This part is a kind of semiconductor called D4001BC.

Function of this product has CD4001BC.

Manufacturers : National Semiconductor

Image and pinout :

Some of the text within the PDF file :

CD4001BM CD4001BC Quad 2-Input NOR Buffered B Series Gate CD4011BM CD4011BC Quad 2-Input NAND Buffered B Series Gate March 1988 CD4001BM CD4001BC Quad 2-Input NOR Buffered B Series Gate CD4011BM CD4011BC Quad 2-Input NAND Buffered B Series Gate General Description These quad gates are monolithic complementary MOS (CMOS) integrated circuits constructed with N- and P-channel enhancement mode transistors They have equal source and sink current capabilities and conform to standard B series output drive The devices also have buffered outputs which improve transfer characteristics by providing very high gain All inputs are protected against static discharge with diodes to VDD and VSS Features Y Y Y Y Low power TTL Fan out of 2 driving 74L compatibility or 1 driving 74LS [ ... ]

D4001BC PDF Datasheet Download