Finding replacement for legacy Motorola Gate chip

[rbrooks]

Hello all,

I've got a failed Motorola MC672P which reads as a Quad 2 Input NAND Gate http://pdf1.alldatasheet.com/datasheet-pdf/view/107787/ETC/MC672.html

Hard to find replacements except china and hong kong on ebay. Is there an easy way to find a newer IC that will perform the same task?

Thank you

 

[rbrooks]

The CD4011B seems to have the same functionality but a different pinout. http://www.mouser.com/ds/2/405/cd4011b-404423.pdf

Should I keep searching for a similar pinout or plan on adapting?

 

[rbrooks]

Then again the MC846P looks a lot more like a direct descendant. http://pdf1.alldatasheet.com/datasheet-pdf/view/130532/MOTOROLA/MC846.html

 

[AnalogKid]

MC666 - the level translator of the beast.

ak

 

[AnalogKid]

A 74AC00 has the right pinout, but runs on 5 V max. A 4011 will run on 3 to 18V, but has the wrong pinout. Neither has a 30 mA output stage. Is there any more information regarding the application circuit?

ak

 

[cjdelphi]

I'm amazed there's (yet) no way cloning logic chips... how it would work

1.. with some kind of jumper/dip, select your logic chip

2.. instruct the chip to be a logic chip via a command?

 

[Old Steve]

I'm amazed there's (yet) no way cloning logic chips... how it would work

1.. with some kind of jumper/dip, select your logic chip

2.. instruct the chip to be a logic chip via a command?

Programmable logic has been around for a long time, (PLDs). Unfortunately, though, there's no way to make the programmed chip pin-compatible with an equivalent fixed-logic chip.

rbrooks, why not just buy from China or Hong Kong?
A little expensive at $6 + delivery, but it'll get you up and running again.
http://www.ebay.com/itm/MOT-MC672P-...ED-CIRCUITS-/361225533453?hash=item541ab8380d

 

[cjdelphi]

Hence my point, pin compatibility... ideally an embedded RFID chip so no pins are used could be an option?

 

[Old Steve]

Hence my point, pin compatibility... ideally an embedded RFID chip so no pins are used could be an option?

It'd be nice, wouldn't it? Give it a few years and who knows......
I guess another option would be a few pins sticking out of the top for programming, that could be cut off afterwards.