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MC74HC138A_05 Datasheet, PDF (1/10 Pages) ON Semiconductor – 1−of−8 Decoder/ Demultiplexer | |||
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MC74HC138A
1âofâ8 Decoder/
Demultiplexer
HighâPerformance SiliconâGate CMOS
The MC74HC138A 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 threeâbit Address to oneâofâeight
activeâlow outputs. This device features three Chip Select inputs, two
activeâlow and one activeâhigh to facilitate the demultiplexing,
cascading, and chipâselecting 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.
Features
⢠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 mA
⢠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
⢠PbâFree Packages are Available*
16
1
http://onsemi.com
MARKING
DIAGRAMS
16
PDIPâ16
N SUFFIX
CASE 648
MC74HC138AN
AWLYYWWG
1
16
1
16
1
16
SOICâ16
D SUFFIX
CASE 751B
HC138AG
AWLYWW
1
TSSOPâ16
DT SUFFIX
CASE 948F
16
HC
138A
ALYWG
G
1
16
1
SOEIAJâ16
F SUFFIX
CASE 966
16
74HC138A
ALYWG
1
A
= Assembly Location
L, WL = Wafer Lot
Y, YY = Year
W, WW = Work Week
G
= PbâFree Package
G
= PbâFree Package
(Note: Microdot may be in either location)
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
*For additional information on our PbâFree strategy and soldering details, please
download the ON Semiconductor Soldering and Mounting Techniques
Reference Manual, SOLDERRM/D.
© Semiconductor Components Industries, LLC, 2005
1
June, 2005 â Rev. 9
Publication Order Number:
MC74HC138A/D
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