TK15329 TOKO, TK15329 Datasheet - Page 12

• Manufacturer Part Number: TK15329
• Description: Audio Analog Switch
• Manufacturer: TOKO

TK15329
Page 12
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 TK15329M
is a value that adds the internal bias difference and the off-
set voltage difference. The off-set voltage difference is
very small, its typical value is 3 mV, but the input bias is
supplied from the outside.
So almost the output bias difference will be decided by the
supply bias difference. The TK15329M has a floating
position. Pay attention when operating as for the change
timing of the two keys. If the floating condition is long, then
the output voltage may fluctuate by R
may appear larger. 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 V
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
long time contact. Do not supply over the maximum rating.
Referenced to GND, do not provide to all terminals over V
+0.3 V or -0.3 V.
DC SIGNAL INPUT
The output of the TK15329M has a saturation voltage (both
V
DC signal is not recommend (e.g., the pulse signal etc.)
NC TERMINAL
NC terminals are not wired inside IC by bonding wire. NC
terminals are not tested so do not connect at outside.
CC
CC
and GND sides about 1.0 V); accordingly the use of a
are contacted damage may occur. Pay attention to
CC
or GND is contacted, damage does not occur.
APPLICATION INFORMATION (CONT.)
L
and the difference
CC
FLOATING POSITION
TK15329M 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.
creased caution the output terminal voltage difference too.
FUNCTION TABLE
When all is high level or low level, output is the floating.
Plural high level is prohibited.
OUTPUT
a
b
1ch-in
1ch-out
KEY NO.
c
a
b
d
c
1 2
d
V CC
H
L
L
L
1
Figure 15
control
327-2
327-1
H
2
L
L
L
When channels are in-
11
10
11
10
9
8
7
9
8
7
June 1999 TOKO, Inc.
3
d
4
3
H
L
L
L
2ch-in
2ch-out
c
b
4
L
L
L
H
a