CMOS IC help!

Looking for help to find a replacement for the 4063b IC - I have a year 11
pupil who has built a circuit which requires this IC but so far the only
thing I can determine is that is either very hard to find or is plain
obsolete.

Any help would be appreciated as deadlines draw near.

TIA - befuddled electronics teacher

 

Maybe a 74HC85 would do?

 

Digi-Key has the TI CD4063BE 4-bit magnitude comparator IC, in 16-pin DIP
format, for $0.64 each in onesies. They've also got it in 16-pin SOP
for the same price.

Mouser has the same part, and also has an ST Microelectronics version
for a few pence less.

 

"btopenworld" suggests that you are in UK.

As you say, they are no longer in the RS or
Farnell catalogues.

I have a couple in stock (unused, but condition
unknown), which you can have if you email your
snailmail address.

 

If you get stuck....let me know and I will send you some samples from
our stock.

 

David pleaded:

Re the 4063B, it's widely available, and you can get it from ESR for 41p.

ESR are a great little firm. I've no connection with them, but use them
often as a customer.

This link will take you right to the 4063B:

http://www.users.zetnet.co.uk/esr/Semiconductors_ICs.PDF

An alternative supplier is Grandata - another helpful firm at:
http://www.grandata.co.uk

Best of luck with the project!

(David2)

 

74 or 74LS are most of the time NOT compatible

You must take : 74HCTxxx

 

74Cxx will be nearest to 4000 series, followed by 74HC then 74HCT.

In all cases there may be problems if the supply voltage is not 5V.

I think some 74C are okay with higher supply voltages but not AFAIK 74HC.

 

http://focus.ti.com/docs/prod/folders/print/cd4063b.html

Harold