Quote Originally Posted by milestag View Post
The ISD1700 chips are tempermental to say the least. I have it working fine in my project, but there are some undocumented problems with this chip. Overall the documentation is inconsistent/poor and difficult to find current versions. I found out after a year of using this chip that I had the outdated datasheets.
They are indeed temperamental. The timing information in the data sheets may be off by as much as 25%, and this is different from one device model to the next.

I've been working with one for the past 2 weeks . . .