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'FET's as analog switch'
1998\12\20@234322 by Donald L Burdette

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>I was going to use a garden-variety 74HCT4066
>Quad Bi-Lateral Switch.  It is driven well by TTL-level inputs...
> ...which gives 25 ohms Ron at 4.5V.

>Any pointers to DIP/SIP-package switches with a lower Ron?

Michael -

I've never liked the 4066 series, as they have relatively high
on-resistance, though at 25 ohms they seem to have gotten better.  My
favorite for 5 Volt operation is the Analog Devices AD51x series.  Also
check out Maxim.  They're great with samples, though don't expect to
necessarily get production quantities with reasonable lead times.  And
Fairchild has single-gate parts available if you only need one or two.

Good Luck!


Don

1998\12\21@061347 by wwl

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On Sun, 20 Dec 1998 20:07:37 -0500, you wrote:

>>I was going to use a garden-variety 74HCT4066
>>Quad Bi-Lateral Switch.  It is driven well by TTL-level inputs...
>> ...which gives 25 ohms Ron at 4.5V.
>
>>Any pointers to DIP/SIP-package switches with a lower Ron?
>
Remember you can hook them in parallel - May be cheaper than using
more exotic devices.

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