74HC138DR2G ON Semiconductor

74HC138 1of8 Decoder/ Demultiplexer HighPerformance SiliconGate CMOS The 74HC138 is identical in pinout to the LS138. The device inputs 74HC138 1 15 A0 Y0 ADDRESS 14 2 Y1 A1 A0 1 16 INPUTS V 13 CC Y2 3 12 2 15 A2 A1 Y0 ACTIVELOW Y3 11 OUTPUTS 3 14 Y1 Y4 A2 10 Y5 CS2 4 13 Y2 9 Y6 5 CS3 12 Y3 7 Y7 6 11 CS1 Y4 6 7 10 Y7 Y5 CS1 CHIP PIN 16 = V CC 4 GND 8 9 Y6 SELECT CS2 PIN 8 = GND INPUTS 5 CS3 Figure 1. Pin Assignment Figure 2. Logic Diagram FUNCTION TABLE Inputs Outputs CS1CS2 CS3 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X X H X X X HH HH HH HH X H X X X X HH HH HH HH L X X X X X HH HH HH HH H L L L L L L H HH HH HH H L L L L H H L HH HH HH H L L L H L HH L H HH HH H L L L H H HH H L HH HH H L L H L L HH HH L H HH H L L H L H HH HH H L HH H L L H H L HH HH HH L H H L L H H H HH HH HH H L H = high level (steady state) L = low level (steady state) X = dont care ORDERING INFORMATION Device Package Shipping 74HC138DR2G SOIC16 2500 / Tape & Reel (Pb Free) 74HC138DTR2G TSSOP16* 2500 / Tape & Reel 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 Pb Free.