Download the TC4028BP datasheet PDF.
This datasheet also includes the TC4028 variant, as both parts are published together in a single manufacturer document.
TC4028BP/BF
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TC4028BP, TC4028BF
TC4028B BCD-to-Decimal Decoder TC4028B is a BCD-to-DECIMAL decoder which converts BCD signal into DECIMAL.