This part is a kind of semiconductor called H5TC4G63AFR-xxA.

Function of this product has 4Gb DDR3L SDRAM.

Manufacturers : SK Hynix

Image and pinout :

Some of the text within the PDF file :

4Gb DDR3L SDRAM 4Gb DDR3L SDRAM Lead-Free&Halogen-Free (RoHS Compliant) H5TC4G83AFR-xxA H5TC4G83AFR-xxI H5TC4G83AFR-xxL http:/// H5TC4G83AFR-xxJ H5TC4G63AFR-xxA H5TC4G63AFR-xxI H5TC4G63AFR-xxL H5TC4G63AFR-xxJ * SK Hynix reserves the right to change products or specifications without notice. Rev. 1.1 / Jan. 2013 1 Revision History Revision No. 1.0 1.1 History Official Version Release x8 IDD update Draft Date Oct. 2012 Jan. 2013 Remark http:/// Rev. 1.1 / Jan. 2013 2 Description The H5TC4G83AFR-xxA(I,L,J) and H5TC4G63AFR-xxA(I,L,J) are a 4Gb low power Double Data Rate III (DDR3L) Synchronous DRAM, ideally suited for the main memory applications which requires large memory density, high bandwidth and low power operation at 1.35V. SK Hynix DDR3L S [ ... ]

H5TC4G63AFR-xxA PDF Datasheet Download