74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
Rev. 8 — 7 April 2020 Product data sheet
1. General description
The 74HC138; 74HCT138 decodes three binary weighted address inputs (A0, A1 and A2) to
eight mutually exclusive outputs (Y0 to Y7). The device features three enable inputs (E1, E2 and
E3). Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH. This multiple enable
function allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four '138 ICs
and one inverter. The '138 can be used as an eight output demultiplexer by using one of the active
LOW enable inputs as the data input and the remaining enable inputs as strobes. Inputs include
clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in
excess of VCC.
2. Features and benefits
•Complies with JEDEC standard no. 7A
•Input levels:
•For 74HC138: CMOS level
•For 74HCT138: TTL level
•Demultiplexing capability
•Multiple input enable for easy expansion
•Ideal for memory chip select decoding
•Active LOW mutually exclusive outputs
•ESD protection:
•HBM JESD22-A114F exceeds 2000 V
•MM JESD22-A115-A exceeds 200 V
•Multiple package options
•Specified from -40 °C to +85 °C and from -40 °C to +125 °C
3. Ordering information
Table 1. Ordering information
PackageType number
Temperature range Name Description Version
74HC138D
74HCT138D
-40 °C to +125 °C SO16 plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
74HC138DB
74HCT138DB
-40 °C to +125 °C SSOP16 plastic shrink small outline package; 16 leads;
body width 5.3 mm
SOT338-1
74HC138PW
74HCT138PW
-40 °C to +125 °C TSSOP16 plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT403-1
74HC138BQ
74HCT138BQ
-40 °C to +125 °C DHVQFN16 plastic dual in-line compatible thermal enhanced
very thin quad flat package; no leads; 16 terminals;
body 2.5 × 3.5 × 0.85 mm
SOT763-1
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
4. Functional diagram
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7 7
9
10
11
12
13
14
15A0
A1
A23
2
1
6
5
4
E2
E1
E3
mna370
Fig. 1. Logic symbol
mna372
ENABLE
EXITING
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7 7
9
10
11
12
13
14
15
A0
A1
A2
3-to-8
DECODER
3
2
1
6
5
4
E2
E1
E3
Fig. 2. Functional diagram
001aae059
Y6
Y7
E1
E2
E3
A0
A1
A2
Y4
Y5
Y2
Y3
Y0
Y1
Fig. 3. Logic diagram
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 2 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
5. Pinning information
5.1. Pinning
74HC138
74HCT138
A0 VCC
A1 Y0
A2 Y1
E1 Y2
E2 Y3
E3 Y4
Y7 Y5
GND Y6
aaa-028342
1
2
3
4
5
6
7
8
10
9
12
11
14
13
16
15
Fig. 4. Pin configuration SOT109-1
(SO16)
74HC138
74HCT138
A0 VCC
A1 Y0
A2 Y1
E1 Y2
E2 Y3
E3 Y4
Y7 Y5
GND Y6
aaa-028343
1
2
3
4
5
6
7
8
10
9
12
11
14
13
16
15
Fig. 5. Pin configuration SOT338-1
(SSOP16) and SOT403-1
(TSSOP16)
001aae060
74HC138
74HCT138
Y7 Y5
E3 Y4
E2 Y3
E1 Y2
A2 Y1
A1 Y0
GND
Y6
A
0
V
C
C
Transparent top view
7 10
6 11
5 12
4 13
3 14
2 15
8
9
1
1
6
terminal 1
index area
GND(1)
(1) This is not a ground
pin. There is no electrical
or mechanical requirement
to solder the pad. In case
soldered, the solder land
should remain floating or
connected to GND.
Fig. 6. Pin configuration SOT763-1
(DHVQFN16)
5.2. Pin description
Table 2. Pin description
Symbol Pin Description
A0, A1, A2 1, 2, 3 address input
E1, E2 4, 5 enable input (active LOW)
E3 6 enable input (active HIGH)
Y0, Y1, Y2, Y3, Y4, Y5, Y6, Y7 15, 14, 13, 12, 11, 10, 9, 7 output
GND 8 ground (0 V)
VCC 16 supply voltage
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 3 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
6. Functional description
Table 3. Function table
H = HIGH voltage level; L = LOW voltage level; X = don’t care.
