1
Data sheet acquired from Harris Semiconductor
SCHS235
Features
• Buffered Inputs
• Typical Propagation Delay
- 5.4ns at V
CC
= 5V, T
A
= 25
o
C, C
L
= 50pF
• Exceeds 2kV ESD Protection MIL-STD-883, Method
3015
• SCR-Latchup-Resistant CMOS Process and Circuit
Design
• Speed of Bipolar FAST™/AS/S with Significantly
Reduced Power Consumption
• Balanced Propagation Delays
• AC Types Feature 1.5V to 5.5V Operation and
Balanced Noise Immunity at 30% of the Supply
• ±24mA Output Drive Current
- Fanout to 15 FAST™ ICs
- Drives 50Ω Transmission Lines
Description
The CD74AC139 and CD74ACT139 are dual 2-to-4-line
decoders/demultiplexers that utilize the Harris Advanced
CMOS Logic technology. These devices contain two inde-
pendent binary to one-of-four decoders, each with a single
active LOW enable input (1E or 2E). Data on the select
inputs (1A0 and 1A1 or 2A0 and 2A1) cause one of the four
normally HIGH outputs to go LOW.
If the enable input is HIGH, all four outputs remain HIGH. For
demultiplexer operation, the enable input is the data input.
The enable input also functions as a chip select when these
devices are cascaded.
Pinout
CD74AC139, CD74ACT139
(PDIP, SOIC)
TOP VIEW
Ordering Information
PART
NUMBER
TEMP.
RANGE (
o
C) PACKAGE
PKG.
NO.
CD74AC139E 0 to 70
o
C, -40 to 85,
-55 to 125
16 Ld PDIP E16.3
CD74ACT139E 0 to 70
o
C, -40 to 85,
-55 to 125
16 Ld PDIP E16.3
CD74AC139M96 0 to 70
o
C, -40 to 85,
-55 to 125
16 Ld SOIC M16.15
CD74ACT139M 0 to 70
o
C, -40 to 85,
-55 to 125
16 Ld SOIC M16.15
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Wafer and die for this part number is available which meets all elec-
trical specifications. Please contact your local sales office or Harris
customer service for ordering information.
14
15
16
9
13
12
11
10
1
2
3
4
5
7
6
8
1E
1A0
1A1
1Y0
1Y1
1Y2
GND
1Y3
V
CC
2A0
2A1
2Y0
2Y1
2Y2
2Y3
2E
September 1998
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
FAST™ is a Trademark of Fairchild Semiconductor.
Copyright © Harris Corporation 1998
CD74AC139,
CD74ACT139
Dual 2-to-4-Line Decoder/Demultiplexer
File Number 1953.1
[ /Title
(CD74
AC139
,
CD74
ACT13
9)
/Sub-
ject
(Dual
2-to-4-
Line
Decod
er/Dem
ulti-
plexer)
/Autho
r ()
/Key-
words
(Har-
ris
Semi-
con-
ductor,
Advan
ced
CMOS
)
/Cre-
ator ()
/DOCI
NFO