This part is a kind of semiconductor called HD74LS05.
Function of this product has (HD74LS04 / HD74LS05) Hex Inverters(with Open Collector Outputs).
Manufacturers : Hitachi Semiconductor
Image and pinout :

Some of the text within the PDF file :
HD74LS04 / HD74LS05 Hex Inverters / Hex Inverters (with Open Collector Outputs) REJ03D0391–0300 Rev.3.00 Jul.13.2005 Features • Ordering Information • HD74LS04 Part Name HD74LS04P Package Type DILP-14 pin SOP-14 pin (JEITA) SOP-14 pin (JEDEC) Package Code (Previous Code) PRDP0014AB-B (DP-14AV) PRSP0014DF-B (FP-14DAV) PRSP0014DE-A (FP-14DNV) Package Abbreviation P FP RP Taping Abbreviation (Quantity) EL (2,000 pcs/reel) EL (2,500 pcs/reel) HD74LS04FPEL HD74LS04RPEL • HD74LS05 Part Name HD74LS05P HD74LS05FPEL HD74LS05RPEL Package Type DILP-14 pin SOP-14 pin (JEITA) SOP-14 pin (JEDEC) Package Code (Previous Code) PRDP0014AB-B (DP-14AV) PRSP0014DF-B (FP-14DAV) PRSP0014DE-A (FP-14DNV) Package Abbreviation P FP RP Taping Abbreviation (Quantity) EL (2,00 [ ... ]
HD74LS05 PDF Datasheet Download
