SN76488N sound effects generator IC?

M

Mad Scientist Jr

Guest
Does anyone know where to find a SN76488N IC? This is a 28-pin sound
effects generator chip used in some circuits in the book "33
Electronic Music Projects You Can Build" (Winston, Lawrence E., Tab
Books, 1981, ISBN 0-8306-1373-0) on p. 144-154.

From the book:
The SN76488N complex sound generator is an integrated circuit which
Click to expand...
combines both linear and digital circuitry. Shown in Fig. 7-26, this
IC lends itself very well to music applications. It will generate
special-effect noises, tones, and low frequency sounds. You can create
a wide variety of sounds using many different types of electronic
components. Projects using this can include home video games, toys,
alarms, and complex electronic musical instruments. It is available
from your local Radio Shack store for less than $7.00. This makes it a
very excellent buy. The SN76488N integrated circuit contains its own
internal audio amplifier circuit which will directly drive an 8-ohm
speaker through a 100 microfarad capacitor.

From some old newsgroup posts:
2) Texas Instruments
SN76488N
Singapore 8035A
26 Pin DIP
Again, you must ignore the SN prefix which is specific to TI.
^ I think they made an error, according to the book the chip has 28
Click to expand...
pins.

I'm going to start working on a sound generator for a locomotive
sometime soon, and I was wondering if any of you have used Radio
Shack SN76488N (part 276-1766) in a project and if it is still available?
Click to expand...
Is this chip obsolete? Are there any equivalents or replacements
currently available?

Thanks...

PS The pinout is diagrammed as follows:
1 One-Shot Output
2 VCO Output
3 Noise Clock Output
4 SLF Output
5 Noise Resistor
6 Noise Capacitor
7 Decay Resistor
8 Decay Capacitor
9 Inhibit
10 Audio Input
11 VReg 5-Volt Out
12 VCC
13 Audio Output
14 Ground
15 VCO External Control
16 VCO Capacitor
17 VCO Resistor
18 SLF Resistor
19 SLF Capacitor
20 VCO Select
21 One-Shot Capacitor
22 One-Shot Resistor
23 Mixer C Input
24 Mixer A Input
25 Mixer B Input
26 SLF Select
27 Envelope Select 2
28 Envelope Select 1
 
Mad Scientist Jr (usenet_daughter@yahoo.com) writes:

Is this chip obsolete? Are there any equivalents or replacements
currently available?

Of course it's obsolete, the book is from 1981 and all kinds of things
Click to expand...
have changed since then. The more specialized an IC the more likely
it will go obsolete.

It's not a generic IC, there is no way to use a "substitute", even if
they still existed, without major changes to the circuitry.

What you need to do is understand the circuit, and then start from
scratch to create the same results.

And cut out the cross-posting.

Michael
 
Try here;

http://www.1sourcecomponents.com/partinfo/sn76488.htm

They list several sources with available chips.

Good Luck,

- Tim -

In article <1185225911.263277.166450@d55g2000hsg.googlegroups.com>,
usenet_daughter@yahoo.com says...
Does anyone know where to find a SN76488N IC? This is a 28-pin sound
effects generator chip used in some circuits in the book "33
Electronic Music Projects You Can Build" (Winston, Lawrence E., Tab
Books, 1981, ISBN 0-8306-1373-0) on p. 144-154.

From the book:
The SN76488N complex sound generator is an integrated circuit which
combines both linear and digital circuitry. Shown in Fig. 7-26, this
IC lends itself very well to music applications. It will generate
special-effect noises, tones, and low frequency sounds. You can create
a wide variety of sounds using many different types of electronic
components. Projects using this can include home video games, toys,
alarms, and complex electronic musical instruments. It is available
from your local Radio Shack store for less than $7.00. This makes it a
very excellent buy. The SN76488N integrated circuit contains its own
internal audio amplifier circuit which will directly drive an 8-ohm
speaker through a 100 microfarad capacitor.

From some old newsgroup posts:
2) Texas Instruments
SN76488N
Singapore 8035A
26 Pin DIP
Again, you must ignore the SN prefix which is specific to TI.
^ I think they made an error, according to the book the chip has 28
pins.

I'm going to start working on a sound generator for a locomotive
sometime soon, and I was wondering if any of you have used Radio
Shack SN76488N (part 276-1766) in a project and if it is still available?

Is this chip obsolete? Are there any equivalents or replacements
currently available?

Thanks...

PS The pinout is diagrammed as follows:
1 One-Shot Output
2 VCO Output
3 Noise Clock Output
4 SLF Output
5 Noise Resistor
6 Noise Capacitor
7 Decay Resistor
8 Decay Capacitor
9 Inhibit
10 Audio Input
11 VReg 5-Volt Out
12 VCC
13 Audio Output
14 Ground
15 VCO External Control
16 VCO Capacitor
17 VCO Resistor
18 SLF Resistor
19 SLF Capacitor
20 VCO Select
21 One-Shot Capacitor
22 One-Shot Resistor
23 Mixer C Input
24 Mixer A Input
25 Mixer B Input
26 SLF Select
27 Envelope Select 2
28 Envelope Select 1
Click to expand...
--
Email - tempowl@nospam.nbnet.nb.ca (remove the nospam part)
 
Thank you for your reply.

Of course it's obsolete, the book is from 1981 and all kinds of things
have changed since then. The more specialized an IC the more likely
it will go obsolete.
Click to expand...
That's probably true, but it's worth looking into. You never know if a
component is still made.

And cut out the cross-posting.
Click to expand...
Why? I'm not abusing it. This thread was posted to
sci.electronics.components, alt.music.makers.electronic,
rec.music.makers.guitar
Since it concerns an electronics component, one used in electronic
music circuits, and guitar effects, it is relevant to all three.
Cross posting is not always rude - it has several advantages.
For more info see http://en.wikipedia.org/wiki/Cross-posting

Thanks again.

On Jul 23, 6:16 pm, et...@FreeNet.Carleton.CA (Michael Black) wrote:
Mad Scientist Jr (usenet_daugh...@yahoo.com) writes:

Is this chip obsolete? Are there any equivalents or replacements
currently available?

Of course it's obsolete, the book is from 1981 and all kinds of things
have changed since then. The more specialized an IC the more likely
it will go obsolete.

It's not a generic IC, there is no way to use a "substitute", even if
they still existed, without major changes to the circuitry.

What you need to do is understand the circuit, and then start from
scratch to create the same results.

And cut out the cross-posting.

Michael
Click to expand...
 
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