Re: N-channel logic level (3.3V) MOSFETs?

John B wrote:
On 13/03/2007 Ken Smith wrote:

In article <et2vg6$ifg$1@xxxxxxxxxxxxxxx>, JeffC
<betchanz@xxxxxxxxxxx> wrote:
I need a logic level N-channel FET. It only need to handle 100mA
so something modest in, for example a T092 package would do, but it
does need to be fully 'on' by 3.3V at the gate.

(snip)

The data *** for the 2N7002 shows a Gate Threshold Voltage of 2.1V
typical and 2.5V maximum. That should work and you should be able to
get them just about anywhere.

A mosfet based to threshold voltage is not "fully on".

The 2N7000 biased with 3.3 volts may not pass 100 mA with the whole 3.3 volts across drain to source.

See Figures 1 and 2 on page 4 of the data ***:
http://www.fairchildsemi.com/ds/2N/2N7000.pdf

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