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TK15121
Grand Earthing System Audio Signal Mute IC FEATURES
s s s s s Wide Voltage Range (1.8 ~ 5.5 V) Very Low Signal Distortion (typ. 0.005%) High Maximum Input Voltage (max. 4.2 VP-P) Very Low Standby Current (typ. 0.1 mA) Minimal External Component Circuitry
APPLICATIONS
s s s s s Audio Systems Television VTR MD CD
DESCRIPTION
The TK15121M is a "MUTE IC" of the Grand Earthing System that was developed as a low frequency signal attenuation for audio products. The mute function includes two channels which act simultaneously by one control key. The optional time for the Attack/Release can be set up by the "Timing Control Capacitor".
20 P
TK15121
IN/OUT 1
VCC GND MUTE CAPACITOR
CONTROL IN/OUT 2
BLOCK DIAGRAM
DRIVER AMP
CONTROL LOGIC
ORDERING INFORMATION
TK15121M
Tape/Reel Code
TIME CONTROL
TAPE/REEL CODE
TL: Tape Left
April 1999 TOKO, Inc.
Page 1
TK15121
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC MAX) ....................................... 10 V Power Dissipation (Note 3) ................................ 200 mW Maximum Input Frequency (fMAX) ......................... 100 kHz Storage Temperature Range ................... -55 to +150 C Operating Temperature Range ...................-20 to +60 C
TK15121M ELECTRICAL CHARACTERISTICS
Test conditions: VCC = 3 V, TA = 25 C, f = 1 kHz, VIN = 4 VP-P unless otherwise specified.
SYMBOL VCC ICC OFF ICC ON ATT CION CIOFF SWVOFF SWVON VOSAT TH D GVA VIN MAX
PARAMETER Operating Voltage Supply Current Mute Off Current Supply Current Mute On Current Attenuation Mute On Charge Current Mute Off Discharge Current Mute Control SW Mute Off Voltage Mute Control SW Mute On Voltage Mute On Output Saturation Voltage Mute Off Total Harmonic Distortion Gai n Maximum Input Voltage
TEST CONDITIONS
MIN 1.8
TYP 3.0 0.1 5.0
MAX 5.5 0.2 8. 0
UNITS V mA mA -dB
RIN = 3 k , Note 1 Attack action. Note 2 Release action. Note 2
54
57 10 6.0 16 9.0 0.5 VCC + 0.3 1.4
A A V V mV
-0.3 1.0
f = ~20 kHz f = ~20 kHz THD = 0.01% -0.5
0.005 0
0.007 +0.5 4.2
% dB VP-P
Note 1: If a RIN other that 3 k is used, then the volume attenuation and attack/release time changes. Note 2: Attack is an action that changes to "mute on" from "mute off", and release is action that changes to "mute off" from "mute on". Standard capacity for the timing control is 0.22 F. Note 3: Power dissipation is 200 mW when mounted as recommended. Derate at 1.6 mW/C for operation above 25C.
Page 2
April 1999 TOKO, Inc.
TK15121
TEST CIRCUIT AND METHODS
3 K
A1 SG
THD
V _
V ~
V1
3 K
A2 SG
THD
V _
V ~
V2
METHODS 1) Power supply current. * Power supply current in the `MUTE OFF'. When the control is `Lo (or open)', measures the current `A1'. * Power supply current in the `MUTE ON'. When the control is'HI', measures the current `A1'. 2) Attenuation volume. * When the control is `Hi', attenuation is calculated by the following formula. ATT = 20Log
(
Pin 1(Pin 3) AC voltage at V1 = 3 V Pin 1(Pin 3) AC voltage at V1 = 0 V
)
3) Current of the charge and discharge to the Condenser Pin. * Current of the charge. When the control is `Hi' and the measurement is outflow current `A2' when the Pin 4 voltage is 0.3 V. * Current of the discharge. When the control is `Lo (or open)' and the measurement is inflow current `A2' when the Pin 4 voltage is 0.3 V. 4) Voltage of the control switch. * Voltage for the control `Hi'. The first elevates Pin 2 voltage gradually from 0 V and if its action becomes `MUTE ON' at the Pin 1 (Pin 3) output, t hen measures the voltage `V1'. * Voltage for the control `Lo'. The first lowers Pin 2 voltage gradually from VCC, and if its action becomes `MUTE OFF' at the Pin 1 (Pin 3) output, then measures the voltage `V1'. 5) Output DC voltage at the `MUTE ON'. When the control is `Hi', measures the Pin 1 (Pin 3) output voltage at non-input. 6) Total harmonic distortion. When the control is `Lo (or open)', measures the distortion of the Pin 1 (Pin 3) output. 7) Signal Voltage Gain When the control is `Lo (or open)', signal gain is calculated by the following formula. GV = 20Log
(
Pin 1(Pin 3) AC voltage Pin 1(Pin 3) AC voltage front 3K
)
Page 3
8) Maximum input signal voltage. When the control is `Lo (or open)', the first elevates input AC voltage of Pin 1 (Pin 3) gradually from 0 VP-P, and if the distortion became 0.01 % at the Pin 1 (Pin 3) output, the measure the AC voltage. April 1999 TOKO, Inc.
