MC74ACT257 ON Semiconductor, MC74ACT257 Datasheet

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MC74ACT257

Manufacturer Part Number
MC74ACT257
Description
QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
Manufacturer
ON Semiconductor
Datasheet

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3–state outputs. Four bits of data from two sources can be selected
using a Common Data Select input. The four outputs present the
selected data in true (noninverted) form. The outputs may be switched
to a high impedance state by placing a logic HIGH on the common
Output Enable (OE) input, allowing the outputs to interface directly
with bus–oriented systems.
July, 2002 – Rev. 6
PIN NAME
TRUTH TABLE
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
PIN
S
OE
I
I
Z
Figure 1. Pinout: 16–Lead Packages Conductors
0a
1a
The MC74AC257/74ACT257 is a quad 2–input multiplexer with
a
Multiplexer Expansion by Tying Outputs Together
Noninverting 3–State Outputs
Outputs Source/Sink 24 mA
Semiconductor Components Industries, LLC, 2002
ACT257 Has TTL Compatible Inputs
–Z
–I
–I
Output
Enable
0d
1d
d
OE
H
L
L
L
L
FUNCTION
Common Data Select Input
3–State Output Enable Input
Data Inputs from Source 0
Data Inputs from Source 1
3–State Multiplexer Outputs
Select
Input
S
X
H
H
L
L
(Top View)
I
X
X
X
H
L
0
Inputs
Data
I
H
X
X
X
L
1
Outputs
Z
Z
H
H
L
L
1
MC74AC257N
MC74ACT257N
MC74AC257D
MC74ACT257D
MC74AC257DR2
MC74ACT257DR2
MC74AC257DT
MC74ACT257DT
MC74AC257DTR2
MC74ACT257DTR2 TSSOP–16
MC74ACT257M
MC74AC257MEL
MC74ACT257MEL
See general marking information in the device marking
section on page 7 of this data sheet.
16
DEVICE MARKING INFORMATION
Device
ORDERING INFORMATION
1
16
16
16
http://onsemi.com
1
1
1
TSSOP–16
TSSOP–16
TSSOP–16
SOIC–16
SOIC–16
Package
SOIC–16
SOIC–16
EIAJ–16
EIAJ–16
EIAJ–16
PDIP–16
PDIP–16
Publication Order Number:
CASE 751B
CASE 948F
DT SUFFIX
TSSOP–16
CASE 648
CASE 966
N SUFFIX
D SUFFIX
M SUFFIX
EIAJ–16
DIP–16
SO–16
2500 Tape & Reel
2500 Tape & Reel
2500 Tape & Reel
2500 Tape & Reel
2000 Tape & Reel
2000 Tape & Reel
MC74AC257/D
25 Units/Rail
25 Units/Rail
48 Units/Rail
48 Units/Rail
96 Units/Rail
96 Units/Rail
50 Units/Rail
www.DataSheet4U.com
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MC74ACT257 Summary of contents

Page 1

... SOIC–16 MC74AC257DT 96 Units/Rail TSSOP–16 MC74ACT257DT 96 Units/Rail TSSOP–16 MC74AC257DTR2 2500 Tape & Reel TSSOP–16 MC74ACT257DTR2 TSSOP–16 2500 Tape & Reel MC74ACT257M 50 Units/Rail EIAJ–16 MC74AC257MEL 2000 Tape & Reel EIAJ–16 MC74ACT257MEL 2000 Tape & Reel EIAJ–16 ...

Page 2

... NOTE: This diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays. MC74AC257, MC74ACT257 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 ...

Page 3

... Data Sheets for devices that differ from the typical input rise and fall times from 0 2.0 V; see individual Data Sheets for devices that differ from the typical input rise and fall times. in MC74AC257, MC74ACT257 Parameter Parameter AC ACT ...

Page 4

... Supply Current *All outputs loaded; thresholds on input associated with output under test. †Maximum test duration 2.0 ms, one output loaded at a time. NOTE: I and I @ 3.0 V are guaranteed to be less than or equal to the respective limit @ 5 MC74AC257, MC74ACT257 74AC 74AC +25 C – ...

Page 5

... Output Enable Time PZL PZL t t Output Disable Time Output Disable Time PHZ PHZ t t Output Disable Time Output Disable Time PLZ PLZ *Voltage Range 3 3.3 V 0.3 V. *Voltage Range 5 5.0 V 0.5 V. MC74AC257, MC74ACT257 74AC + ( Min Typ 3.3 1.5 5.0 5 ...

Page 6

... OHD I Maximum Quiescent esce CC Supply Current *All outputs loaded; thresholds on input associated with output under test. †Maximum test duration 2.0 ms, one output loaded at a time. MC74AC257, MC74ACT257 74ACT 74ACT +25 C – (V) +85 C Typ Guaranteed Limits 4 ...

Page 7

... PZL t Output Disable Time PHZ t Output Disable Time PLZ *Voltage Range 5 5.0 V 0.5 V. CAPACITANCE Symbol Parameter C Input Capacitance IN C Power Dissipation Capacitance PD DIP–16 MC74AC257N AWLYYWW MC74ACT257N AWLYYWW MC74AC257, MC74ACT257 74ACT (V) L Min Typ 5 0 5.0 1 5.0 5 ...

Page 8

... –A– –B– –T– MC74AC257, MC74ACT257 PACKAGE DIMENSIONS PDIP–16 N SUFFIX 16 PIN PLASTIC DIP PACKAGE CASE 648–08 ISSUE R L –T– SO–16 D SUFFIX 16 PIN PLASTIC SOIC PACKAGE CASE 751B–05 ISSUE J ...

Page 9

... IDENT –V– C –T– VIEW MC74AC257, MC74ACT257 PACKAGE DIMENSIONS TSSOP–16 DT SUFFIX CASE948F–01 ISSUE Ç Ç Ç É É É É É É Ç Ç Ç B SECTION N–N –U– J ...

Page 10

... Notes MC74AC257, MC74ACT257 http://onsemi.com 10 ...

Page 11

... Notes MC74AC257, MC74ACT257 http://onsemi.com 11 ...

Page 12

... Fax: 303–675–2176 or 800–344–3867 Toll Free USA/Canada Email: ONlit@hibbertco.com N. American Technical Support: 800–282–9855 Toll Free USA/Canada MC74AC257, MC74ACT257 JAPAN: ON Semiconductor, Japan Customer Focus Center 4–32–1 Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–0031 Phone: 81–3–5740–2700 Email: r14525@onsemi ...

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