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Topic: 2803 vs 2003 for Transistor Array (Read 624 times) previous topic - next topic

David Pankhurst

I have a board (a design of Ladyada's I believe) which uses a 2003 chip with 7 darlingtons to control a stepper motor

While looking around, I found a 2803 that seems quite similar internally (diff outside of course).

My question - could I create a board using the 2803 to replace the 2003? Or is there some internal detail I'm overlooking?

I'm asking because the 2803 has 8 darlingtons, which would let me control two stepper motors with one chip, instead of using two 2003s, and wasting 6 outputs.

David Pankhurst

Here are the two data sheets if they would be of help:

2803:
http://www.taydaelectronics.com/datasheets/A-067.pdf

2003:
http://www.taydaelectronics.com/datasheets/A-070.pdf

MarkT

If you look in the datasheets you'll see they are basically the same.   In fact the clue is in the part number   2803 and 2003 differ by an '8' - because its an 8-channel version - well that's likely to be the intention.

In the early days of ICs 18 pin packages didn't exist I believe, only 8,14,16,20,24,28,40 etc, hence the awkward restriction of the original chips to 7 channels.
[ I won't respond to messages, use the forum please ]

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