Post by thread:FET's as analog switch

>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

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.