hi
I have a problem with stk6713bmk3 I cant not find it &I try to
making its equivalent circuit .it is an unipolar fixed chopper-type
4-phase stepping motor drive hybrid ic which uses a mosfet power
device I getting the data sheet from www.datasheetarchive.com it has
this components list ( 4 mosfet transistor +2positive negative
opamp(is1458ok?)+4nor gate (what ic suggested)+8resistance I have not
it's value +2caps I havenot it's value too)
if this way is wrong what I can do ? is ther is an ic I can used it
as a replecement

I find the l297 is 4-phase stepping motor controller with adifferent
circuits diagram

This might help: http://www.onsemi.com/pub/Collateral/MC3479-D.PDF