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Número de pieza | 74HC138A | |
Descripción | 1-OF-8 DECODER / DEMULTIPLEXER | |
Fabricantes | Motorola Semiconductors | |
Logotipo | ||
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SEMICONDUCTOR TECHNICAL DATA
1-of-8 Decoder/Demultiplexer
High–Performance Silicon–Gate CMOS
The MC54/74HC138A is identical in pinout to the LS138. The device
inputs are compatible with standard CMOS outputs; with pullup resistors,
they are compatible with LSTTL outputs.
The HC138A decodes a three–bit Address to one–of–eight active–low
outputs. This device features three Chip Select inputs, two active–low and
one active–high to facilitate the demultiplexing, cascading, and chip–select-
ing functions. The demultiplexing function is accomplished by using the
Address inputs to select the desired device output; one of the Chip Selects is
used as a data input while the other Chip Selects are held in their active
www.DataShesetta4Ute.sc.om
• Output Drive Capability: 10 LSTTL Loads
• Outputs Directly Interface to CMOS, NMOS and TTL
• Operating Voltage Range: 2.0 to 6.0 V
• Low Input Current: 1.0 µA
• High Noise Immunity Characteristic of CMOS Devices
• In Compliance with the Requirements Defined by JEDEC Standard
No. 7A
• Chip Complexity: 100 FETs or 29 Equivalent Gates
LOGIC DIAGRAM
ADDRESS
INPUTS
A0 1
A1 2
A2 3
15 Y0
14 Y1
13 Y2
12 Y3
11 Y4
10
Y5
9 Y6
7
Y7
ACTIVE–LOW
OUTPUTS
CS1 6
CHIP–
4
SELECT CS2
INPUTS CS3 5
PIN 16 = VCC
PIN 8 = GND
FUNCTION TABLE
Inputs
Outputs
CS1CS2 CS3 A2 A1 A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
X X H XXX HHH HHHH H
X H X XXX HHH HHHH H
L X X XXX HHH HHHH H
H L L LLL LHHHHHHH
H L L LLHH L HHHHHH
H L L LHL HH L HHHHH
H L L LHH H H H L H H H H
H L L HLL HHHH L HHH
H L L HLHHHHHH L HH
H L L HHL H H H H H H L H
H L L HHH H H H H H H H L
H = high level (steady state); L = low level (steady state);
X = don’t care
10/95
© Motorola, Inc. 1995
1
MC54/74HC138A
16
1
J SUFFIX
CERAMIC PACKAGE
CASE 620–10
16
1
N SUFFIX
PLASTIC PACKAGE
CASE 648–08
16
1
D SUFFIX
SOIC PACKAGE
CASE 751B–05
16
1
DT SUFFIX
TSSOP PACKAGE
CASE 948F–01
ORDERING INFORMATION
MC54HCXXXAJ
MC74HCXXXAN
MC74HCXXXAD
MC74HCXXXADT
Ceramic
Plastic
SOIC
TSSOP
PIN ASSIGNMENT
A0 1
A1 2
A2 3
CS2 4
CS3 5
CS1 6
Y7 7
GND 8
16 VCC
15 Y0
14 Y1
13 Y2
12 Y3
11 Y4
10 Y5
9 Y6
REV 6
1 page EXPANDED LOGIC DIAGRAM
www.DataSheet4U.com
A0 1
A1 2
A2 3
CS3 5
CS2 4
CS1 6
MC54/74HC138A
15 Y0
14 Y1
13 Y2
12 Y3
11 Y4
10 Y5
9 Y6
7 Y7
High–Speed CMOS Logic Data
DL129 — Rev 6
5
MOTOROLA
5 Page |
Páginas | Total 7 Páginas | |
PDF Descargar | [ Datasheet 74HC138A.PDF ] |
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