Patent ID: 8521952

Claim:
A concentrator device comprising: a front side port to couple to a processor and provide hierarchical storage to memory devices coupled to a backside port; and a Content Addressable Memory (CAM), the concentrator device is to cache data received from the backside port, the CAM to make a determination whether target contents are stored in a Phase-Change Memory (PCM) array separate from the CAM, the CAM being further configured to provide address locations in the PCM array where the target contents are stored, at least one CAM cell of the CAM having two PCM storage locations including a first PCM storage location and a second PCM storage location, one end of the first PCM storage location being coupled to a match line of the CAM and a gate of the first PCM storage location to receive a search data value as an input, one end of the second PCM storage location being coupled to the match line and a gate of the second PCM storage location to receive a complemented value of the search data value as a complemented input.