Freelance Electronics Components Distributor
Closed Dec 25th-26th
800-300-1968

We Stock Hard to Find Parts
My Account | My Orders | My Cart
Questions? (800) 300-1968

SNJ54ALS139FK

Part # SNJ54ALS139FK
Description Decoder/Demultiplexer Dual 2-to-4 20-Pin CLLCC Tube
Category IC
Availability In Stock
Qty 14
Qty Price
1 - 2 $22.96021
3 - 5 $18.26381
6 - 8 $17.22016
9 - 11 $16.00257
12 + $14.26316
Manufacturer Available Qty
Texas Instruments
Date Code: 9451
  • Shipping Freelance Stock: 13
    Ships Immediately
Texas Instruments
Date Code: 8908
  • Shipping Freelance Stock: 1
    Ships Immediately

Related Items

SNJ5400W
Texas Instruments
IC
SNJ5400W
$11.63320
SNJ5401J
Texas Instruments
IC
SNJ5401J
$8.02689
SNJ5401W
Texas Instruments
IC
SNJ5401W
$10.60761
SNJ5402J
Texas Instruments
IC
SNJ5402J
$3.06137
SNJ5405J
Texas Instruments
IC
SNJ5405J
$7.58055
SNJ5405W
Texas Instruments
IC
SNJ5405W
$10.71477


Technical Document


DISCLAIMER: The information provided herein is solely for informational purposes. Customers must be aware of the suitability of this product for their application, and consider that variable factors such as Manufacturer, Product Category, Date Codes, Pictures and Descriptions may differ from available inventory.