Control Input Output
E1 E2 E3 A2 A1 A0 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0
H X X
X H X
XXL
XXXHHHHHHHH
L L L HHHHHHHL
L L HHHHHHHL H
L HL HHHHHL HH
L HHHHHHL HHH
HL L HHHL HHHH
HL HHHL HHHHH
HHL HL HHHHHH
LLH
HHHL HHHHHHH
7. Limiting values
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134). Voltages are referenced to GND (ground = 0 V).
Symbol Parameter Conditions Min Max Unit
VCC supply voltage -0.5 +7 V
IIK input clamping current VI < -0.5 V or VI > VCC + 0.5 V - ±20 mA
IOK output clamping current VO < -0.5 V or VO > VCC + 0.5 V - ±20 mA
IOoutput current VO = -0.5 V to (VCC + 0.5 V) - ±25 mA
ICC quiescent supply current - 50 mA
IGND ground current -50 - mA
Tstg storage temperature -65 +150 °C
Ptot total power dissipation [1] - 500 mW
[1] For SOT109-1 (SO16) package: Ptot derates linearly with 12.4 mW/K above 110 °C.
For SOT338-1 (SSOP16) package: Ptot derates linearly with 8.5 mW/K above 91 °C.
For SOT403-1 (TSSOP16) package: Ptot derates linearly with 8.5 mW/K above 91 °C.
For SOT763-1 (DHVQFN16) package: Ptot derates linearly with 11.2 mW/K above 106 °C.
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 4 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
8. Recommended operating conditions
Table 5. Recommended operating conditions
Voltages are referenced to GND (ground = 0 V)
74HC138 74HCT138Symbol Parameter Conditions
Min Typ Max Min Typ Max
Unit
VCC supply voltage 2.0 5.0 6.0 4.5 5.0 5.5 V
VIinput voltage 0 - VCC 0 - VCC V
VOoutput voltage 0 - VCC 0 - VCC V
Tamb ambient temperature -40 +25 +125 -40 +25 +125 °C
VCC = 2.0 V - - 625 - - - ns/V
VCC = 4.5 V - 1.67 139 - 1.67 139 ns/V
Δt/ΔV input transition rise and fall rate
VCC = 6.0 V - - 83 - - - ns/V
9. Static characteristics
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Tamb = 25 °C Tamb = -40 °C
to +85 °C
Tamb = -40 °C
to +125 °C
Symbol Parameter Conditions
Min Typ Max Min Max Min Max
Unit
74HC138
VCC = 2.0 V 1.5 1.2 - 1.5 - 1.5 - V
VCC = 4.5 V 3.15 2.4 - 3.15 - 3.15 - V
VIH HIGH-level
input voltage
VCC = 6.0 V 4.2 3.2 - 4.2 - 4.2 - V
VCC = 2.0 V - 0.8 0.5 - 0.5 - 0.5 V
VCC = 4.5 V - 2.1 1.35 - 1.35 - 1.35 V
VIL LOW-level
input voltage
VCC = 6.0 V - 2.8 1.8 - 1.8 - 1.8 V
