MC74HC240A Octal 3-State Inverting Buffer/Line Driver/Line Receiver HighPerformance SiliconGate CMOS MC74HC240A PIN ASSIGNMENT LOGIC DIAGRAM ENABLE A 1 20 V CC 218 A1 YA1 A1 2 19 ENABLE B 4 16 YB4 3 18 YA1 A2 YA2 A2 4 17 B4 6 14 A3 YA3 YB3 5 16 YA2 A3 6 15 B3 8 12 A4 YA4 YB2 7 14 YA3 DATA INVERTING INPUTS OUTPUTS 11 9 A4 8 13 B2 B1 YB1 YB1 9 12 YA4 13 7 B2 YB2 GND 10 11 B1 15 5 B3 YB3 17 3 B4 YB4 FUNCTION TABLE Inputs Outputs Enable A, PIN 20 = V Enable B A, B YA, YB CC 1 PIN 10 = GND OUTPUT ENABLE A LL H 19 ENABLES ENABLE B LH L HX Z Z = high impedance ORDERING INFORMATION Device Package Shipping MC74HC240ANG PDIP20 18 Units / Box (Pb Free) MC74HC240ADWG SOIC20 WIDE 38 Units / Rail (Pb Free) MC74HC240ADWR2G SOIC20 WIDE 1000 Tape & Reel (Pb Free) MC74HC240ADTR2G TSSOP20* 2500 Tape & Reel MC74HC240AFG SOEIAJ20 40 Units / Rail (Pb Free) MC74HC240AFELG SOEIAJ20 2000 Tape & Reel (Pb Free) For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. *This package is inherently PbFree.