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IK Semiconductor

IN74HC139A Datasheet Preview

IN74HC139A Datasheet

Dual 2-4 Decoder/Demultiplexer

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Dual 1-of-4 Decoder/Demultiplexer
TECHNICAL DATA
IN74HC139A
The IN74HC139A 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
IN74HC139AN Plastic
IN74HC139AD SOIC
TA = -55° to 125° C for all packages
LOGIC DIAGRAM
PIN ASSIGNMENT
PIN 16 =VCC
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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
1




IK Semiconductor

IN74HC139A Datasheet Preview

IN74HC139A Datasheet

Dual 2-4 Decoder/Demultiplexer

No Preview Available !

IN74HC139A
MAXIMUM RATINGS*
Symbol
Parameter
Value
VCC
VIN
VOUT
IIN
IOUT
ICC
PD
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Current, per Pin
DC Supply Current, VCC and GND Pins
Power Dissipation in Still Air, Plastic DIP**
SOIC Package**
-0.5 to +7.0
-1.5 to VCC +1.5
-0.5 to VCC +0.5
±20
±25
±50
750
500
Tstg Storage Temperature
-65 to +150
TL Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
260
* Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
**Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C
SOIC Package: - 7 mW/°C from 65° to 125°C
Unit
V
V
V
mA
mA
mA
mW
°C
°C
RECOMMENDED OPERATING CONDITIONS
Symbol
Parameter
VCC
VIN, VOUT
TA
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
Operating Temperature, All Package Types
tr, tf Input Rise and Fall Time (Figure 1)
VCC =2.0 V
VCC =4.5 V
VCC =6.0 V
Min Max Unit
2.0 6.0
V
0 VCC V
-55 +125 °C
0
1000
ns
0 500
0 400
This device contains protection circuitry to guard against damage due to high static voltages or electric fields.
However, precautions must be taken to avoid applications of any voltage higher than maximum rated voltages to this
high-impedance circuit. For proper operation, VIN and VOUT should be constrained to the range GND(VIN or
VOUT)VCC.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC). Unused
outputs must be left open.
2


Part Number IN74HC139A
Description Dual 2-4 Decoder/Demultiplexer
Maker IK Semiconductor
Total Page 6 Pages
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