VI = VIH or VIL
IO = -20 μA; VCC = 2.0 V 1.9 2.0 - 1.9 - 1.9 - V
IO = -20 μA; VCC = 4.5 V 4.4 4.5 - 4.4 - 4.4 - V
IO = -20 μA; VCC = 6.0 V 5.9 6.0 - 5.9 - 5.9 - V
IO = -4.0 mA; VCC = 4.5 V 3.98 4.32 - 3.84 - 3.7 - V
VOH HIGH-level
output voltage
IO = -5.2 mA; VCC = 6.0 V 5.48 5.81 - 5.34 - 5.2 - V
VI = VIH or VIL
IO = 20 μA; VCC = 2.0 V - 0 0.1 - 0.1 - 0.1 V
IO = 20 μA; VCC = 4.5 V - 0 0.1 - 0.1 - 0.1 V
IO = 20 μA; VCC = 6.0 V - 0 0.1 - 0.1 - 0.1 V
IO = 4.0 mA; VCC = 4.5 V - 0.15 0.26 - 0.33 - 0.4 V
VOL LOW-level
output voltage
IO = 5.2 mA; VCC = 6.0 V - 0.16 0.26 - 0.33 - 0.4 V
IIinput leakage
current
VI = VCC or GND; VCC = 6.0 V - - ±0.1 - ±1.0 - ±1.0 μA
ICC supply current VI = VCC or GND; IO = 0 A;
VCC = 6.0 V
- - 8.0 - 80 - 160 μA
CIinput
capacitance
- 3.5 - pF
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 5 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
Tamb = 25 °C Tamb = -40 °C
to +85 °C
Tamb = -40 °C
to +125 °C
Symbol Parameter Conditions
Min Typ Max Min Max Min Max
Unit
74HCT138
VIH HIGH-level
input voltage
VCC = 4.5 V to 5.5 V 2.0 1.6 - 2.0 - 2.0 - V
VIL LOW-level
input voltage
VCC = 4.5 V to 5.5 V - 1.2 0.8 - 0.8 - 0.8 V
VI = VIH or VIL; VCC = 4.5 V
IO = -20 μA 4.4 4.5 - 4.4 - 4.4 - V
VOH HIGH-level
output voltage
IO = -4 mA 3.98 4.32 - 3.84 - 3.7 - V
VI = VIH or VIL; VCC = 4.5 V
IO = 20 μA - 0 0.1 - 0.1 - 0.1 V
VOL LOW-level
output voltage
IO = 4.0 mA - 0.15 0.26 - 0.33 - 0.4 V
IIinput leakage
current
VI = VCC or GND; VCC = 5.5 V - - ±0.1 - ±1.0 - ±1.0 μA
ICC supply current VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
- - 8.0 - 80 - 160 μA
VI = VCC - 2.1 V;
other inputs at VCC or GND;
VCC = 4.5 V to 5.5 V; IO = 0 A
per input pin; An inputs - 150 540 - 675 - 735 μA
per input pin; En inputs - 125 450 - 562.5 - 612.5 μA
ΔICC additional
supply current
per input pin; E3 input - 100 360 - 450 - 490 μA
CIinput
capacitance
- 3.5 - - - - - pF
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 6 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
10. Dynamic characteristics
Table 7. Dynamic characteristics
Voltages are referenced to GND (ground = 0 V); CL = 50 pF unless otherwise specified; for test circuit see Fig. 9.
