAL INTEGRATED CIRCUIT SILICON MONOLITHIC
TC9235F, TC9235F
ELECTRONIC VOLU M E
The TC9235F and TC9235F are an optimum CMOS IC TC9235P
which has been designed for electronization of volume
control of audio equipment, etc.
FEATURES
o Attenuation can be controlled from OdB to -78dB by up,
down input.
DlP16-p-300-2.54A
o This IC have 20dB tap for loudness circuit. TC9235F
0 This IC features a built-in DC output circuit (7 level) for
volume level meter.
It Polysilicon resistors enables low-distortion, high-
performance volume systems.
0 Volume level remains in backup mode with low current
consumption.
SOP16-P-300-1.27
0 Package is DIP16 and SOP16. Weight
DlP16-P-300-2.54A : 1.0g (Typ.)
SOP16-P-300-1.27 : 0.16g (Typ.)
PIN CONNECTION BLOCK DIAGRAM
Vss VDD
OUT-1 OUT-2
vss E 1 16 Iva, IN-l IN-2
OUT-1 t 2 15 Jour-a P
IN-I t 3 14 [IIN-z T -1 TM
TP-l I 4 13 ITP-it GND-1 GND-2
GND-1 t 5 12 [IGND-z
u-pt 6 11 IDC-OUT DECODER D-A
mu 7 10 um u-p UP/DOWN CONVERTER 11 DC-OUT
OSC t 8 9 Elm _ _
DN COUNTER l H
CONTROL
1 2001-06-19
TOSHIBA TC9235P/F
PIN FUNCTION
t','i',u. SYMBOL PIN NAME FUNCTION AND OPERATION NOTE
1 l/SS Negative power supply pin .
16 VDD Positive power supply pin Power supply terminal -
2 OUT-1 V I .
15 OUT-2 o ume output plns Volume circuit
3 IN-l
. . OUT
14 IN-it Volume input pms IN
4 TP-1 Tap output pins for w -
13 TP-2 loudness GND
5 GND-I An I nd in
12 GND-2 aog grou pl s
-- . . Volume up, down control input pin.
P v I .
6 U o ume up input pm The 1 step/1 push volume IS controlled by Built-in
pushing the Up or Down key. If the key pull-up
- . resistor
7 DN Volume down input pin has heen pushed continuously, the I
continuous volume control.
Oscillation pin.
8 OSC Oscillation pin Oscillator circuit consist of OR connection. -
Oscillation is executed while key is pushed.
. . . . . Built-in
- . . . . . Input pm for setting initial volume level
9 INT Initializing pm volume level set to 46dB by "L" input. 'u.l-yp
resistor
Back up mode input pin.
10 fN7f Inhibit terminal 1nterna| all operation IS stopp.ed by. L -
input, and volume level remains with low
current consumption.
. DC output pin for volume level meter.
D f I I
11 DC-OUT 'ded,","'"" pm or eve DC voltage which is corresponded to -
volume step is generated.
2 2001-06-19
TOSHIBA TC9235P/F
OPERATION
1. Volume circuit
Volume circuit consist of ladder resistor and analog switch.
Tap for loudness is connected to step 10 (20dB).
Attenuation is as follows when resistor (3.9km is connected between TP pin and GND pin.
0 Equivalence circuit 0 Volume step and attenuation
(Attenuation is as follows when resistor (3.9kf1) is
OUT 0— connected between TP pin and GND pin.)
IN C r 'til so STEP ATTENUATION STEP ATTENUATION
"il-itil-. SI 0 0 (dB) 16 32 (dB)
ir' 1 2 17 34
i -52 2 4 18 36
28.5k0 " 3 6 19 38
I l . : 4 8 20 40
i l ' l 5 IO 21 42
i . S9 6 12 46
' 7 14 23 50
w C) k, _ [i',5:l su, 8 16 24 54
f" r, 9 18 25 58
i: '511 10 20 26 62
f I , 11 22 27 66
20.25kQ " l l ,' l 12 24 28 70
I ' 13 26 29 74
-S30 14 28 30 78
L. 15 30 31 oo
GND $31
* Step 22 (46dB) initial value.
3 2001-06-19
TOSHIBA TC9235P/F
2. Volume up, down control circuit
Volume up, down control is executed by "OTS, DTil" key input.
It The 1 step/1 push volume is controlled by "L" level of W, W key.
0 If W, W key is input "L" continuously, volume level is changed continuously.
0 Timing of key input
Wr/ D-N INPUT
VOLUMELEVEL x X x x x
-i, i-- T —-| a i-
(fosc=20H2)
t : Prevent time for chattering Att 2.2x1/fosc(xs110ms)
T : Switching time to automatic mode ~ 10x1 /fosc (~500ms)
a : Up, Down speed 5: 2x1/fosc (~100ms)
fosc==CX-RX (Hz) : Rx--12--220kn
3. DC output circuit for volume level
DC output for volume level meter is internally connected to D-A converter (R/2R type).
8 stage output voltage which is corresponded to volume level is generated.
