U74HCT138

UNISONIC TECHNOLOGIES CO., LTD U74HCT138 3-TO-8 LINE DECODERS / DEMULTIPLEXERS „ DESCRIPTION CMOS IC The U74HCT138 decodes a three−bit Address to 1−of−8 active−low outputs. This device features three Chip Select inputs, two active−low and one active−high, to facilitate the demultiplexing, cascading and chip−selecting functions. The demultiplexing function is accomplished by using the Address inputs to select the desired device output. One of the Chip Selects is used as a data input while the other Chip Selects are held in their active states. „ FEATURES * Operate from 4.5V to 5.5V * Low Input Current:1.0uA Max * Low Power Consumption: 8μA Max * Typical tPD=15ns * Inputs are TTL voltage compatible „ ORDERING INFORMATION www.DataSheet.net/ Ordering Number Lead Free Halogen Free U74HCT138L-S16-R U74HCT138G-S16-R U74HCT138L-S16-T U74HCT138G-S16-T Package SOP-16 SOP-16 Packing Tape Reel Tube www.unisonic.com.tw Copyright © 2011 Unisonic Technologies Co., Ltd 1 of 5 QW-R502-642.A Datasheet pdf - http://www.DataSheet4U.co.kr/ U74HCT138 „ PIN CONFIGURATION A0 A1 A2 E1 E2 E3 Y7 GND 1 2 3 4 5 6 7 8 16 VCC 15 Y0 14 Y1 13 Y2 12 Y3 11 Y4 10 Y5 9 Y6 CMOS IC „ E1 FUNCTION TABLE OUTPUTS A1 A2 Y0 X X H X X H X X H L L L L L H H L H H L H L H H L H H H H H H H H L : Low voltage level INPUTS E3 A0 H X X X X H X X X X L X L L H L L L H H L L H L L L H H L L H L L L H H L L H L L L H H Note:H : High voltage level E2 Y1 Y2 Y3 H H H H H H L H H H H Y4 H H H H H H H L H H H ...