4 input XOR gate - Electronic Circuits Projects Diagrams Free

fingers · 23rd May 2006, 10:30 PM

Hi,

Can anyone tell me a part number for a four input XOR gate - I can't find one. eg 74HC..

dknguyen · 23rd May 2006, 10:31 PM

Do a search on the Maxim or Texas Instrument website

hotwaterwizard · 26th May 2006, 03:01 AM

Wow hard one. You may have to make it.
Here are my search results

four input XOR gate
four input exclusive or
4-input XOR gate
4-input exclusive or
xor4
http://asic.austriamicrosystems.com/..._33/XOR40.html
http://asic.austriamicrosystems.com/..._33/XOR41.html

http://www.sfe-dcs.com/Digital/4I_4O_EOR.html
http://www.sfe-dcs.com/Images/Digital/4i_4o_eor.pdf

http://www.altium.com/files/learning...ry%20Guide.pdf

1134H 4-Input Exclusive-OR-Function Logic Gate General Micro-electronics Inc
http://www.americanmicrosemi.com/catalog/1134H.html

2134H 4-Input Exclusive-OR-Function Logic Gate General Micro-electronics Inc

PAL20X10a Programable Logic IC
http://www.tranzistoare.ro/datasheets2/12/1205394_1.pdf

http://asic.austriamicrosystems.com/..._33/XOR41.html
XOR41 is a 4-input EXCLUSIVE-OR (XOR) gate with 1x drive strength

hotwaterwizard · 26th May 2006, 04:44 AM

Here is how you make one.

FoulBreeze · 6th May 2007, 04:02 AM

1 - sn7486, 2 - sn7410's, & 1 - sn7408.
You'll have 1-XOR gate and 2-AND gates leftover; but hey, they're cheap!
Decimals: 7 (0111), 11 (1011), 13 (1101), & 14 (1110) are problematic-with cascaded 2-input XORs; and therefore requires the extra logic.

Leftyretro · 6th May 2007, 03:46 PM

I don't believe there is such a thing as a 4 input XOR function. An XOR function is by definition a 2 bit operation and while it can be performed on multibit variables (bytes, words, etc) it is still a bit by bit operation and any o 4 input bit gate function (with one bit output) will be some logic function other then a true XOR function ?

Lefty

FoulBreeze · 6th May 2007, 08:40 PM

True, it is, that XORs are two-bit operations, as in adders. Odd numbers of HI's in combination with a LO, in a cascaded XOR config, are always HI; and mathematically sound. I needed merely a circuit that wouldn't allow more than One of Four inputs to be HI, at a time--for Analog Multiplexer Addressing, and Idiot Proofing of illegal address modes. Not sure if that also is the configuration that "fingers" needed OR NOT.

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23rd May 2006, 10:30 PM	#1
fingers	4 input XOR gate Hi, Can anyone tell me a part number for a four input XOR gate - I can't find one. eg 74HC..

23rd May 2006, 10:31 PM	#2
dknguyen	Site Do a search on the Maxim or Texas Instrument website

26th May 2006, 03:01 AM	#3
hotwaterwizard	Wow hard one. You may have to make it. Here are my search results four input XOR gate four input exclusive or 4-input XOR gate 4-input exclusive or xor4 http://asic.austriamicrosystems.com/..._33/XOR40.html http://asic.austriamicrosystems.com/..._33/XOR41.html http://www.sfe-dcs.com/Digital/4I_4O_EOR.html http://www.sfe-dcs.com/Images/Digital/4i_4o_eor.pdf http://www.altium.com/files/learning...ry%20Guide.pdf 1134H 4-Input Exclusive-OR-Function Logic Gate General Micro-electronics Inc http://www.americanmicrosemi.com/catalog/1134H.html 2134H 4-Input Exclusive-OR-Function Logic Gate General Micro-electronics Inc PAL20X10a Programable Logic IC http://www.tranzistoare.ro/datasheets2/12/1205394_1.pdf http://asic.austriamicrosystems.com/..._33/XOR41.html XOR41 is a 4-input EXCLUSIVE-OR (XOR) gate with 1x drive strength __________________ John DeRosa (Hotwaterwizard) hotwaterwizard@aol.com Last edited by hotwaterwizard; 26th May 2006 at 04:42 AM.

26th May 2006, 04:44 AM	#4
hotwaterwizard	Here is how you make one. Attached Thumbnails __________________ John DeRosa (Hotwaterwizard) hotwaterwizard@aol.com

6th May 2007, 04:02 AM	#5
FoulBreeze	Another way 4-input XOR 1 - sn7486, 2 - sn7410's, & 1 - sn7408. You'll have 1-XOR gate and 2-AND gates leftover; but hey, they're cheap! Decimals: 7 (0111), 11 (1011), 13 (1101), & 14 (1110) are problematic-with cascaded 2-input XORs; and therefore requires the extra logic. Attached Thumbnails

6th May 2007, 03:46 PM	#6
Leftyretro	I don't believe there is such a thing as a 4 input XOR function. An XOR function is by definition a 2 bit operation and while it can be performed on multibit variables (bytes, words, etc) it is still a bit by bit operation and any o 4 input bit gate function (with one bit output) will be some logic function other then a true XOR function ? Lefty

6th May 2007, 08:40 PM	#7
FoulBreeze	True, it is, that XORs are two-bit operations, as in adders. Odd numbers of HI's in combination with a LO, in a cascaded XOR config, are always HI; and mathematically sound. I needed merely a circuit that wouldn't allow more than One of Four inputs to be HI, at a time--for Analog Multiplexer Addressing, and Idiot Proofing of illegal address modes. Not sure if that also is the configuration that "fingers" needed OR NOT.