Is TI’s Sitara AM3715 a Rebranded OMAP3630?

Posted by  06 September 2010

We recently got hold of TI’s Sitara AM3715, a 45 nm application processor with a 1 GHz ARM Cortex A8 core and a POWERVR SGX™ graphics accelerator, among other capabilities, but of course, so does the OMAP3630 (not coincidentally similar to Apple’s A4 chip from the Ipad and iPhone 4).


The Sitara range of processors is compatible with the OMAP3 architecture, but unlike OMAP's, doesn’t appear to be targeted at the mobile phone segment. The AM3703 and AM3715 (both are from the AM37x family) are “suitable for a wide variety of applications, such as portable data terminals, portable medical equipment, home and building automation, navigation systems, smart displays, human machine interaction (HMI) industrial interfaces, and other applications which demand require high performance, low power processing capabilities. The AM3715 offers a nearly 40 percent increase in ARM performance, double the 3D graphics performance, and lower power by up to 30% when compared to previous generations.”

Both have other parallel features, though described differently enough (and vaguely enough) to make it difficult to do a side-by-side feature comparison based on documentation. The thing that really triggered our supposition was the similarity of the mask marks on the two dies:

CW1

As you can see, the AM3715 has mask markings of F781773, and the OMAP has F781773A, although with different dates, 2009 and 2010 respectively. We don’t have a full die image of the OMAP3630, but we do have the 65 nm OMAP3530, and the layouts are definitely similar.

We would expect some layout differences, since the analog and digital parts of the chip scale differently, but the overall chip size has scaled – the AM3715 is half the size of the OMAP3530.

CW2

A different bonding pattern could account for functional differences in the packaged device. And using the same chip design for similar functionality in multiple market segments would certainly help keep costs down.

When we get the OMAP3630 we’ll know for sure!
Last modified on Monday, 06 September 2010 15:30