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PDF MC74F257A Data sheet ( Hoja de datos )
| Número de pieza | MC74F257A | |
| Descripción | QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS | |
| Fabricantes | Motorola Semiconductors | |
| Logotipo |  |
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QUAD 2-INPUT MULTIPLEXER
WITH 3-STATE OUTPUTS
The MC74F257 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 true (non-inverted) form. The
outputs may be switched to a high impedance state with a HIGH on the com-
mon Output Enable (OE) input, allowing the outputs to interface directly with
bus oriented systems.
• Multiplexer Expansion by Tying Outputs Together
• Non-Inverting 3-State Outputs
• Input Clamp Diodes Limit High-Speed Termination Effects
• AC Enhanced Version of the F257
CONNECTION DIAGRAM
VCC OE I0c I1c Zc I0d I1d
16 15 14 13 12 11 10
Zd
9
MC74F257A
QUAD 2-INPUT MULTIPLEXER
WITH 3-STATE OUTPUTS
FAST™ SCHOTTKY TTL
16
1
J SUFFIX
CERAMIC
CASE 620-09
12345678
S I0a I1a Za I0b I1b Zb GND
LOGIC DIAGRAM
OE I0a I1a I0b I1b I0c
I1c I0d I1d S
16
1
N SUFFIX
PLASTIC
CASE 648-08
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
MC54FXXXAJ Ceramic
MC74FXXXAN Plastic
MC74FXXXAD SOIC
Za Zb
FUNCTION TABLE
Output
Enable
Select
Input
OE S
HX
LH
LH
LL
LL
Data
Inputs
I0 I1
XX
XL
XH
LX
HX
Zc Zd
Outputs
Z
Z
L
H
L
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
Z = High Impedance
DataSheet4 U .com
FAST AND LS TTL DATA
4-127
LOGIC SYMBOL
1
4
7
12
9
VCC = PIN 16
GND = PIN 8
S
Za
Zb
Zc
Zd
OE
I0a
I1a
I0b
I1b
I0c
I1c
I0d
I1d
15
2
3
5
6
14
13
11
10
1 page | ||
| Páginas | Total 3 Páginas | |
| PDF Descargar | [ Datasheet MC74F257A.PDF ] | |
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| Número de pieza | Descripción | Fabricantes |
| MC74F257A | QUAD 2-INPUT MULTIPLEXER WITH 3-STATE OUTPUTS | Motorola Semiconductors |
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