Homebrew PCBs

Allegro says they have replaced it with the 3967 and 3977. 

Have a look here: http://www.allegromicro.com/sf/3967/

They might even send you a sample. 

David

derekhawkins wrote:

>Look at the bottom of that page;
>
>UCN5804B pulls
>Famous stepper motor driver integrated circuit (spec sheet available 
>see our 93I002) these chips have been discontinued and are hard to 
>find. We lucked onto a pile of solder pulls and they are offered here 
>at a greatly reduced price. These trims have all been tested. Inquire 
>about 100 lot pricing.
>25I001 Unit Price : $3.50 
>
>  
>