The chip is made by ST so look on their website for datasheets and apps notes. http://www.st.com/content/ccc/resource/technical/document/datasheet/f9/35/6e/3f/48/18/48/51/CD00000063.pdf/files/CD00000063.pdf/jcr:content/translations/en.CD00000063.pdf http://www.st.com/content/ccc/resource/technical/document/application_note/0a/84/39/6c/ae/9a/42/0a/CD00003803.pdf/files/CD00003803.pdf/jcr:content/translations/en.CD00003803.pdf http://www.st.com/content/ccc/resource/technical/document/application_note/57/c8/7c/c1/0d/91/46/89/CD00003774.pdf/files/CD00003774.pdf/jcr:content/translations/en.CD00003774.pdf http://www.st.com/content/ccc/resource/technical/document/application_note/9d/a1/02/00/8a/6c/43/1e/CD00003771.pdf/files/CD00003771.pdf/jcr:content/translations/en.CD00003771.pdf

@andyfierman Thank you andy i try it with l297 and give of outpout of l293d to transistor array like amplifire i think its a best way for give high current and drive bipolar stepper motor wat u think about my idea

Depends on your motor drive current and voltage requirements. http://www.st.com/content/ccc/resource/technical/document/application_note/57/c8/7c/c1/0d/91/46/89/CD00003774.pdf/files/CD00003774.pdf/jcr:content/translations/en.CD00003774.pdf