TK15121
TYPICAL PERFORMANCE CHARACTERISTICS
TA = 25 C, unless otherwise specified.
SUPPLY VOLTAGE VS. CURRENT 8 0.14
CURRENT (mA)
SUPPLY VOLTAGE VS. CURRENT Mute: off
CURRENT (mA)
FREQUENCY VS. TOTAL HARMONIC DISTORTION 1
Mute: on 6
0.1
THD (%)
0.12
4
0.10
0.01
2
0
0
2
3
4 VCC (V)
5
6
0
0
2
3
4 VCC (V)
5
6
0.001 0.01
0.1
1 f (kHz)
10
100
OUTPUT VOLTAGE VS. TOTAL HARMONIC DISTORTION 1
0
FREQUENCY VS. ATTENUATION VOLUME 0
MUTE RESISTANCE VS. ATTENUATION VOLUME
-20
-20
ATT (dB)
0.1
ATT (dB) THD (%)
-40
-40
0.01
-60 -60
0.001 0.01
0.1
1 VOUT (VP-P)
10
100
-80 0.01
0.1
1 f (kHz)
10
100
-80 0.01
0.1
1
10
100
RESISTANCE (k)
FREQUENCY VS. CROSS TALK -60 -70
CROSS TALK (dB)
8
TEMPERATURE VS. SUPPLY CURRENT Mute: on 6
3V 3K
-80 -90 -100 -110
~
4 VP-P
3K
V
ICC (mA)
I/O_1 I/O_2
4
~
2
Cross Talk Test Circuit
-120 0.01 0.1 1 f (kHz) 10 100
0 -40 -20 0 20 TA (C) 40 60 80
Page 4
April 1999 TOKO, Inc.
TK15121
TYPICAL PERFORMANCE CHARACTERISTICS (CONT.)
TA = 25 C, unless otherwise specified.
TEMPERATURE VS. CHARGE/DISCHARGE CURRENT 16 0.8
CURRENT (A)
TEMPERATURE VS. CONTROL THRESHOLD VOLTAGE
TEMPERATURE VS. ATTENUATION VOLUME -20
12 charge 8 discharge
ATT (dB)
VCONT (V)
-40
0.7
0.6
-60
4
0.5 -40
-20
0
20 TA (C)
40
60
80
0 -40
-20
0
20 TA (C)
40
60
80
-80 -40
-20
0
20 TA (C)
40
60
80
STANDARD APPLICATION
out1
3V
3K
in1 + 22
3K
in2 + 0.22 on
out2
off
April 1999 TOKO, Inc.
Page 5
TK15121
TERMINAL VOLTAGE AND EQUAL VALUE CIRCUIT
PIN NO. 1 3 SYMBOL 1in/out 2in/out DC VOLTAGE Floating/0V Floating/0V EQUAL VALUE CIRCUIT
VCC
EXPLANATION 1pin: in/output for 1ch. 3pin: in/output for 2ch.
1
3
2
Control
0V
VCC
Control Pin for the Mute on/off.
5K 2 30 K
4
Mute* C
0 V/ 0.6 V
VCC
Pin for timing capacitor for attack/release action.
100 K
4
Note 1 Ground pin.
