This part is a kind of semiconductor called 74247.

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

Manufacturers : National Semiconductor

Image and pinout :

Some of the text within the PDF file :

DM74LS247 BCD to 7-Segment Decoder Driver with Open-Collector Outputs DM74LS247 BCD to 7-Segment Decoder Driver with Open-Collector Outputs General Description The ’LS247 has active LOW open-collector outputs guaranteed to sink 24 mA It has the same electrial characteristics and pin connections as the ’LS47 The only difference is that the ’LS247 will light the top bar (segment a) for numeral 6 and the bottom bar (segment d) for number 9 For detailed description and specifications please refer to the ’LS47 data sheet Connection Diagram Logic Symbol Dual-In-Line Package May 1992 TL F 9822 – 1 Order Number DM74LS247M or DM74LS247N See NS Package Number M16A or N16E VCC e Pin 16 GND e Pin 8 Pin Names A0 – A3 RBI LT BI RBO a–g Description BCD Inputs Ripple Blanking Input [ ... ]

74247 PDF Datasheet Download