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74238.md

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74238: 3-bit to 8-line decoder

  • Type: decoder
  • DIP: 16-pin
  • Input: 3-bit
  • Output: 8 lines

Description

This chip provides an 3-bit to eight line decoder.

Inputs and outputs

Label Description Signal
An encoded input active high
Yn output active high
OE1 output enable input 1 active low
OE2 output enable input 2 active low
OE3 output enable input 3 active high

Function table

OE1 OE2 OE3 A2 A1 A0 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
H X X X X X L L L L L L L L
X H X X X X L L L L L L L L
X X L X X X L L L L L L L L
L L H L L L L L L L L L L H
L L H L L H L L L L L L H L
L L H L H L L L L L L H L L
L L H L H H L L L L H L L L
L L H H L L L L L H L L L L
L L H H L H L L H L L L L L
L L H H H L L H L L L L L L
L L H H H H H L L L L L L L
  • H: HIGH voltage level
  • L: LOW voltage level
  • X: don't care

Pin layout

Datasheets