SN54F138, SN74F138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDFS051B – MARCH 1987 – REVISED JULY 1996
D
D
D
Designed Specifically for High-Speed
Memory Decoders and Data Transmission
Systems
Incorporates Three Enable Inputs to
Simplify Cascading and/or Data Reception
Package Options Include Plastic
Small-Outline Packages, Ceramic Chip
Carriers, and Standard Plastic and Ceramic
300-mil DIPs
SN54F138 . . . J PACKAGE
SN74F138 . . . D OR N PACKAGE
(TOP VIEW)
A
B
C
G2A
G2B
G1
Y7
GND
description
16
2
15
3
14
4
13
5
12
6
11
7
10
8
9
VCC
Y0
Y1
Y2
Y3
Y4
Y5
Y6
SN54F138 . . . FK PACKAGE
(TOP VIEW)
B
A
NC
VCC
Y0
The ′F138 is designed to be used in
high-performance memory-decoding or datarouting 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.
1
C
G2A
NC
G2B
G1
4
3 2 1 20 19
18
5
17
6
16
7
15
8
14
9 10 11 12 13
Y1
Y2
NC
Y3
Y4
Y7
GND
NC
Y6
Y5
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
NC – No internal connection
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.
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.
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
1
SN54F138, SN74F138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDFS051B – MARCH 1987 – REVISED JULY 1996
FUNCTION TABLE
ENABLE INPUTS
G1
G2A
X
X
SELECT INPUTS
OUTPUTS
G2B
C
B
A
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
H
X
X
X
X
H
H
H
H
H
H
H
H
X
H
X
X
X
H
H
H
H
H
H
H
H
L
X
X
X
X
X
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
H
H
L
H
H
H
H
H
H
H
L
L
L
H
L
H
H
L
H
H
H
H
H
H
L
L
L
H
H
H
H
H
L
H
H
H
H
H
L
L
H
L
L
H
H
H
H
L
H
H
H
H
L
L
H
L
H
H
H
H
H
H
L
H
H
H
L
L
H
H
L
H
H
H
H
H
H
L
H
H
L
L
H
H
H
H
H
H
H
H
H
H
L
logic symbols (alternatives)†
A
B
C
G1
1
2
3
6
4
G2A
G2B
5
BIN/OCT
1
0
2
1
4
2
3
&
4
EN
5
6
7
15
14
13
12
11
10
9
7
Y0
A
Y1
B
Y2
C
1
G1
Y5
G2A
Y6
G2B
3
6
4
5
Y7
POST OFFICE BOX 655303
G
2
0
7
1
2
&
3
4
5
6
7
† These symbols are in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.
2
0
2
Y3
Y4
DMUX
0
• DALLAS, TEXAS 75265
15
14
13
12
11
10
9
7
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
SN54F138, SN74F138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDFS051B – MARCH 1987 – REVISED JULY 1996
logic diagram (positive logic)
15
A
1
14
Select
Inputs
B
C
13
3
12
10
Enable
Inputs
6
9
4
7
G2A
G2B
Y1
2
11
G1
Y0
Y2
Y3
Data
Outputs
Y4
Y5
Y6
Y7
5
Pin numbers shown are for the D, J, and N packages.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
3
SN54F138, SN74F138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDFS051B – MARCH 1987 – REVISED JULY 1996
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 affect device reliability.
NOTE 1: The input voltage ratings may be exceeded provided the input current ratings are observed.
