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RC-999 I
SEMICONDUCTOR DATA
3) Fader block
e Timing of CK , DATA and ST inputs
When
D8 in the Fader control data is ''H'', analog
CK, DATA and ST shall be input with the following
switches AS2 and AS4 turn ON so that the fader VR at-
timing.
tenuates the front volume.
When
D8 is "'L"', analog switches AS1 and AS3 turns ON
so that the fader VR attenuates the rear volume.
DATABIT
14
2
3
14
15
16
ATT2-0UT
3/31
BUFFER
AMP
FADER-IN
6/28
a> 1.Opsec
b
b > 2.Opsec
8.13k
6.55k
6
.
e CK, DATA and ST inputs
5.10k
-8
The CK, DATA and ST inputs incorporate |ow-threshold
a
0
inverters so that they can operate at the TTL logic level of
-O9k
7
x
0 to 5V even when VDD = 12V is used.
3.25k
12
2.58k
14
Scape
12V
DATA
{
i
2.06k
~16
?
|
[0
CK
1.63k
~18
oH
>o
>O—
v
4.0V
ViH
1.29k
_20
ST
:
2.50k
O
| [>
[>o
1.0V
VIL
:
—26
L.
4
ov
—L: 4
1.61k
-35
oo?
e@ Power supply circuitry
mn
a
The TC9188F
normally uses one power source, but can
0.23k
6
also be powered from two power sources. Even in this case,
5
CK, DAT and ST can operate at the TTL Sogic level of 0 to
£ Analog SW
0.10k
FADER-GND
27
O
OUTPUT
Fo «
ATT2-OUT
R
«
FADER-VR
F
«
FADER-VR
R «
ATT2-OUT
28
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