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.
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.
^ I think they made an error, according to the book the chip has 28 pins.
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