This part is a kind of semiconductor called MC14011B.

Function of this product has B-Suffix Series CMOS Gates.

Manufacturers : ON Semiconductor

Image and pinout :

Some of the text within the PDF file :

MC14001B Series B-Suffix Series CMOS Gates MC14001B, MC14011B, MC14023B, MC14025B, MC14071B, MC14073B, MC14081B, MC14082B The B Series logic gates are constructed with P and N channel enhancement mode devices in a single monolithic structure (Complementary MOS). Their primary use is where low power dissipation and/or high noise immunity is desired. http://onsemi.com MARKING DIAGRAMS 14 PDIP–14 P SUFFIX CASE 646 MC140XXBCP AWLYYWW 1 14 SOIC–14 D SUFFIX CASE 751A 1 14 TSSOP–14 DT SUFFIX CASE 948G 1 14 SOEIAJ–14 F SUFFIX CASE 965 1 XX = Specific Device Code A = Assembly Location WL or L = Wafer Lot YY or Y = Year WW or W = Work Week MC140XXB AWLYWW 14 0XXB ALYW 140XXB AWLYWW • Supply Voltage Range = 3.0 Vdc to 18 Vdc • All Outputs Buffered • Capable of Driving Two Low–power T [ ... ]

MC14011B PDF Datasheet Download