Cool part. 20V enhancement N-ch MOSFET.
Vgs.th(100uA)
Cool part. 20V enhancement N-ch MOSFET.
Vgs.th(100uA)
Nice- worth having some on hand just for the low voltage drive. 5.3 ohms Rds(on) with 1.8V drive.
Thanks!
Yes, very nice. Only $0.18 at Digi-Key. But what is that package, damn it's small!
-- Thanks, - Win
That series gate resistor may trash the speed. The data sheet suggests that it does.
I've made a pulser that uses two 2N7002s in parallel to drive a 1:1 transmission line transformer. It will make a 50 volt pulse into 50 ohms with rise/fall times below 2 ns. You've just got to drive the gates hard.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
I was thinking it's faster for nano-power one-cell stuff, where picofarads matter. I realize my subject line wasn't specific enough.
I found the FET looking for a realllyyyy low-voltage part for low-voltage fun, but, after our thread on the 2n7002, I thought it was also nifty to see built-in ESD protection.
I had a customer kill some BSS138s on a board's internal nodes last year, mishandling. ZAP! Who expects electro-static discharge there? But, the boards died, and a protected FET would not have failed.
Nice trick.
Cheers, James Arthur
Yes, Rohm does that a lot. Fortunately, with SMD it's just a footprint.
I like the idea of .8v logic, oscillators, (noisy) amplifiers, etc.
Cheers, James Arthur
"Fast" begins at 1 ns. "Really fast" at 100 ps.
Having grown up in New Orleans, and living in San Francisco, I tend to forget that some places have ESD.
Most mosfets will switch a lot faster than their data sheets imply.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Sure. Here's a beefier, 50V part, ESD-protected, Vth
Nice to see some options that trade off higher Rds(on) for input capacitance, but still have modern low Vgs(th) in the 1V range.
Last time I needed one, all I could find readily was the little guys that can switch amperes at low voltage but have high gate capacitance.
--sp
Also, isn't the resistor in the wrong place? Like external gate pin, resistor, zener? That way there is less chance of frapping the protecton zener.
That's a fairly standard size - still within range of Press-n-Peel Blue and a cheap laser printer for hobbyists.
After years of building bulky, hot, expensive, fragile boards from Radio Shack and Electronics Plus, I like the idea of fitting a 50W switching power supply onto a 1" square board.
-- I will not see posts from astraweb, theremailer, dizum, or google because they host Usenet flooders.
On a sunny day (Wed, 15 Apr 2015 14:58:10 -0700) it happened John Larkin wrote in :
Walk a mile in my shoes....
I draw 1 inch sparks in the supermarket, to the point that it hurts. Did not crash the cash register yet.
I once designed the data network for a large supermarket chain, zeners everywhere.
The real reason for those ESD-safe wooden shoes?
Best regards, Spehro Pefhany
-- "it's the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com
On a sunny day (Thu, 16 Apr 2015 08:25:59 -0400) it happened Spehro Pefhany wrote in :
I dunno, something the soles are made of..
He's Dutch?
Yea, that was the trend for MOSFETs anyways, but the newer devices have lower gate capacitances.
Cheers
I always thought that electronic assembly should be done by naked girls sitting in tubs of tepid water.
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Yes. But the resistor itself might get vaporized or punched through by an ESD pulse. So, why have the resistor at all?
-- John Larkin Highland Technology, Inc picosecond timing precision measurement jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
Nononononono. Girls in hot tubs are far more dangerous than mere lightning. Ask anyone, especially wives. ;)
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net
The 2N7002 still looks good for a lot of uses.
-- John Larkin Highland Technology, Inc picosecond timing laser drivers and controllers jlarkin att highlandtechnology dott com http://www.highlandtechnology.com
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