recommended operating conditions
SN54F138
VCC
VIH
Supply voltage
VIL
IIK
Low-level input voltage
IOH
IOL
High-level output current
Low-level output current
TA
Operating free-air temperature
High-level input voltage
SN74F138
MIN
NOM
MAX
MIN
NOM
MAX
4.5
5
5.5
4.5
5
5.5
2
2
Input clamp current
– 55
UNIT
V
V
0.8
0.8
V
– 18
– 18
mA
–1
–1
mA
20
20
mA
70
°C
125
0
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
VIK
VOH
VOL
II
IIH
IIL
IOS§
ICC
TEST CONDITIONS
VCC = 4.5 V,
VCC = 4.5 V,
II = – 18 mA
IOH = – 1 mA
VCC = 4.75 V,
VCC = 4.5 V,
IOH = – 1 mA
IOL = 20 mA
VCC = 5.5 V,
VCC = 5.5 V,
VI = 7 V
VI = 2.7 V
VCC = 5.5 V,
VCC = 5.5 V,
VI = 0.5 V
VO = 0
SN54F138
TYP‡
MAX
MIN
SN74F138
TYP‡
MAX
MIN
– 1.2
2.5
3.4
– 1.2
2.5
3.4
0.5
0.3
0.5
V
0.1
0.1
mA
20
20
µA
– 0.6
mA
–150
mA
20
mA
– 0.6
– 60
–150
– 60
VCC = 5.5 V,
See Note 2
13
20
13
‡ 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.
4
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
V
V
2.7
0.3
UNIT
SN54F138, SN74F138
3-LINE TO 8-LINE DECODERS/DEMULTIPLEXERS
SDFS051B – MARCH 1987 – REVISED JULY 1996
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†
′F138
tPLH
tPHL
A B,
A,
B or C
Y
tPLH
tPHL
G2A or G2B
Y
tPLH
tPHL
G1
Y
UNIT
SN54F138
SN74F138
MIN
TYP
MAX
MIN
MAX
MIN
MAX
2.7
5.2
7.5
2.7
12
2.7
8.5
3.2
5.7
8
3.2
9.5
3.2
9
2.7
5
7
2.7
11
2.7
8
2.2
4.9
7
2.2
8
2.2
7.5
3.2
5.8
8
3.2
12.5
3.2
9
2.7
5.2
7.5
2.7
8.5
2.7
8.5
ns
ns
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.
POST OFFICE BOX 655303
• DALLAS, TEXAS 75265
5
PACKAGE OPTION ADDENDUM
www.ti.com
22-Jul-2022
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
Samples
(4/5)
(6)
5962-9758201Q2A
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
59629758201Q2A
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
SNPB
N / A for Pkg Type
-55 to 125
JM38510/
33701B2A
Samples
JM38510/33701BEA
ACTIVE
CDIP
J
16
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
JM38510/
33701BEA
Samples
JM38510/33701BFA
ACTIVE
CFP
W
16
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
JM38510/
33701BFA
Samples
M38510/33701B2A
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
JM38510/
33701B2A
Samples
M38510/33701BEA
ACTIVE
CDIP
J
16
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
JM38510/
33701BEA
Samples
M38510/33701BFA
ACTIVE
CFP
W
16
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
JM38510/
33701BFA
Samples
SN54F138J
ACTIVE
CDIP
J
16
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
SN54F138J
Samples
SN74F138D
ACTIVE
SOIC
D
16
40
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
F138
Samples
SN74F138DR
ACTIVE
SOIC
D
16
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
F138
Samples
SN74F138DRG4
ACTIVE
SOIC
D
16
2500
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
F138
Samples
SN74F138N
ACTIVE
PDIP
N
16
25
RoHS & Green
NIPDAU
N / A for Pkg Type
0 to 70
SN74F138N
Samples
SN74F138NE4
ACTIVE
PDIP
N
16
25
RoHS & Green
NIPDAU
N / A for Pkg Type
0 to 70
SN74F138N
Samples
SN74F138NSR
ACTIVE
SO
NS
16
2000
RoHS & Green
NIPDAU
Level-1-260C-UNLIM
0 to 70
74F138
Samples
Addendum-Page 1
Samples
Samples
Samples
PACKAGE OPTION ADDENDUM
www.ti.com
22-Jul-2022
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
(3)
Device Marking
Samples
(4/5)
(6)
SNJ54F138FK
ACTIVE
LCCC
FK
20
1
Non-RoHS
& Green
SNPB
N / A for Pkg Type
-55 to 125
59629758201Q2A
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
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