7400 ttl series logic texas instruments sn7447n bcd to 7 segment decoder driver ic ttl family 7447 base number 475 to 525v supply voltage 100ns propagation delay 032w power 14 dip 0 to 70c sn7447n feature active low outputs designed for driving common anode leds or incandescent indicators directly texas instruments sn7447n bcd to 7 segment 15v