From old datasheet system Quad 2-Input NOR Buffered B Series Gate • Quad 2-Input NOR Buffered B Series Gate . Quad 2-Input NAND Buffered B Series Gate 4000/14000/40000 SERIES, QUAD 2-INPUT NOR GATE, PDSO14 16-Bit Bus Transceiver And Register With 3-State Outputs 56-TSSOP -40 to 85 4000/14000/40000 SERIES, QUAD 2-INPUT NAND GATE, PDSO14