5
GND
0V
5
6
VCC
1.8 ~ 5.5 V
6 VCC
Supply Voltage pin.
Note 1: Attack is an action that changes to `mute on' from `mute off', and release is an action that changes to `mute off' from `mute on'. Standard capacity for the timing control is 0.22 F. Page 6 April 1999 TOKO, Inc.
TK15121
TIMING-CHART AND ACTION TIME AT MUTE
Test conditions: VCC = 3 V, Timing Capacitor = 0.22 F The following values are typical characteristics, accordingly they are not guaranteed values. [Attack action start (mute on)] When the mute action was attacked, the charge current starts inflow, then the voltage at the pin for the capacitor rises up to 0.6 V. The rise time to 0.6 V is the following formula. T1 Capacity X 0.6 V Charge Current = 0.22 F X 0.6 V 10 A = 13.2 msec
The voltage of Pin 4 functions to 0.6 V by the upper limit circuit. In the estimate, when the pin of capacitor is 0.15 V and between 0.16 V, the attenuation value is about 90% in the final attenuation value. So it is the following calculation and timing chart. Control SW_on
0.6
Capacitor pin volt. (V)
T2
0.22 F X 0.16 V 10 A
_
0.22 F X 0.15 V 10 A
0.2 0.1
0.16 0.15
4 pin
= 0.22 msec This time is the attack time.
0
2
4
6 T1 T2
10 12
14 (ms)
Input
Output
[Release action start (mute off)] When the mute action was released, the discharge current starts outflow, then the voltage at the pin for the capacitor drops up to 10 mV. The drop time to 10 mV is the following formula. 0.22 F X 0.6 V Capacity X 0.6 V = T3 = 22 msec 6 A Disharge Current In the estimate, when the pin of the capacitor is 0.16 V and between 0.15 V, the attenuation value is restored about 90% against the input value. So it is the following calculation and timing chart. Control SW_off
0.6
Capacitor pin volt. (V)
T4
0.22 F X 0.16 V 6 A
_
0.22 F X 0.15 V 6 A
4 pin 0.2 0.1
0.16 0.15
= 0.37 msec This time is the release time.
0
10 T3 T4
15
20
(ms)
Output
April 1999 TOKO, Inc.
Page 7
TK15121
PACKAGE OUTLINE
Marking Information
TK15121M
0.6 6 5 4 Marking
SOT23L-6
121
1.0
1 e
2 e 0.95
3 0.32 0.95
+0.15 - 0.05
0.1
M
e 0.95
e 0.95
Recommended Mount Pad
3.5
+0.3 - 0.1
2.2 0.3
(3.4)
1.4 max
e1 3.0 1.2
+0.15 - 0.05
15 0 - 0.1 0.4
+ 0.3
0.1
0.15
3.3
Dimensions are shown in millimeters Tolerance: x.x = 0.2 mm (unless otherwise specified)
Toko America, Inc. Headquarters 1250 Feehanville Drive, Mount Prospect, Illinois 60056 Tel: (847) 297-0070 Fax: (847) 699-7864
TOKO AMERICA REGIONAL OFFICES
Midwest Regional Office Toko America, Inc. 1250 Feehanville Drive Mount Prospect, IL 60056 Tel: (847) 297-0070 Fax: (847) 699-7864 Western Regional Office Toko America, Inc. 2480 North First Street , Suite 260 San Jose, CA 95131 Tel: (408) 432-8281 Fax: (408) 943-9790 Eastern Regional Office Toko America, Inc. 107 Mill Plain Road Danbury, CT 06811 Tel: (203) 748-6871 Fax: (203) 797-1223 Semiconductor Technical Support Toko Design Center 4755 Forge Road Colorado Springs, CO 80907 Tel: (719) 528-2200 Fax: (719) 528-2375
Visit our Internet site at http://www.tokoam.com
The information furnished by TOKO, Inc. is believed to be accurate and reliable. However, TOKO reserves the right to make changes or improvements in the design, specification or manufacture of its products without further notice. TOKO does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. No license is granted by implication or otherwise under any patent or patent rights of TOKO, Inc.
Page 8
(c) 1999 Toko, Inc. All Rights Reserved IC-119-TK119xx 0798O0.0K
max
April 1999 TOKO, Inc.
Printed in the USA

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