[sdiy] Re: [sdiy] µP controlled analogue switches

[Theo]

Hi Florian,
Just some TTL latches like 74573 and some cheap analogue Cmos mux like 4051
or switch like 4066 will do nicely.
CD and HEF series Cmos can handle +15V signals or +/- 7,5V depending on how
you hook them up.
For data sheets try http://www.fairchildsemi.com/ or
http://www.semiconductors.philips.com/

Theo

------------------
----- Original Message -----
From: Fortner Florian <florian.fortner at fh-joanneum.at>
To: <synth-diy at node12b53.a2000.nl>
Sent: Wednesday, May 02, 2001 2:37 PM
Subject: [sdiy] µP controlled analogue switches


> Hi folks!
>
> I'm  a newbie in synthesizer design, so I wanted to start with the ASM-1
but
> with full MIDI-control. My biggest problem is the signal and cv routing,
for
> 4 asm-1 circuits I need 30-45 switches or muxes. Because of the limited
pin
> count on the µP (Atmel AVR) I have to multiplex the switches to reduce the
> pin count. Does anyone know if there are switches with built-in latch (to
> hold the state while the other switches are controlled) and capable of
> withstanding the high signal voltages and cv's? I only found some
> (expensive) parts from analog devices but all without latch. Or is there a
> better solution?