Please help me with an equivalent Ic to LM3909 SN75374N
thanks

 

First, we start with what exactly those chips are. Datasheets attached.

Then we go to "Projects", second page, where I asked for exactly the same thing (for two different chips) 3 days ago, and got nothing for an answer. Apparently the answer is, "Not Frankly Likely", but you never know. There are some pretty smart denizens on this site.

 

SN75374 is an active part; TI's making them.
http://www.ti.com/product/sn75374
Arrow Electronics has them in stock:
http://components.arrow.com/part/detail/966500S7305525N7713
Mouser: http://www.mouser.com/ProductDetail...=sGAEpiMZZMvbYnN5EaJWBGMSBcrQTnKjT6fEbhBixck=
Avnet: http://avnetexpress.avnet.com/store...=500201&langId=-1&storeId=500201&listIndex=-1

Futurlec apparently has some LM3909's in stock:
http://www.futurlec.com
but their customer service is terrible, they charge your credit card right away, and your shipment might not arrive for months. Futurlec is not an authorized distributor for National, so I have sincere doubts if they are the "real thing".

The LM3909 was discontinued years ago.
Here is a discrete equivalent of an LM3909:
http://home.cogeco.ca/~rpaisley4/LM3909.html

Although you'd be better off to just use something like a CMOS 555 timer.

 

You have this chip http://www.nteinc.com/specs/800to899/pdf/nte876.pdf
It is sold by some according to this http://dilp.netcomponents.com/cgi-bin/nteinc.asp?partnumber1=NTE876
However I do not know anything about this chip. I have not used it my self. But I remember the LM3909 chip very well. Had some fun with it

 

Mouser has the NTE876 for $11.36:
http://www.mouser.com/ProductDetail/NTE/NTE876/?qs=2vx7X8LXn0Dej3Tpd%2b06gQ==
I don't blame Mouser for that price; I blame NTE.

 

Mouser has the NTE876 for $11.36:
http://www.mouser.com/ProductDetail/NTE/NTE876/?qs=2vx7X8LXn0Dej3Tpd%2b06gQ==
I don't blame Mouser for that price; I blame NTE.

Oh I did not go that deep into it. I think the Futurlec price was about $2.66 for the lm3909. $11.36 what a ripoff

 

From the other thread that you started:

I am a mechanic (for) medical equipment
Please help me with an equivalent Ic to SN75374N
its used (in) a portable ultra sound machine
this ic SN75374N used in a prob circuit board
this ic is (dead) (short circuit) it is not available in Pakistan
please suggest an equivalent IC
thanks
&
how (can) I find the equivalent electronics component?

This will be hard for us to do. We have no idea what might be available in Pakistan. Besides this, I do not know of another MOSFET gate driver that has the same exact function.

Can you order parts from Singapore or India?
Mouser in Singapore has SN75374N ICs available:
http://sg.mouser.com/ProductDetail/...=sGAEpiMZZMvbYnN5EaJWBGMSBcrQTnKjT6fEbhBixck=

 

You have to get this part at the supplier who has it. Or dig it out from some other equipment I am afraid.