# replacement for 7446?

#### iamapril

Joined Feb 8, 2012
12
Good day everyone. I have this project that uses a 7446 decoder. Unfortunately, all of the stores selling electronic parts here in our place don't have any stocks of it. What alternative decoder can I substitute for this?

#### bertus

Joined Apr 5, 2008
22,003
Hello,

Do you need the 30 Volts open collector output?

Rich (BB code):
7446			BCD to 7-segment display decoder/driver with 30 v open collector outputs
7447			BCD to 7-segment decoder/driver with 15 v open collector outputs
7448			BCD to 7-segment decoder/driver with Internal Pullups
7449			BCD to 7-segment decoder/driver with open collector outputs
You can also look for the LS types that are more available.

Bertus

#### iamapril

Joined Feb 8, 2012
12
can i use a 7447 decoder to an anode 7 segment display?

#### iamapril

Joined Feb 8, 2012
12
not necessarily. what was required to us was to use a decoder for an anode seven segment display. can i use 7447 instead of 7446?

#### bertus

Joined Apr 5, 2008
22,003
Hello,

The 7446 and 7447 are both open collector display drivers.

Bertus

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#### iamapril

Joined Feb 8, 2012
12
thanks! God bless

#### Wendy

Joined Mar 24, 2008
22,979
The CD4511 is very close pinout wise, and the datasheet shows how to use it both ways with external transistor drivers.

#### k7elp60

Joined Nov 4, 2008
562
Good day everyone. I have this project that uses a 7446 decoder. Unfortunately, all of the stores selling electronic parts here in our place don't have any stocks of it. What alternative decoder can I substitute for this?
Where are you located? I would be happy to send you some if you pay the postage, I have 7 in my stock.
Send me a PM if you like.

#### SgtWookie

Joined Jul 17, 2007
22,227
sn74246, sn74247, sn74LS248 are functionally identical to their respective 7446,7447, and 74LS48. Texas Insruments has stopped making the sn74246 and sn74247.

If your local suppliers don't have those either, you will need to order them from a supplier online.