KK74HC139A Datasheet, PDF (1/6 Pages) KODENSHI KOREA CORP. – Dual 1-of-4 Decoder/Demultiplexer

Dual 1-of-4 Decoder/Demultiplexer
TECHNICAL DATA
KK74HC139A
The KK74HC139A is identical in pinout to the LS/ALS139. The
device inputs are compatible with standard CMOS outputs; with pullup
resistors, they are compatible with LS/ALSTTL outputs.
This device consists of two independent 1-of-4 decoders, each of
which decodes a two-bit Address to one-of-four active-low outputs.
Active-low Selects are provided to facilitate the demultiplexing and
cascading functions. The demultiplexing function is accomplished by
using the Address inputs to select the desired device output, and utilizing
the Select as a data input.
• 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
ORDERING INFORMATION
KK74HC139AN Plastic
KK74HC139AD SOIC
T_A = -55° to 125° C for all packages
LOGIC DIAGRAM
PIN ASSIGNMENT
PIN 16 =V_CC
PIN 8 = GND
FUNCTION TABLE
Inputs
Outputs
Select A1 A0 Y0 Y1 Y2 Y3
H
X X HH H H
L
L L LH H H
L
L HHL H H
L
H L HH L H
L
H H HH H L
X = don’t care
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