S E M I C O N D U C T O R
CD74HC139,
CD74HCT139
High Speed CMOS Logic
Dual 2-to-4 Line Decoder/Demultiplexer
Description
The Harris CD74HC139, CD74HCT139 contain two
independent 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. This device is functionally the same
as the CD4556B and is pin compatible with it.
The outputs of these devices can drive 10 low power
Schottky TTL equivalent loads. The 74HCT logic family is
functionally as well as pin equivalent to the 74LS logic family.
September 1997
Features
• Multifunction Capability
- Binary to 1 of 4 Decoders or 1 to 4 Line
Demultiplexer
• Active Low Mutually Exclusive Outputs
• Fanout (Over Temperature Range)
- Standard Outputs . . . . . . . . . . . . . . . 10 LSTTL Loads
- Bus Driver Outputs . . . . . . . . . . . . . 15 LSTTL Loads
• Wide Operating Temperature Range . . . -55
o
C to 125
o
C
• Balanced Propagation Delay and Transition Times
• Significant Power Reduction Compared to LSTTL
Logic ICs
• HC Types
- 2V to 6V Operation
- High Noise Immunity: N
IL
= 30%, N
IH
= 30%of V
CC
at
V
CC
= 5V
• HCT Types
- 4.5V to 5.5V Operation
- Direct LSTTL Input Logic Compatibility,
V
IL
= 0.8V (Max), V
IH
= 2V (Min)
- CMOS Input Compatibility, I
l
≤
1µA at V
OL
, V
OH
• Memory Decoding, Data Routing, Code Conversion
Ordering Information
PART NUMBER
CD74HC139E
CD74HCT139E
CD74HC139M
NOTES:
1. When ordering, use the entire part number. Add the suffix 96 to
obtain the variant in the tape and reel.
2. Die is available which meets all electrical specifications. Please
contact your local sales office or Harris customer service for
ordering information.
TEMP. RANGE (
o
C)
-55 to 125
-55 to 125
-55 to 125
PACKAGE
16 Ld PDIP
16 Ld PDIP
16 Ld SOIC
PKG.
NO.
E16.3
E16.3
M16.15
Pinout
CD74HC139, CD74HCT139
(PDIP, SOIC)
TOP VIEW
1E 1
1A0 2
1A1 3
1Y0 4
1Y1 5
1Y2 6
1Y3 7
GND 8
16 V
CC
15 2E
14 2A0
13 2A1
12 2Y0
11 2Y1
10 2Y2
9 2Y3
CAUTION: These devices are sensitive to electrostatic discharge. Users should follow proper IC Handling Procedures.
Copyright
©
Harris Corporation 1997
File Number
1545.1
1
HARRIS [ HARRIS CORPORATION ]
