eBay seller edgartech. They said they heard it could be a TI SN74AUC2G125 (most likely based on this http://www.digikey.com/product-detail/en/SN74AUC2G125YZPR/296-16800-1-ND/634960). This looks more like a power diode but I'm marking it TI since I have nothing better and it does say TI on the label.
SILICON WAFER - 4 Inch (100 mm) -- *MYSTERY* - ??? TI SN74AUC2G125 ??? - Qty:1 Mystery Texas Instruments 4" Wafer per photos We have been told this is (but not guaranteed) in some fashion: - TI SN74AUC2G125YZPR 296-16800-1-ND Tri-State Dual Bus Buffer Gate Some web info if correct IC... - www.ti.com/product/sn74auc2g125?CMP=AFC-conv_SF_SEP PDF - www.ti.com/lit/ds/symlink/sn74auc2g125.pdf In vacuum/heat-sealed packaging per photos
SLICE No. 32 WAFER TYPE TU155YQ LOT NUMBER 0185737 TI Part No 16800-1 GOOD QUANTITY 1205 UK ORIGIN