MC74AC258 Motorola, MC74AC258 Datasheet

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MC74AC258

Manufacturer Part Number
MC74AC258
Description
QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS
Manufacturer
Motorola
Datasheet

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( DataSheet : www.DataSheet4U.com )
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Quad 2 Input Multiplexer
with 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 the complement (inverted)
form. The outputs may be switched to a high impedance state with a HIGH on the
common Output Enable (OE) input, allowing the outputs to interface directly with
bus-oriented systems.
TRUTH TABLE
H = HIGH Voltage Level
L = LOW Voltage Level
X = Immaterial
Z = High Impedance
Multiplexer Expansion by Tying Outputs Together
Inverting 3-State Outputs
Outputs Source/Sink 24 mA
V CC
ACT258 Has TTL Compatible Inputs
The MC74AC258/74ACT258 is a quad 2-input multiplexer with 3-state outputs.
16
S
1
Output
Enable
OE
H
L
L
L
L
OE
I 0a
15
2
I 0c
I 1a
14
3
Select
Input
I 1c
13
Z a
4
H
H
S
X
L
L
I 0b
Z c
12
5
I 0d
I 1b
I 0
H
11
X
X
X
L
6
Inputs
Data
I 1d
10
Z b
7
I 1
X
H
X
X
L
GND
Z d
9
8
Outputs
H
H
Z
Z
L
L
PIN NAMES
S
OE
I 0a –I 0d
I 1a –I 1d
Z a –Z d
FACT DATA
Common Data Select Input
3-State Output Enable Input
Data Inputs from Source 0
Data Inputs from Source 1
3-State Multiplexer Outputs
5-1
MC74ACT258
MC74AC258
S
OE I 0a I 1a I 0b I 1b
MULTIPLEXER WITH
3-STATE OUTPUTS
Z a
QUAD 2-INPUT
CASE 751B-05
LOGIC SYMBOL
CASE 648-08
N SUFFIX
D SUFFIX
PLASTIC
PLASTIC
Z b
Z c
I 0c I 1c I 0d I 1d
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Z d

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MC74AC258 Summary of contents

Page 1

... DataSheet : www.DataSheet4U.com ) Quad 2 Input Multiplexer with 3 State Outputs The MC74AC258/74ACT258 is a quad 2-input multiplexer with 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 the complement (inverted) form. The outputs may be switched to a high impedance state with a HIGH on the common Output Enable (OE) input, allowing the outputs to interface directly with bus-oriented systems ...

Page 2

... FUNCTIONAL DESCRIPTION The MC74AC258/74ACT258 is a quad 2-input multiplexer with 3-state outputs. It selects four bits of data from two sources under control of a common Select input (S). When the Select input is LOW, the I 0x inputs are selected and when Select is HIGH, the I 1x inputs are selected. The data on the selected inputs appears at the outputs in inverted form ...

Page 3

... MC74AC258 MC74ACT258 MAXIMUM RATINGS* Symbol Supply Voltage (Referenced to GND Input Voltage (Referenced to GND) V out DC Output Voltage (Referenced to GND Input Current, per Pin I out DC Output Sink/Source Current, per Pin GND Current per Output Pin T stg Storage Temperature * Maximum Ratings are those values beyond which damage to the device may occur ...

Page 4

... MC74AC258 MC74ACT258 DC CHARACTERISTICS Symbol Symbol Parameter Parameter V IH Minimum High Level Input Voltage Input Voltage V IL Maximum Low Level Input Voltage Input Voltage V OH Minimum High Level Output Voltage Output Voltage V OL Maximum Low Level Output Voltage Output Voltage I IN Maximum Input ...

Page 5

... MC74AC258 MC74ACT258 AC CHARACTERISTICS (For Figures and Waveforms — See Section 3) Symbol Symbol Parameter Parameter Propagation Delay t PLH t PLH Propagation Delay t PHL t PHL Propagation Delay t PLH t PLH Propagation Delay t PHL t PHL PZH t PZH Output Enable Time ...

Page 6

... MC74AC258 MC74ACT258 DC CHARACTERISTICS Symbol Symbol Parameter Parameter V IH Minimum High Level Input Voltage Input Voltage V IL Maximum Low Level Input Voltage Input Voltage V OH Minimum High Level Output Voltage Output Voltage V OL Maximum Low Level Output Voltage Output Voltage I IN Maximum Input ...

Page 7

... MC74AC258 MC74ACT258 AC CHARACTERISTICS (For Figures and Waveforms — See Section 3) Symbol Symbol Parameter Parameter Propagation Delay t PLH t PLH Propagation Delay t PHL t PHL Propagation Delay t PLH t PLH Propagation Delay ...

Page 8

... MC74AC258 MC74ACT258 –A– 0.25 (0.010) –A– –T– SEATING PLANE 0.25 (0.010 Motorola reserves the right to make changes without further notice to any products herein. Motorola makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does Motorola assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation consequential or incidental damages. “ ...

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