ITT - Index of

I mm
SAH190
MaS TONE GENERATOR
- ~~----­
SEMICONDUCTORS
MOS TONE
GENERATOR
6
The SAH190 is a monolithic, MOC integrated,
special LSI circuit. Only three SAH190 circuits
are required to generate the twelve notes of the
highest octave in electronic organs. A twophase
clock generator, which is in practice the
master oscillator of the organ, is required for
driving the SAH190. This generator delivers a
frequency considerably higher than that of the
highest octave. The SAH190 generates four
tones, the frequency spacing of which corresponds
to an interval of three semitones by
dividing the clock frequency. By externally
switching the connection Option 1 these four
notes can be lowered as desired by a semitone
or by a whole tone so that the twelve master
oscillators required hitherto can be replaced by
three SAH190 units. By switching the connection
Option 11, the output frequencies of the
SAH190 can be modified by one octave. One
can therefore choose whether the tones generated
are to lie in the third octave or the
fourth octave above middle C, for instance.
The outputs A to D of the SAH190 are specifically
designed for directly driving the integrated
frequency divider SAJ110, see Fig. 3.
In addition, a further load with a resistance of
greater then 10kn can be conne·cted. The.output
signal has a square wave form with a
pulse duty factor of 0.5. The greatest deviation
of the twelve tones from the equal temperament
scale is ±0.03 0/00.
MAXIMUM RATINGS
v., V,
V3
14 , I,
10, I,
Ts
Clock voltages ....... -30 to +0.3V
Drain voltage ........ -30 to +0.3V
Output currents ............ - SmA
........................... -SmA
Storage temperature
range ............ -20 to +80°C
RECOMMENDED OPERATING CONDITIONS
V3
V" V,
ft
Drain voltage ... -17 (-15 to -19) V
Clock voltages .. -20 (-18 to -22) V
Clock .frequency ....... 1 to 1.5MHz
7
max.D,S ~
max.9,4~
Fig. 1-SAH190 in a TO-96 metal case =TO-S
with 10 terminals. Weight approx. 1 g.
Dimensions in mm
Terminals
1. Ground, 0, Substrate, case
2. Option II
3. Vdd
4. Output A
5. Output B
6. Output C
7. Output D
8. Clock pulse t2
9. Clock pulse t1
10. Option I
CHARACTERISTICS
rout
In
Output resistance ...........