4 input OR gate

Y

yani07

New Member

• Sep 25, 2009

• #1

help!!

where can i find data sheet for a 4 input OR gate TTL family? tnx

 

K

KMoffett

Well-Known Member

• Sep 25, 2009

• #2

I don't recall there being one. Maybe a 7423 or 7425 dual 4-input NOR, and using the second gate as an inverter to get one 4-input OR.

Ken

 

ParkingLotLust

Member

• Sep 25, 2009

• #3

Ive seen ECL and CMOS 4-input OR's but no TTLs.

 

C

colin55

Well-Known Member

• Sep 26, 2009

• #4

Just use diodes

 

Grossel

Well-Known Member

• Sep 26, 2009

• #5

colin55 said:

Just use diodes

Click to expand...

If interface between circuits is open collector, then just four diodes won't help. If it was a AND gate, it would possible help.

Another possible issue is whenever input voltage vould become illegal (somewhere between 2 to 4 volts, if I remember correctly).

But it might work between two ttl intercaces, but this must be tested out.

 

ParkingLotLust

Member

• Sep 26, 2009

• #6

Worst case scenario, you could always use 3 2-input OR gates.

 

hotwaterwizard

Active Member

• Sep 26, 2009

• #7

74ACT11802 Datasheet
**broken link removed**

 

Last edited: Sep 26, 2009

ParkingLotLust

Member

• Sep 26, 2009

• #8

Nice find!

 

K

KMoffett

Well-Known Member

• Sep 26, 2009

• #9

Not sure where the OP is, but if this is for a real project...in the USA, Mouser was the only one that I could find that listed it, and they had "call" for price which usually means only large, special orders.

I feel like we are talking to ourselves. yani07, where are you?

Ken

 

C

colin55

Well-Known Member

• Sep 26, 2009

• #10

I feel like we are talking to ourselves. yani07, where are you?

Click to expand...

That's right; don't waste your time on these ignorant people.