[sdiy] Using the VEE pin on a 405x Multiplexer

[Justin Owen]

-----Original Message-----
From: Harry Bissell [harrybissell at wowway.com]

> You are way over the 18V max rating. Watch out...
> (supplies fromV- to V+ should not exceed 18V max
> +/-7.5 would be more reasonable...
> or use a part that can take it (DG series..)

Hi Harry,

Would you mind clarifying/explaining this in a little more detail?

My supply (VDD & VSS) is +12V and 0V - so that's obviously within 18V.

The input signal is below 12V PP - +/- 5V-ish

Are we talking about the difference between VDD and VEE (which is 24V)? I should be keeping that to below 18V?

This kind of sounds like the bit of the data sheet I didn't quite understand - thus my question.

Thanks for your the info.

Justin