Tamb = 25 °C Tamb = -40 °C
to +85 °C
Tamb = -40 °C
to +125 °C
Symbol Parameter Conditions
Min Typ Max Min Max Min Max
Unit
74HC138
An to Yn; see Fig. 7 [1]
VCC = 2.0 V - 41 150 - 190 - 225 ns
VCC = 4.5 V - 15 30 - 38 - 45 ns
VCC = 5 V; CL = 15 pF - 12 - - - - - ns
VCC = 6.0 V - 12 26 - 33 - 38 ns
E3 to Yn; see Fig. 7 [1]
VCC = 2.0 V - 47 150 - 190 - 225 ns
VCC = 4.5 V - 17 20 - 38 - 45 ns
VCC = 5 V; CL = 15 pF - 14 - - - - - ns
VCC = 6.0 V - 14 26 - 33 - 38 ns
En to Yn; see Fig. 8 [1]
VCC = 2.0 V - 47 150 - 190 - 225 ns
VCC = 4.5 V - 17 20 - 38 - 45 ns
VCC = 5 V; CL = 15 pF - 14 - - - - - ns
tpd propagation
delay
VCC = 6.0 V - 14 26 - 33 - 38 ns
Yn; see Fig. 7 and Fig. 8 [2]
VCC = 2.0 V - 19 75 - 95 - 110 ns
VCC = 4.5 V - 7 15 - 19 - 22 ns
tttransition time
VCC = 6.0 V - 6 13 - 16 - 19 ns
CPD power
dissipation
capacitance
CL = 50 pF; f = 1 MHz;
VI = GND to VCC
[3] - 67 - - - - - pF
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 7 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
Tamb = 25 °C Tamb = -40 °C
to +85 °C
Tamb = -40 °C
to +125 °C
Symbol Parameter Conditions
Min Typ Max Min Max Min Max
Unit
74HCT138
An to Yn; see Fig. 7 [1]
VCC = 4.5 V - 20 35 - 44 - 53 ns
VCC = 5 V; CL = 15 pF - 17 - - - - - ns
E3 to Yn; see Fig. 7 [1]
VCC = 4.5 V - 18 40 - 50 - 60 ns
VCC = 5 V; CL = 15 pF - 19 - - - - - ns
En to Yn; see Fig. 8 [1]
VCC = 4.5 V - 19 40 - 50 - 60 ns
tpd propagation
delay
VCC = 5 V; CL = 15 pF - 19 - - - - - ns
Yn; see Fig. 7 and Fig. 8 [2]tttransition time
VCC = 4.5 V - 7 15 - 19 - 22 ns
CPD power
dissipation
capacitance
CL = 50 pF; f = 1 MHz;
VI = GND to VCC - 1.5 V
[3] - 67 - - - - - pF
[1] tpd is the same as tPLH and tPHL.
[2] tt is the same as tTHL and tTLH.
[3] CPD is used to determine the dynamic power dissipation (PD in μW).
PD = CPD × VCC
2 × fi × N + Σ(CL × VCC
2 × fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
Σ(CL × VCC
2 × fo) = sum of outputs.
10.1. Waveforms and test circuit
mna373
An, E3
input
Yn
output
tPHL
tTHL
tPLH
GND
VCC
VM
VM
VOH
VOL
tTLH
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig. 7. Propagation delay input (An) and enable input (E3) to output (Yn) and transition time output (Yn)
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 8 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
mna374
E1, E2
input
Yn
output
tPHL tPLH
GND
VCC
VM
VM
VOH
VOL
tTHL tTLH
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig. 8. Propagation delay enable input (En) to output (Yn) and transition time output (Yn)
Table 8. Measurement points
Input OutputType
VMVM
74HC138 0.5VCC 0.5VCC
74HCT138 1.3 V 1.3 V
Test data is given in Table 9.
Definitions test circuit:
RT = Termination resistance should be equal to output impedance Zo of the pulse generator.
CL = Load capacitance including jig and probe capacitance.
RL = Load resistance.
S1 = Test selection switch.
