TK15327 Ver la hoja de datos (PDF) - Toko America Inc
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TK15327 Datasheet PDF : 12 Pages
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TK15327
APPLICATION INFORMATION (CONT.)
OUTPUT TERMINAL VOLTAGE DIFFERENCE
This parameter is the output voltage difference between
Ach and Bch, and appears when the channel changes from
Ach to Bch, or changes to the reverse. Generally, this is
called Switching Noise or Pop Noise. If this value is big and
if this noise is amplified by the final amplifier and is
outputted by the speakers, then it appears as a Shock
Sound. Output terminal voltage difference of the TK15327M
is a value that adds the internal bias difference and the off-
set voltage difference. The value of the TK15327M is very
small; its maximum value is 13 mV. Toko can offer the
“Muting IC” if users wish to mute Switching Noise.
DIRECT TOUCH
The signal input terminals:
Internal circuits are operated by constant current circuit,
even if VCC or GND is contacted, damage does not occur.
The signal output terminal:
Outflow or inflow current is decided by ability of final
transistor, but protection circuit is not attached. If GND or
V are contacted damage may occur. Pay attention to
CC
long time contact. Do not supply over the maximum rating.
Referenced to GND, do not provide to all terminals over VCC
+0.3 V or -0.3 V.
DC SIGNAL INPUT
The output of the TK15327M has a saturation voltage (both
V and GND sides about 1.0 V); accordingly the use of a
CC
DC signal is not recommend (e.g., the pulse signal etc.)
NC TERMINAL
1ch-in
ab
c
d VCC
2ch-in
d
c
ba
11
10
327-1
9
8
7
1ch-out 1 2
11
10
327-2
9
8
7
control
34
2ch-out
Figure 15
KEY NO.
1
2
3
4
OUTPUT
c
H
L
L
L
a
L
H
L
L
b
L
L
H
L
d
L
L
L
H
NC terminals are not wired inside IC by bonding wire. NC
terminals are not tested so do not connect at outside.
FLOATING POSITION
When all is high level or low level, output is the floating.
Plural high level is prohibited.
TK15327 has floating position and can increase optional
channels. Figure 15 is an example to select one output
from four inputs, and the change operates by four controls.
This function is shown in the table below. If channels
increase more, control keys will increase with the same
number too. In this case the Decoder may be necessary.
Each device and channel has individual output voltage
values within a specification. When channels are in-
creased caution the output terminal voltage difference too.
June 1999 TOKO, Inc.
Page 11
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