74HC138
1−of−8 Decoder/
Demultiplexer
High−Performance Silicon−Gate CMOS
The 74HC138 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 HC138 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.
Features
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MARKING
DIAGRAMS
16
16
1
SOIC−16
D SUFFIX
CASE 751B
1
16
16
1
TSSOP−16
DT SUFFIX
CASE 948F
1
HC138 = Device Code
A
= Assembly Location
L, WL
= Wafer Lot
Y
= Year
W, WW = Work Week
G or
G
= Pb−Free Package
(Note: Microdot may be in either location)
HC
138
ALYW
G
G
HC138G
AWLYWW
•
•
•
•
•
•
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
m
A
High Noise Immunity Characteristic of CMOS Devices
In Compliance with the Requirements Defined by JEDEC
Standard No. 7A
•
ESD Performance: HBM
>
2000 V; Machine Model
>
200 V
•
Chip Complexity: 100 FETs or 29 Equivalent Gates
•
These are Pb−Free Devices
ORDERING INFORMATION
See detailed ordering and shipping information in the package
dimensions section on page 2 of this data sheet.
©
Semiconductor Components Industries, LLC, 2007
March, 2007
−
Rev. 1
1
Publication Order Number:
74HC138/D
ONSEMI [ ON SEMICONDUCTOR ]