SN54ALS139, SN74ALS139
DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS
SDAS204A – APRIL 1982 – REVISED DECEMBER 1994
Copyright 1994, Texas Instruments Incorporated
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
• Designed Specifically for High-Speed
Memory Decoders and Data Transmission
Systems
• Incorporate Two Enable Inputs to Simplify
Cascading and/or Data Reception
• Package Options Include Plastic
Small-Outline (D) Packages, Ceramic Chip
Carriers (FK), and Standard Plastic (N) and
Ceramic (J) 300-mil DIPs
description
The ′ALS139 are dual 2-line to 4-line
decoders/demultiplexers designed for use in
high-performance memory-decoding or data-
routing applications requiring very short
propagation delay times. In high-performance
memory systems, these devices can minimize the
effects of system decoding. When employed with
high-speed memories utilizing a fast-enable
circuit, the delay times of these decoders and the
enable time of the memory are usually less than
the typical access time of the memory. Therefore,
the effective system delay introduced by the
Schottky-clamped system decoder is negligible.
The ′ALS139 comprise two individual 2-line to
4-line decoders in a single package. The
active-low enable (G
) input can be used as a data
line in demultiplexing applications. These
decoders/demultiplexers feature fully buffered inputs, each of which represents only one normalized load to its
driving circuit. All inputs are clamped with high-performance Schottky diodes to suppress line ringing and
simplify system design.
The SN54ALS139 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74ALS139 is characterized for operation from 0°C to 70°C.
FUNCTION TABLE
INPUTS
OUTPUTS
ENABLE
SELECT
OUTPUTS
ENABLE
G
B A Y0 Y1 Y2 Y3
H X X H H H H
L L LLHHH
L LHHLHH
L HLHHLH
L HHHHHL
SN54ALS139 ...J PACKAGE
SN74ALS139 ...D OR N PACKAGE
(TOP VIEW)
3 2 1 20 19
910111213
4
5
6
7
8
18
17
16
15
14
2A
2B
NC
2Y0
2Y1
1B
1Y0
NC
1Y1
1Y2
SN54ALS139 . . . FK PACKAGE
(TOP VIEW)
1A
1G
NC
2Y3
2Y2
2G
1Y3
GND
NC
NC – No internal connection
V
CC
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1G
1A
1B
1Y0
1Y1
1Y2
1Y3
GND
V
CC
2G
2A
2B
2Y0
2Y1
2Y2
2Y3
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
SN54ALS139, SN74ALS139
DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS
SDAS204A – APRIL 1982 – REVISED DECEMBER 1994
2
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic symbols (alternatives)
†
X/Y
1
2
1A
3
1B
13
2B
EN
1
15
14
2A
1Y0
4
0
1Y1
5
1
1Y2
6
2
1Y3
7
3
2Y0
12
2Y1
11
2Y2
10
2Y3
9
G
3
0
1G
2G
DMUX
0
2
1A
1
3
1B
13
2B
1
15
14
2A
1Y0
4
0
1Y1
5
1
1Y2
6
2
1Y3
7
3
2Y0
12
2Y1
11
2Y2
10
2Y3
9
1G
2G
†
These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
Pin numbers shown are for the D, J, and N packages.
logic diagram (positive logic)
Select
Inputs
Select
Inputs
2B
2A
Enable 2G
1B
1A
Enable 1G
Data
Outputs
2Y3
2Y2
2Y1
2Y0
1Y3
1Y2
1Y1
1Y0
1
2
3
15
14
13
4
5
6
7
12
11
10
9
Pin numbers shown are for the D, J, and N packages.
SN54ALS139, SN74ALS139
DUAL 2-LINE TO 4-LINE DECODERS/DEMULTIPLEXERS
SDAS204A – APRIL 1982 – REVISED DECEMBER 1994
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
†
Supply voltage, V
CC
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage, V
I
7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range, T
A
: SN54ALS139 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74ALS139 0°C to 70°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range –65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
recommended operating conditions
SN54ALS139 SN74ALS139
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
V
CC
Supply voltage 4.5 5 5.5 4.5 5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level input voltage 0.7 0.8 V
I
OH
High-level output current –0.4 –0.4 mA
I
OL
Low-level output current 4 8 mA
T
A
Operating free-air temperature –55 125 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54ALS139 SN74ALS139
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP
‡
MAX MIN TYP
‡
MAX
UNIT
V
IK
V
CC
= 4.5 V, I
I
= –18 mA –1.2 –1.2 V
V
OH
V
CC
= 4.5 V to 5.5 V, I
OH
= –0.4 mA V
CC
–2 V
CC
–2 V
V
OL
V
CC
=45V
I
OL
= 4 mA 0.25 0.4 0.25 0.4
V
V
OL
V
CC
=
4
.
5
V
I
OL
= 8 mA 0.35 0.5
V
I
I
V
CC
= 5.5 V, V
I
= 7 V 0.1 0.1 mA
I
IH
V
CC
= 5.5 V, V
I
= 2.7 V 20 20 µA
I
IL
V
CC
= 5.5 V, V
I
= 0.4 V –0.1 –0.1 mA
I
O
§
V
CC
= 5.5 V, V
O
= 2.25 V –20 –112 –30 –112 mA
I
CC
V
CC
= 5.5 V 8 13 8 13 mA
‡
All typical values are at V
CC
= 5 V, T
A
= 25°C.
§
The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, I
OS
.
switching characteristics (see Figure 1)
PARAMETER
FROM
(
INPUT
)
TO
(
OUTPUT
)
V
CC
= 4.5 V to 5.5 V,
C
L
= 50 pF,
R
L
= 500 Ω
,
T
A
= MIN to MAX
UNIT
(INPUT)
(OUTPUT)
SN54ALS139 SN74ALS139
MIN MAX MIN MAX
t
PLH
AorB
Y
3 17 3 14
ns
t
PHL
A
or
B
Y
3 17 3 14
ns
t
PLH
G
Y
3 17 3 14
ns
t
PHL
G
Y
3 18 3 15
ns
For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
12345NEXT
Address
Freelance Electronics
13197 Sandoval Street
Santa Fe Springs, CA 90670
 
Hours of Operation  (Holiday Hours)
Monday-Friday 7:30am-4:30pm PST
(Deadline for next day shipment 2:00pm PST)
Seal
Government Cage code#-1V4R6
Duns Number# 788130532
Certified Small Disadvantaged Business
Customer Service
Company
Information
Connect with Us
Twitter Facebook Instagra,
This site is protected by Trustwave's Trusted Commerce program