This part is a kind of semiconductor called 74LS48.

Function of this product has BCD to 7-Segment Decoder.

Manufacturers : National Semiconductor

Image and pinout :

Some of the text within the PDF file :

DM74LS48 BCD to 7-Segment Decoder January 1992 DM74LS48 BCD to 7-Segment Decoder General Description The ’LS48 translates four lines of BCD (8421) input data into the 7-segment numeral code and provides seven corresponding outputs having pull-up resistors as opposed to totem pole pull-ups These outputs can serve as logic signals with a HIGH output corresponding to a lighted lamp segment or can provide a 1 3 mA base current to npn lamp driver transistors Auxiliary inputs provide lamp test blanking and cascadable zero-suppression functions The ’LS48 decodes the input data in the pattern indicated in the Truth Table and the segment identification illustration Connection Diagram Dual-In-Line Package TL F 10172 – 1 Order Number DM74LS48M or DM74LS48N See NS Package Number M16A or N16 [ ... ]

74LS48 PDF Datasheet Download