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KK74AC138 Schematic ( PDF Datasheet ) - KODENSHI KOREA

Teilenummer KK74AC138
Beschreibung 1-of-8 Decoder/Demultiplexer High-Speed Silicon-Gate CMOS
Hersteller KODENSHI KOREA
Logo KODENSHI KOREA Logo 




Gesamt 6 Seiten
KK74AC138 Datasheet, Funktion
1-of-8 Decoder/Demultiplexer
High-Speed Silicon-Gate CMOS
TECHNICAL DATA
www.DataSheet4U.com
KK74AC138
The KK74AC138 is identical in pinout to the LS/ALS138,
HC/HCT138. The device inputs are compatible with standard CMOS
outputs; with pullup resistors, they are compatible with LS/ALS outputs.
The KK74AC138 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-
selecting 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 states.
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1.0 µA; 0.1 µA @ 25°C
High Noise Immunity Characteristic of CMOS Devices
Outputs Source/Sink 24 mA
ORDERING INFORMATION
KK74AC138N Plastic
KK74AC138D SOIC
TA = -40° to 85° C for all packages
PIN ASSIGNMENT
LOGIC DIAGRAM
PIN 16 =VCC
PIN 8 = GND
FUNCTION TABLE
Inputs
Outputs
CS1CS2CS3 A2 A1A0 Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
XXH
XHX
LXX
XXX
XXX
XXX
H H H HHHHH
H H H HHHHH
H H H HHHHH
HLL
HLL
HLL
HLL
LLL
LLH
LHL
LHH
L H H HHHHH
H L H HHHHH
H H L HHHHH
H H H LHHHH
HLL
HLL
HLL
HLL
HLL
HLH
HHL
HHH
H H H HLHHH
H H H HHLHH
H H H HHHLH
H H H HHHHL
H = high level (steady state)
L = low level (steady state)
X = don’t care
1






KK74AC138 Datasheet, Funktion
KK74AC138
www.DataSheet4U.com
N SUFFIX PLASTIC DIP
(MS - 001BB)
A
16 9
B
18
FL
C
-T- SEATING
PLANE
N
G
KM
D
H
NOTES:
0.25 (0.010) M T
1. Dimensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
J
Symbol
A
B
C
D
F
G
H
J
K
L
M
N
Dimension, mm
MIN MAX
18.67 19.69
6.1 7.11
5.33
0.36 0.56
1.14 1.78
2.54
7.62
0° 10°
2.92 3.81
7.62 8.26
0.2 0.36
0.38
D SUFFIX SOIC
(MS - 012AC)
A
16 9
H BP
1G
8
C
R x 45
-T-
D
SEATING
K PLANE
0.25 (0.010) M T C M
J
F
NOTES:
1. Dimensions A and B do not include mold flash or protrusion.
2. Maximum mold flash or protrusion 0.15 mm (0.006) per side
for A; for B 0.25 mm (0.010) per side.
Symbol
A
B
C
D
F
G
MH
J
K
M
P
R
Dimension, mm
MIN MAX
9.8 10
3.8 4
1.35 1.75
0.33 0.51
0.4 1.27
1.27
5.72
0° 8°
0.1 0.25
0.19 0.25
5.8 6.2
0.25 0.5
6

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