Question-and-Answer Session
Operator
(Operator Instructions) Our first question comes from Tore Svanberg. Your line is open.
Tore Svanberg - Thomas Weisel Partners
Yes. Thank you. I was just wondering if you could add a little bit of comment on your visibility. Obviously, you're doing quite well here compared to your peers, but could you just talk a little bit about your visibility as far as backlog and maybe current booking from that business concerned?
Necip Sayiner
So in the guidance we provided for the business for 4Q follows the same principles we always have in terms of considering the amount of backlog and a bottoms up forecast from our sales team. We haven't applied any additional judgment to our guidance other than the usual conservatism that we usually attach to our revenue guidance fourth quarter.
Tore Svanberg - Thomas Weisel Partners
Sounds good and as a follow-up re the microcontroller business it seems like you are expecting that to be a little bit more moderate next couple of quarters. Is that really because of the economy or were there any key customers or key programs there that have already ramped and are now slowing down?
Necip Sayiner
In the third quarter we had a couple of specific events with some factory shutdowns in China and some inventories being worked out again in China with a couple of customers, and some of the design wins we have had ramping more slowly than we had anticipated. But beyond those specific events, I also believe that there is a softness in overall demand that we are seeing, which we are accounting with some of the new product cycles and new customers. But I believe for the next few quarters, until the macro environment improves, the growth rate for the MCU business will not be sustained at the 30 plus percent range we've enjoyed.
Tore Svanberg - Thomas Weisel Partners
Great, thank you and congratulations on the results.
Necip Sayiner
Thank you, Tore.
Operator
Next question comes from Craig Ellis. Your line is open.
Craig Ellis - Citigroup
I go by many names. Thanks for taking the question, guys. Bill, I'm wondering if you can clarify what the contribution was from Integration Associates in the current quarter and if you can just give us a glimpse into what it would be in the fourth quarter guidance?
Bill Bock
We had indicated that IA would contribute about $6 million to third quarter revenue over a two month time period and in fact they were slightly favorable to that outcome. For the fourth quarter, we will have full three months of the acquisition included in the consolidated results. So revenues will increase, although the IA business is being affected by the slowdown in the economy, essentially the same way everything else is, so perhaps a little bit less than our original expectations for Q4.
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