Moteur de recherche de fiches techniques de composants électroniques
  French  ▼
ALLDATASHEET.FR

X  

MC74ACT257D Fiches technique(PDF) 2 Page - ON Semiconductor

No de pièce MC74ACT257D
Description  Quad 2?묲nput Multiplexer with 3?뭆tate Outputs
Download  12 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricant  ONSEMI [ON Semiconductor]
Site Internet  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

MC74ACT257D Fiches technique(HTML) 2 Page - ON Semiconductor

  MC74ACT257D Datasheet HTML 1Page - ON Semiconductor MC74ACT257D Datasheet HTML 2Page - ON Semiconductor MC74ACT257D Datasheet HTML 3Page - ON Semiconductor MC74ACT257D Datasheet HTML 4Page - ON Semiconductor MC74ACT257D Datasheet HTML 5Page - ON Semiconductor MC74ACT257D Datasheet HTML 6Page - ON Semiconductor MC74ACT257D Datasheet HTML 7Page - ON Semiconductor MC74ACT257D Datasheet HTML 8Page - ON Semiconductor MC74ACT257D Datasheet HTML 9Page - ON Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 2 / 12 page
background image
MC74AC257, MC74ACT257
http://onsemi.com
2
PIN NAME
PIN
FUNCTION
S
Common Data Select Input
OE
3−State Output Enable Input
I0a−I0d
Data Inputs from Source 0
I1a−I1d
Data Inputs from Source 1
Za−Zd
3−State Multiplexer Outputs
TRUTH TABLE
Output
Enable
Select
Input
Data
Inputs
Outputs
OE
S
I0
I1
Z
H
X
X
X
Z
L
H
X
LL
L
H
X
HH
L
L
L
XL
L
L
H
X
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
Figure 2. Logic Symbol
S
OE I0a I1a I0b I1b
Zb
I0c I1c I0d I1d
Za
Zc
Zd
FUNCTIONAL DESCRIPTION
The MC74AC257/74ACT257 is a quad 2−input
multiplexer with 3−state outputs. It selects four bits of data
from two sources under control of a Common Data Select
input. When the Select input is LOW, the I0x inputs are
selected and when Select is HIGH, the I1x inputs are
selected. The data on the selected inputs appears at the
outputs in true (noninverted) form. The device is the logic
implementation of a 4−pole, 2−position switch where the
position of the switch is determined by the logic levels
supplied to the Select input. The logic equations for the
outputs are shown below:
Za = OE(I1aS+I0aS)
Zb = OE(I1bS+I0bS)
Zc = OE(I1cS+I0cS)
Zd = OE(I1dS+I0dS)
When the Output Enable input (OE) is HIGH, the outputs
are forced to a high impedance state. If the outputs are tied
together, all but one device must be in the high impedance
state to avoid high currents that would exceed the maximum
ratings. Designers should ensure the Output Enable signals
to 3−state devices whose outputs are tied together are
designed so there is no overlap.


Numéro de pièce similaire - MC74ACT257D

FabricantNo de pièceFiches techniqueDescription
logo
ON Semiconductor
MC74ACT257DG ONSEMI-MC74ACT257DG Datasheet
101Kb / 9P
   Quad 2-Input Multiplexer with 3-State Outputs
March, 2015 ??Rev. 8
MC74ACT257DR2G ONSEMI-MC74ACT257DR2G Datasheet
101Kb / 9P
   Quad 2-Input Multiplexer with 3-State Outputs
March, 2015 ??Rev. 8
MC74ACT257DTR2G ONSEMI-MC74ACT257DTR2G Datasheet
101Kb / 9P
   Quad 2-Input Multiplexer with 3-State Outputs
March, 2015 ??Rev. 8
More results

Description similaire - MC74ACT257D

FabricantNo de pièceFiches techniqueDescription
logo
ON Semiconductor
MC74AC253 ONSEMI-MC74AC253 Datasheet
182Kb / 11P
   Dual 4?묲nput Multiplexer with 3?뭆tate Outputs
March, 2006 ??Rev. 6
MC10H159 ONSEMI-MC10H159_06 Datasheet
155Kb / 7P
   Quad 2?묲nput Multiplexer
February, 2006 ??Rev. 7
MC74AC125 ONSEMI-MC74AC125_06 Datasheet
142Kb / 9P
   Quad Buffer with 3?뭆tate Outputs
October, 2006 ??Rev. 7
MC10H173 ONSEMI-MC10H173 Datasheet
156Kb / 5P
   Quad 2?묲nput Multiplexer/Latch
June, 2006 ??Rev. 7
MC10H158 ONSEMI-MC10H158_06 Datasheet
154Kb / 6P
   Quad 2?묲nput Multiplexer (Non?묲nverting)
February, 2006 ??Rev. 7
logo
Fairchild Semiconductor
74F258A FAIRCHILD-74F258A Datasheet
56Kb / 6P
   Quad 2-Input Multiplexer with 3-STATE Outputs
logo
Motorola, Inc
SN54LS257B MOTOROLA-SN54LS257B Datasheet
182Kb / 6P
   QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
logo
ON Semiconductor
MC74VHCT257A ONSEMI-MC74VHCT257A Datasheet
98Kb / 8P
   Quad 2-Channel Multiplexer with 3-State Outputs
April, 2001 ??Rev. 1
logo
Fairchild Semiconductor
74ACT258 FAIRCHILD-74ACT258_07 Datasheet
284Kb / 10P
   Quad 2-Input Multiplexer with 3-STATE Outputs
logo
ON Semiconductor
MC74VHCT257A ONSEMI-MC74VHCT257A_04 Datasheet
99Kb / 8P
   Quad 2-Channel Multiplexer with 3-State Outputs
September, 2004 ??Rev. 2
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12


Fiches technique Télécharger

Go To PDF Page


Lien URL




Politique de confidentialité
ALLDATASHEET.FR
ALLDATASHEET vous a-t-il été utile ?  [ DONATE ] 

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Echange de liens   |   Fabricants
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com