Texas Instruments CD74AC139 CD74ACT139 User's Manual and Specifications
Summary
Acquire the technical datasheet and specifications for CD74AC139 and CD74ACT139, dual 2-to-4-line decoders/demultiplexers. This resource provides engineers with detailed functional diagrams, absolute maximum ratings, electrical characteristics, and operating conditions necessary for precise circuit implementation. Perfect for electronics designers who require robust CMOS logic components that offer accurate decoding and demultiplexing functions across various supply voltages.
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CD74AC139, CD74ACT139
Data sheet acquired from Harris Semiconductor SCHS235
September 1998 Dual 2-to-4-Line Decoder/Demultiplexer
Features Description Buffered Inputs The CD74AC139 and CD74ACT139 are dual 2-to-4-line
decoders/demultiplexers that utilize the Harris Advanced
Typical Propagation Delay
CMOS Logic technology. These devices contain two inde-
5.4ns at VCC = 5V, TA = 25o C, CL = 50p F
pendent binary to one-of-four decoders, each with single active LOW enable input (1E or 2E). Data on the select
Exceeds 2k V ESD Protection MIL-STD-883, Method
inputs (1A0 and 1A1 or 2A0 and 2A1) cause one of the four normally HIGH outputs to go LOW.
SCR-Latchup-Resistant CMOS Process and Circuit
If the enable input is HIGH, all four outputs remain HIGH. For
Design
[ /Title
demultiplexer operation, the enable input is the data input.
(CD74 Speed of Bipolar FAST™/AS/S with Significantly The enable input also functions as chip select when these Reduced Power Consumption devices are cascaded.
AC139
Balanced Propagation Delays
Ordering Information
CD74 AC Types Feature 1.5V to 5.5V Operation and
PART TEMP. PKG.
ACT13 Balanced Noise Immunity at 30% of the Supply
NUMBER RANGE (o C) PACKAGE NO.
9) ±24m A Output Drive Current
CD74AC139E 0 to 70o C, -40 to 85, 16 Ld PDIP E16.3
/Sub- Fanout to 15 FAST™ ICs -55 to 125 ject Drives 50Ω Transmission Lines
CD74ACT139E 0 to 70o C, -40 to 85, 16 Ld PDIP E16.3
(Dual -55 to 125
2-to-4- CD74AC139M96 0 to 70o C, -40 to 85, 16 Ld SOIC M16.15
-55 to 125
CD74ACT139M 0 to 70o C, -40 to 85, 16 Ld SOIC M16.15
Decod
-55 to 125
er/Dem
NOTES:
ulti-
1. When ordering, use the entire part number. Add the suffix to
plexer)
obtain the variant in the tape and reel.
/Autho 2. Wafer and die for this part number is available which meets all elec-
r () trical specifications. Please contact your local sales office or Harris customer service for ordering information.
/Key- words (Har-
Pinout
Semi- CD74AC139, CD74ACT139 (PDIP, SOIC)
TOP VIEW
ductor, Advan
1E VCC
/Cre-
ator ()
/DOCI
GND 2Y3
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
File Number 1953.1
FAST™ is a Trademark of Fairchild Semiconductor. Copyright © Harris Corporation 1998
Page Summary Contents For Texas Instruments CD74AC139 CD74ACT139 User's Manual and Specifications
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 7 |
| File Size | 30.66 KB |
| Published | June 22, 2026 |
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Frequently Asked Questions
Are these ICs sensitive to electrostatic charge during handling?
Yes, these devices are sensitive to electrostatic discharge, so users must follow proper IC Handling Procedures.
What is the operating voltage range for the CD74AC139/CD74ACT139 decoders?
The recommended supply voltage (Vcc) range varies: 1.5V to 5.5V for AC Types, and 4.5V to 5.5V for ACT Types.
How does the enable input function in this demultiplexer?
The enable (E or 2E) input controls operation: if it is HIGH, all four outputs remain HIGH; otherwise, select inputs determine which low output activates.
What packaging and temperature specifications are available for these parts?
Packages include PDIP and SOIC. The operating temperature range is specified from -55°C to 125°C for the devices themselves.