74240

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Dual 4-bit 3-state inverting buffer/line driver

     +---+--+---+
/1OE |1  +--+ 20| VCC
 1A1 |2       19| /2OE
/2Y4 |3       18| /1Y1
 1A2 |4       17| 2A4
/2Y3 |5  74   16| /1Y2
 1A3 |6  240  15| 2A3
/2Y2 |7       14| /1Y3
 1A4 |8       13| 2A2
/2Y1 |9       12| /1Y4
 GND |10      11| 2A1
     +----------+