SN54F138, SN74F138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDFS051B – MARCH 1987 – REVISED JULY 1996
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
D
Designed Specifically for High-Speed
Memory Decoders and Data Transmission
Systems
D
Incorporates Three Enable Inputs to
Simplify Cascading and/or Data Reception
D
Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
description
The ′F138 is designed to be used in
high-performance memory-decoding or data-
routing applications requiring very short
propagation delay times. In high-performance
memory systems, these decoders can be used to
minimize the effects of system decoding. When
employed with high-speed memories utilizing a
fast enable circuit, the delay times of this decoder
and the enable time of the memory are usually
less than the typical access time of the memory.
This means that the effective system delay
introduced by the decoder is negligible.
The conditions at the binary-select inputs and the
three enable inputs select one of eight output
lines. Two active-low and one active-high enable
inputs reduce the need for external gates or
inverters when expanding. A 24-line decoder can
be implemented without external inverters and a 32-line decoder requires only one inverter. An enable input can
be used as a data input for demultiplexing applications.
The SN54F138 is characterized for operation over the full military temperature range of –55°C to 125°C. The
SN74F138 is characterized for operation from 0°C to 70°C.
Copyright 1996, Texas Instruments Incorporated
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.
SN54F138 ...J PACKAGE
SN74F138 ...D OR N PACKAGE
(TOP VIEW)
SN54F138 . . . FK PACKAGE
(TOP VIEW)
3212019
910111213
4
5
6
7
8
18
17
16
15
14
Y1
Y2
NC
Y3
Y4
C
G2A
NC
G2B
G1
B
A
NC
Y6
Y5 V
Y0
Y7
GND
NC CC
NC – No internal connection
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
A
B
C
G2A
G2B
G1
Y7
GND
VCC
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SN54F138, SN74F138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDFS051B – MARCH 1987 – REVISED JULY 1996
2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
FUNCTION TABLE
ENABLE INPUTS SELECT INPUTS OUTPUTS
G1 G2A G2B C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7
X H X X X X H H H H H H H H
XXHXXXHHHHHHHH
LXXXXXHHHHHHHH
HLLLLLLHHHHHHH
HLLLLHHLHHHHHH
HLLLHLHHLHHHHH
HLLLHHHHHLHHHH
HLLHLLHHHHLHHH
HLLHLHHHHHHLHH
HLLHHLHHHHHHLH
HLLHHHHHHHHHHL
logic symbols (alternatives)†
BIN/OCT
1
1
A
2
2
B
4
3
C
4
5
6
G1
Y0
15
0
&
EN
Y1
14
1
Y2
13
2
Y3
12
3
Y4
11
4
Y5
10
5
Y6
9
6
Y7
7
7
DMUX
0
1
A2
B
2
3
C
4
5
6
G1
Y0
15
0
&
Y1
14
1
Y2
13
2
Y3
12
3
Y4
11
4
Y5
10
5
Y6
9
6
Y7
7
7
G7
0
G2A
G2B
G2A
G2B
†These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
SN54F138, SN74F138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDFS051B – MARCH 1987 – REVISED JULY 1996
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
logic diagram (positive logic)
G2B
G2A
G1
C
B
A
Y7
Y6
Y5
Y4
Y3
Y2
Y1
Y0
Data
Outputs
Select
Inputs
Enable
Inputs
1
2
3
6
4
5
15
14
13
12
11
10
9
7
Pin numbers shown are for the D, J, and N packages.
SN54F138, SN74F138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDFS051B – MARCH 1987 – REVISED JULY 1996
4POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†
Supply voltage range, VCC –0.5 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input voltage range, VI (see Note 1) –1.2 V to 7 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input current range –30 mA to 5 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltage range applied to any output in the high state –0.5 V to VCC
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Current into any output in the low state 40 mA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating free-air temperature range: SN54F138 –55°C to 125°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SN74F138 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 af fect device reliability.
NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.
recommended operating conditions
SN54F138 SN74F138
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V
VIH High-level input voltage 2 2 V
VIL Low-level input voltage 0.8 0.8 V
IIK Input clamp current –18 –18 mA
IOH High-level output current –1 –1 mA
IOL Low-level output current 20 20 mA
TAOperating free-air temperature –55 125 0 70 °C
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
SN54F138 SN74F138
UNIT
PARAMETER
TEST
CONDITIONS
MIN TYP‡MAX MIN TYP‡MAX
UNIT
VIK VCC = 4.5 V, II = –18 mA –1.2 –1.2 V
VOH
VCC = 4.5 V, IOH = – 1 mA 2.5 3.4 2.5 3.4
V
V
OH VCC = 4.75 V, IOH = – 1 mA 2.7
V
VOL VCC = 4.5 V, IOL = 20 mA 0.3 0.5 0.3 0.5 V
IIVCC = 5.5 V, VI = 7 V 0.1 0.1 mA
IIH VCC = 5.5 V, VI = 2.7 V 20 20 µA
IIL VCC = 5.5 V, VI = 0.5 V – 0.6 – 0.6 mA
IOS§VCC = 5.5 V, VO = 0 –60 –150 –60 –150 mA
ICC VCC = 5.5 V, See Note 2 13 20 13 20 mA
‡All typical values are at VCC = 5 V, TA = 25°C.
§Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second.
NOTE 2: ICC is measured with outputs enabled and open.
SN54F138, SN74F138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDFS051B – MARCH 1987 – REVISED JULY 1996
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics (see Note 3)
PARAMETER FROM
(
INPUT
)
TO
(
OUTPUT
)
VCC = 5 V,
CL = 50 PF,
RL = 500 Ω,
TA = 25°C
VCC = 4.5 V TO 5.5 V,
CL = 50 PF,
RL = 500 Ω,
TA = MIN TO MAX†UNIT
(INPUT)
(OUTPUT)
′F138 SN54F138 SN74F138
MIN TYP MAX MIN MAX MIN MAX
tPLH
ABorC
Y
2.7 5.2 7.5 2.7 12 2.7 8.5
ns
tPHL
A
,
B
,
or
C
Y
3.2 5.7 8 3.2 9.5 3.2 9
ns
tPLH
G2A or G2B
Y
2.7 5 7 2.7 11 2.7 8
ns
tPHL
G2A
or
G2B
Y
2.2 4.9 7 2.2 8 2.2 7.5
ns
tPLH
G1
Y
3.2 5.8 8 3.2 12.5 3.2 9
ns
tPHL
G1
Y
2.7 5.2 7.5 2.7 8.5 2.7 8.5
ns
†For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions.
NOTE 3: Load circuits and waveforms are shown in Section 1.
PACKAGE OPTION ADDENDUM
www.ti.com 21-Jan-2021
Addendum-Page 1
PACKAGING INFORMATION
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead finish/
Ball material
(6)
MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
5962-9758201Q2A ACTIVE LCCC FK 20 1 Non-RoHS
& Green POST-PLATE N / A for Pkg Type -55 to 125 5962-
9758201Q2A
SNJ54F
138FK
5962-9758201QEA ACTIVE CDIP J 16 1 Non-RoHS
& Green SNPB N / A for Pkg Type -55 to 125 5962-9758201QE
A
SNJ54F138J
5962-9758201QFA ACTIVE CFP W 16 1 Non-RoHS
& Green SNPB N / A for Pkg Type -55 to 125 5962-9758201QF
A
SNJ54F138W
JM38510/33701B2A ACTIVE LCCC FK 20 1 Non-RoHS
& Green POST-PLATE N / A for Pkg Type -55 to 125 JM38510/
33701B2A
JM38510/33701BEA ACTIVE CDIP J 16 1 Non-RoHS
& Green SNPB N / A for Pkg Type -55 to 125 JM38510/
33701BEA
JM38510/33701BFA ACTIVE CFP W 16 1 Non-RoHS
& Green SNPB N / A for Pkg Type -55 to 125 JM38510/
33701BFA
M38510/33701B2A ACTIVE LCCC FK 20 1 Non-RoHS
& Green POST-PLATE N / A for Pkg Type -55 to 125 JM38510/
33701B2A
M38510/33701BEA ACTIVE CDIP J 16 1 Non-RoHS
& Green SNPB N / A for Pkg Type -55 to 125 JM38510/
33701BEA
M38510/33701BFA ACTIVE CFP W 16 1 Non-RoHS
& Green SNPB N / A for Pkg Type -55 to 125 JM38510/
