The tbolt uses the DS1620S chip in the SOIC-8 package. The DIP package has quite a bit of thermal mass and would probably not work as well. The chip revision is the last two characters of the date code line (second line on the SOIC chips). I am looking for a rev D chip. ------------------ What package? I may have a '1620 sample in my junk box from back when they were still Dallas Semi. _________________________________________________________________ Windows Live™: Keep your life in sync. http://windowslive.com/explore?ocid=TXT_TAGLM_WL_t1_allup_explore_022009

At 12:00 PM 2/8/2009, Mark Sims wrote: >The tbolt uses the DS1620S chip in the SOIC-8 package. The DIP >package has quite a bit of thermal mass and would probably not work >as well. The chip revision is the last two characters of the date >code line (second line on the SOIC chips). I am looking for a rev D chip. I have a DS1620S (looks wider than an SOIC-8, I think it's 208 mil), date coded 9614C2. Any help? (I'm located in the US.) -- newell N5TNL