Because output impedance --es22kn (typ.) is high, If input impedance of next setting level meter IC
is low, set to Buffer.
o Equivalence circuit 0 Volume step and Output voltage
2R DC-OUT STEP ATTE'ldh"ON OUTPUT(\>/)OLTAGE
2R R o-- 3 o-- 6 7/8 VDD
R 4-- 7 8~14 6/8 VDD
2R 8--ll 16--22 5/8 VDD
R 12--15 24-30 4/8 VDD
16--19 32--38 3/8 VDD
Rxr22kn 20--23 40--50 2/8 VDD
24~27 54--66 1/8 VDD
28~31 70~OO 0
4 2001-06-19
TOSHIBA TC9235P/F
4. Initialization and Backup operation
(1) Initialization operation
When power on, volume level is set to initial value (46dB) by setting W pin to "L" level for
a while.
" --------------------
VIL ’/
- t t>lms
Adjust condenser value which is set TFit" pin to the period while "rfil"t" pin is "L" level is longer
than 1ms when power on.
(2) Backup operation
Internal operation is all stopped when "IN-fri pin is "L" level, and prohibit input and output.
Volume data is remains while Backup mode with low current consumption.
I 2V ._F_....._.F. I - VDDMIN; 2.0V
I I l Minimum Voltage for Back up is 2.0V.
I - I Back up data is lost
I I H ,
0V - -------------------- -f,
NORMAL MODE BACKUP MODE I NORMAL MODE
5 2001-06-19
TOSHIBA TC9235P/F
MAXIMUM RATINGS (Ta=25°C)
CHARACTERISTIC SYMBOL RATING UNIT
Supply Voltage VDD -0.r-15 V
Input Voltage VIN -0.3--1/DD+0.3 V
Power Dissipation PD 300 mW
Operating Temperature Topr -40--85 "C
Storage Temperature tstg - 55--150 °C
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, Ta =25°C, VDD=9V)
CHARACTERISTIC SYMBOL CIR- TEST CONDITION MIN. TYP. MAX. UNIT
Operating Supply - -- o
Voltage VDD - Ta-- 40 85 C 4.5 9.0 12 V
Operating Supply -
Current IDD 1 No load, fosc=20Hz - 0.3 1.0 mA
Backup Voltage VQD - IN-H-- "L'' 2.0 -%.. 12 V
Backup Current IQD 1 - - 0.01 1.0 pA
In t "H" Level VIH "Re, -- VDD
Vjicjage - All input pin . VDD V
L Level VIL 0 -- X 0.3
Input "H" Level IIH -.... . VIH =VDD -1 - 1
Current "L'' Level IIL - INH input pm lhL=0V -1 - 1 “A
Pull Up Resistor RUp - W, W, wr input pin 23 47 71 kn
Volume Resistor RVR - Between lhl-9GND resistor 31 44 58 k0
Analog Switch ON . .
Resistor RON - Analog switch ON resistor - 500 800 n
Attenuation Error AATT - - - 0 i 2.0 dB
Balance Between Left Volume resistor error between
- - + o
And Right ARVR left and right 0 LF3.0 Yo
Total Harmonic 0
Maximum Attenuation ATTMAX 1 VIN =1Vrms oodB - 100 - dB
RL=100kQ
Cross Talk CT R =600f) 0dB - 100 - dB
Output Noise Voltage VN g- - 2.0 - PVrms
OSC Frequency fOSC Cx=2.2,uF, RX=33kQ - 20 - Hz
6 2001-06-19
TOSHIBA TC9235P/F
TEST CIRCUIT 1
6000 3
"e? t 4
(1 l2 VDD) -,-'-o 6
Rx I Cx
THD - Vout LD CHARACTERISTIC
fin =1kHz, Rg = 6000,
RL=100kQ, HPF= 20Hz
LPF=80kHz
10 100 1000 10000 100000
fin (Hz)
(hill (hl 1 1O
Vout (Vrms)
7 2001-06-19
TOSHIBA TC9235P/F
EXAMPLE OF APPLICATION CIRCUIT
L-ch I
UP Key
_|_ - - 4.7k0
DOWN Key --0 t-r-l DN INH [I w
'W OSC m
LEFT SIDE RIGHT SIDE
LEVEL METER
DRIVER IC
(Note) Loudness circuit is left side, only volume (without loudness) circuit is right side.
C1=1500pF C2=0.1PF R=8.2kQ
2001 -06-1 9
TOSHIBA TC9235P/F
PACKAGE DIMENSIONS
DIP16-P-300-2.54A Unit : mm
[-1r'-'e1r-nF'--'1i-1l-1ei'-1
6.4:t0.2
V'-''-''''-'''-''
19.75MAX
19.25i0.2
03:51:01
0.735TYP . . i l 0.5i0.1_30'25 (ii)
Weight : 1.0g (Typ.)
9 2001-06-19
TOSHIBA
PACKAGE DIMENS
SOP16-P-300-
HHHHHHHH "
5 31:0 2
7.8i0.3
0.705TYP
10.8MAX
10.3:t0.2
tllllildtlleili,
l1 9MAX
Weight : 0.169 (Typ.)
o 15:02
tiitir'
TC9235P/F
Unit : mm
(3 00 mil)
0.15”-1
0.8i0.2
2001 -06-1 9
TOSHIBA TC9235P/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.
11 2001-06-19
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