This part is a kind of semiconductor called 74LS145.

Function of this product has BCD-to-Decimal Decoders / Drivers(with 15V outputs).

Manufacturers : Hitachi Semiconductor

Image and pinout :

Some of the text within the PDF file :

19.20 20.00 Max 16 9 7.40 Max 6.30 Unit: mm 1 1.3 1.11 Max 8 0.51 Min 2.54 Min 5.06 Max 7.62 2.54 ± 0.25 0.48 ± 0.10 0.25 – 0.05 0° – 15° Hitachi Code JEDEC EIAJ Weight (reference value) + 0.13 DP-16 Conforms Conforms 1.07 g Unit: mm 10.06 10.5 Max 16 9 5.5 1 *0.22 ± 0.05 0.20 ± 0.04 8 0.80 Max 2.20 Max 0.20 7.80 + – 0.30 1.15 0° – 8° 0.70 ± 0.20 1.27 *0.42 ± 0.08 0.40 ± 0.06 0.12 M Hitachi Code JEDEC EIAJ Weight (reference value) FP-16DA — Conforms 0.24 g *Dimension including the plating thickness Base material dimension 0.10 ± 0.10 0.15 Unit: mm 9.9 10.3 Max 16 9 3.95 1 1.27 0.635 Max 8 0.11 0.14 + – 0.04 1.75 Max *0.22 ± 0.03 0.20 ± 0.03 0.10 6.10 + – 0.30 1.08 0° – 8° 0.67 0.60 + – 0.20 *0.42 ± 0.08 0.40 ± 0.06 0.15 0.25 M [ ... ]

74LS145 PDF Datasheet Download