33701BFA
SN54F138J ACTIVE CDIP J 16 1 Non-RoHS
& Green SNPB N / A for Pkg Type -55 to 125 SN54F138J
SN74F138D ACTIVE SOIC D 16 40 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 F138
SN74F138DR ACTIVE SOIC D 16 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 F138
SN74F138DRG4 ACTIVE SOIC D 16 2500 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 F138
SN74F138N ACTIVE PDIP N 16 25 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 SN74F138N
SN74F138NE4 ACTIVE PDIP N 16 25 RoHS & Green NIPDAU N / A for Pkg Type 0 to 70 SN74F138N
SN74F138NSR ACTIVE SO NS 16 2000 RoHS & Green NIPDAU Level-1-260C-UNLIM 0 to 70 74F138
PACKAGE OPTION ADDENDUM
www.ti.com 21-Jan-2021
Addendum-Page 2
Orderable Device Status
(1)
Package Type Package
Drawing Pins Package
Qty Eco Plan
(2)
Lead finish/
Ball material
(6)
MSL Peak Temp
(3)
Op Temp (°C) Device Marking
(4/5)
Samples
SNJ54F138FK ACTIVE LCCC FK 20 1 Non-RoHS
& Green POST-PLATE N / A for Pkg Type -55 to 125 5962-
9758201Q2A
SNJ54F
138FK
SNJ54F138J ACTIVE CDIP J 16 1 Non-RoHS
& Green SNPB N / A for Pkg Type -55 to 125 5962-9758201QE
A
SNJ54F138J
SNJ54F138W ACTIVE CFP W 16 1 Non-RoHS
& Green SNPB N / A for Pkg Type -55 to 125 5962-9758201QF
A
SNJ54F138W
(1) The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based
flame retardants must also meet the <=1000ppm threshold requirement.
(3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature.
(4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device.
(5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation
of the previous line and the two combined represent the entire Device Marking for that device.
(6) Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two
lines if the finish value exceeds the maximum column width.
Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information
provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and
PACKAGE OPTION ADDENDUM
www.ti.com 21-Jan-2021
Addendum-Page 3
continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals.
TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release.
In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis.
OTHER QUALIFIED VERSIONS OF SN54F138, SN74F138 :
•Catalog: SN74F138
•Military: SN54F138
NOTE: Qualified Version Definitions:
•Catalog - TI's standard catalog product
•Military - QML certified for Military and Defense Applications
TAPE AND REEL INFORMATION
*All dimensions are nominal
Device Package
Type Package
Drawing Pins SPQ Reel
Diameter
(mm)
Reel
Width
W1 (mm)
A0
(mm) B0
(mm) K0
(mm) P1
(mm) W
(mm) Pin1
Quadrant
SN74F138DR SOIC D 16 2500 330.0 16.4 6.5 10.3 2.1 8.0 16.0 Q1
SN74F138NSR SO NS 16 2000 330.0 16.4 8.2 10.5 2.5 12.0 16.0 Q1
PACKAGE MATERIALS INFORMATION
www.ti.com 30-Dec-2020
Pack Materials-Page 1
*All dimensions are nominal
Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm)
SN74F138DR SOIC D 16 2500 333.2 345.9 28.6
SN74F138NSR SO NS 16 2000 367.0 367.0 38.0
PACKAGE MATERIALS INFORMATION
www.ti.com 30-Dec-2020
Pack Materials-Page 2
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