Re: max. current through a 4066 switch

John Fields wrote: 
On 22 Oct 2005 11:05:32 -0700, Winfield Hill
<Winfield_member@xxxxxxxxxxx> wrote:


John Fields wrote...

Adam S wrote:


I cannot find the maximum switch current in any data *** of the 4000 or HC4000 CMOS analogue switches. I'm afraid I'll take the n or p MOSFET out of its ohmic region. I need to switch 10mA , and can afford up to about 1V drop. Can it be done with a 4066 (typ. Ron=80 ohm @ Vdd-Vee=12V) ?

If not how about the 74HC4066 (typ Ron=30 ohm @ Vdd-Vee=12V) ?
I want to avoid a relays if possible.


The data *** for the HC4066 at:
http://focus.ti.com/lit/ds/symlink/sn74hc4066.pdf
indicates that the absolute maximum supply voltage is 7V, so you're
screwed there, too.


He can use 74HC-series analog switches, if he switches to the
74hc4053 and its friends.  These can be powered from +/-7V, and
have 28-ohms typ, 80-ohms max at +/-6V according to ON Semi, and
45-ohms typ, 80-ohms max at +/-6V according to ST and Toshiba.


---
Yup.


Opps, I missed that part in the 4066 data***. I've only ever used the 405x analog switchs and overlooked the 4066 was missing a VEE pin to give it negative swings. Thanks. The 4053 is its closest friend.
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