Texas Instruments LM339A General Purpose Differential ComparatorThe rectangular chip marked 61C7L4M LM339A G4 (top center) appears to be a Texas Instruments LM339A General Purpose Differential Comparator. I wasn't able to find any information on how the Apple TV uses this chip.
Photo by: Bill Detwiler / TechRepublic
Caption by: Bill Detwiler
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Bill Detwiler is Managing Editor of TechRepublic and Tech Pro Research and the host of Cracking Open, CNET and TechRepublic's popular online show. Prior to joining TechRepublic in 2000, Bill was an IT manager, database administrator, and desktop support specialist in the social research and energy industries. He has bachelor's and master's degrees from the University of Louisville, where he has also lectured on computer crime and crime prevention.