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TOSHIBA Bipolar Linear Integrated Circuit Silicon Monolithic
TA8194Z
Muting IC
The TA8194Z is a muting IC to prevent the “POP” noise made at
time of power on and off of audio equipments. This IC has 4
sensor terminals, muting control terminal and supply control
terminal. In case of sensing voltage rising, muting control signal
occurs and after that supply control signal occurs and muting
signal maintains for 1s. In case of sensing voltage setting, muting
control signal occurs and after that supply control signal stops.
This IC also has manual muting terminal and protection
function.
Features
· 4 sensor terminals: VCC, B1, B2, B3
· Muting circuit control signal output
· Power supply circuit control signal output
· Manual muting control terminal
· Protection function terminal
· Operating supply voltage range: V
CC (opr.)
= 8~18.0V (Ta = 25°C)
Weight: 0.99g (typ.)
TA8194Z
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Block Diagram
TA8194Z
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Terminal Explanation
Pin No. Function Equivalent Circuit
Mute out
3
Muting control signal output
VS out
4
Supply control signal output
TA8194Z
TC
(timing condenser)
5
Muting time condenser terminal
M.Mute
(manual mute)
6
V
≥ 0.8V→mute out = on
6
V
REF
(reference voltage)
7
Reference voltage for comparator
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Pin No. Function Equivalent Circuit
Prot.
(protection)
9
V
≥ 0.8V→mute out = on,
9
V
out = off
S
TA8194Z
10
11
12
13
B3
voltage sense terminal-3
B2
voltage sense terminal-2
B1
voltage sense terminal-1
VCC
Supply terminal voltage sense
terminal
CH
(charge hold)
14
Back up capacitor terminal at V
off
CC
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TA8194Z
Operating Description
The TA8194Z is a muting control IC to prevent pop noise made at time of power on and off of audio
equipments.
This IC has built-in 4 terminals for sensing bias line voltage of audio equipment.
According to sensing voltage rising and setting, this IC occurs muting control signal and supply control signal.
Followings are basic operation of this IC, refer to timing chart: Page 6.
(1) Muting control signal occurs at V
(2) Muting control signal occurs at V
(3) Muting control signal stops after (T
Muting time (T
(T
) is 1.0~1.1s (typ.) under condition of CTC = 10µF.
M ON
) depends on capacitor value connected to TC terminal: Pin(5).
M ON
The above are applied in case sensing voltage rises fast enough.
Muting control off sense voltage: (V
voltage rises slowly, the period sensing voltage rising from (V
(4) Muting control signal occurs at V
CH terminal: Pin(14). This capacitor is back-up capacitor at V
V
CC OFF
is by charge of this capacitor.
(5) Manual muting control terminal: Pin(6).
Muting control signal occurs by adding H-level signal at manual mute control terminal under any condition
of V
control output.
S
(6) V
(7) Sense voltage of V
control output signal occurs at condition of sensing terminal voltage is following.
S
V
･B1･(B2 + B3) = H-level
CC
S ON / OFF
and muting on / off control are set individually, so control signal output operate
sequentially as follows.
· Sensing voltage rising: V
S
(V
· Sensing voltage setting: Muting control signal stops after (T
(V
There are muting period before and after at VS control signal stops and occurs.
(8) Sense voltage of V
S ON / OFF
and muting on / off control have hysteresis voltage of 0.2~0.3V.
(9) Protection function terminal: Pin(9).
· Adding H-level control signal: V
· Adding L-level control signal from H-level: V
muting control signal stops.
DT
depends on capacitor value connected to TC terminal as T
P OFF
ON under any condition of B1, B2, B3 sensing voltage.
CC
output off.
S
) s at VS output on.
M ON
M OFF
CC OFF
) is higher than V
. In this case, muting time depends on capacitor value connected to
sense voltage (V
S ON
) to (V
VS ON
CC OFF
), so in case sensing
VS ON
) should be counted.
M ON
. Muting control signal operation at
control output signal stop after muting control signal occurs.
> V
M ON
) after VS control output occurs. (V
M OFF
control signal stops and muting control signal occurs.
S
VS OFF
)
) s at sensing voltage setting to
M ON
< V
VS ON
control signal occurs and after the period: DT
S
.
M ON
M OFF
)
P OFF
,
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Timing Chart
Maximum Ratings
TA8194Z
(Ta = 25°C)
Characteristic Symbol Rating Unit
Supply voltage VCC 25 V
Power dissipation PD 750 mW
Operating temperature T
Storage temperature T
-30~85 °C
opr
-55~150 °C
stg
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Electrical Characteristics
(unless otherwise specified, VCC = 14.4V, V
Test
Characteristic Symbol
Quiescent current I
Reference current I
Mute on sense voltage
Mute off sense voltage
Mute out saturation
voltage
Mute on dearly time DT
VS on mute time
VS on sense voltage
VS off sense voltage V
VS out voltage V
VS off dearly time DT
Protector on trigger
voltage
Protector on trigger time T
Protector on dearly time DT
Protector on input current I
Protector off delay time DT
Manual mute on sense
voltage
Manual mute on dearly
time
Manual mute on input
current
CCQ
REF
V
M ON (1)
V
M ON (2)
V
M OFF (1)
V
M OFF (2)
V
OUT ML
M ON
T
M ON (1)
T
M ON (2)
V
VS ON (1)
V
VS ON (2)
VS OFF
OUT VS
VS OFF
V
P ON
P ON
P ON
P IN
P OFF
V
MM ON
DT
MM ON
I
MM IN
Cir-
cuit
— — — 19 40 mA
— — 7.3 9.5 13.5 mA
— VCC, B2, B3 8.5 8.7 8.9
— B1 7.75 8.0 8.25
— VCC, B2, B3 — 9.0 9.2
— B1 — 8.2 9.2
— I
— — — — 10 µs
— B1 or B2 or B3→on 0.7 1.0 1.4
— VCC→on 0.8 1.1 1.5
— VCC — 7.4 8.1
— B1, B2, B3 — 7.3 8.1
— VCC, B1, B2 B3 7.3 7.6 8.0 V
— IVS = -20mA — 0.25 1.0 V
— — — — 10 µs
— — 0.8 — — V
— VP = 14.4V 10 — — µs
— VP = 14.4V — — 10 µs
— VP IN = 1V — — 0.1 mA
— — 0.7 — 1.5 s
— — 0.8 — — V
— VMM = 13.4V — — 10 µs
— V
Test Circuit
= 6.8V, Ta = 25°C)
REF
Test Condition Min. Typ. Max. Unit
= 10mA — 1.9 2.5 V
M OUT
= 1V — — 0.1 mA
MM IN
TA8194Z
V
V
s
V
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TA8194Z
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TA8194Z
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Package Dimensions
Weight: 0.99g (typ.)
TA8194Z
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TA8194Z
A
RESTRICTIONS ON PRODUCT USE
· TOSHIBA 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..
· The 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.
· The products described in this document are subject to the foreign exchange and foreign trade laws.
· The 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.
000707EB
· The information contained herein is subject to change without notice.
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