Fig. 9. Test circuit for measuring switching times
Table 9. Test data
Input Load S1 positionType
VItr, tfCLRLtPHL, tPLH tPZH, tPHZ tPZL, tPLZ
74HC138 VCC 6 ns 15 pF, 50 pF 1 kΩ open GND VCC
74HCT138 3 V 6 ns 15 pF, 50 pF 1 kΩ open GND VCC
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 9 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
11. Package outline
X
w M
θ
A
A
1
A
2
b
p
D
H
E
L
p
Q
detail X
E
Z
e
c
L
v M A
(A )
3
A
8
9
1
16
y
pin 1 index
UNIT A
max. A
1 A
2 A
3 b
p c D
(1) E
(1) (1)
e H
E L L
p Q Z y w v θ
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm
inches
1.75 0.25
0.10
1.45
1.25 0.25 0.49
0.36
0.25
0.19
10.0
9.8
4.0
3.8 1.27 6.2
5.8
0.7
0.6
0.7
0.3 8
0
o
o
0.25 0.1
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
1.0
0.4
SOT109-1 99-12-27
03-02-19
076E07 MS-012
0.069 0.010
0.004
0.057
0.049 0.01 0.019
0.014
0.0100
0.0075
0.39
0.38
0.16
0.15 0.05
1.05
0.041
0.244
0.228
0.028
0.020
0.028
0.012
0.01
0.25
0.01 0.004
0.039
0.016
0 2.5 5 mm
scale
SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
Fig. 10. Package outline SOT109-1 (SO16)
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 10 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
UNIT A
1 A
2 A
3 b
p c D
(1) E
(1) e H
E L L
p Q Z y w v θ
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm 0.21
0.05
1.80
1.65 0.25 0.38
0.25
0.20
0.09
6.4
6.0
5.4
5.2 0.65 1.25
7.9
7.6
1.03
0.63
0.9
0.7
1.00
0.55
8
0
o
o
0.13 0.2 0.1
DIMENSIONS (mm are the original dimensions)
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
SOT338-1 99-12-27
03-02-19
(1)
w M
b
p
D
H
E
E
Z
e
c
v M A
X
A
y
1 8
16 9
θ
A
A
1
A
2
L
p
Q
detail X
L
(A )
3
MO-150
pin 1 index
0 2.5 5 mm
scale
SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm SOT338-1
A
max.
2
Fig. 11. Package outline SOT338-1 (SSOP16)
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 11 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
UNIT A
1 A
2 A
3 b
p c D
(1) E (2) (1)
e H
E L L
p Q Z y w v θ
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm 0.15
0.05
0.95
0.80
0.30
0.19
0.2
0.1
5.1
4.9
4.5
4.3 0.65 6.6
6.2
0.4
0.3
0.40
0.06
8
0
o
o
0.13 0.1 0.2 1
DIMENSIONS (mm are the original dimensions)
Notes
1. Plastic or metal protrusions of 0.15 mm maximum per side are not included.
2. Plastic interlead protrusions of 0.25 mm maximum per side are not included.
0.75
0.50
SOT403-1 MO-153 99-12-27
03-02-18
w M
b
p
D
Z
e
0.25
1 8
16 9
θ
A
A
1
A
2
L
p
Q
detail X
L
(A )
3
H
E
E
c
v M A
X
A
y
0 2.5 5 mm
scale
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm SOT403-1
A
max.
1.1
pin 1 index
Fig. 12. Package outline SOT403-1 (TSSOP16)
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 12 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
terminal 1
index area
0.5 1
A1 Eh
b
UNIT y e
0.2
c
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC JEITA
mm 3.6
3.4
Dh
2.15
1.85
y1
2.6
2.4
1.15
0.85
e1
2.5
0.30
0.18
0.05
0.00 0.05 0.1
DIMENSIONS (mm are the original dimensions)
SOT763-1 MO-241 - - - - - -
0.5
0.3
L
0.1
v
0.05
w
0 2.5 5 mm
scale
SOT763-1
DHVQFN16: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads;
16 terminals; body 2.5 x 3.5 x 0.85 mm
A(1)
max.
A
A1
c
detail X
y
y1 C
e
L
Eh
Dh
e
e1
b
2 7
15 10
9
8
1
16
X
D
E
C
B A
terminal 1
index area
A C
C
B
v M
w M
E
(1)
Note
1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.
D
(1)
02-10-17
03-01-27
Fig. 13. Package outline SOT763-1 (DHVQFN16)
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 13 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
12. Abbreviations
Table 10. Abbreviations
Acronym Description
CMOS Complementary Metal-Oxide Semiconductor
DUT Device Under Test
ESD ElectroStatic Discharge
HBM Human Body Model
MM Machine Model
TTL Transistor-Transistor Logic
13. Revision history
Table 11. Revision history
Document ID Release date Data sheet status Change notice Supersedes
74HC_HCT138 v.8 20200407 Product data sheet - 74HC_HCT138 v.7
Modifications: •Fig. 6 corrected (Errata).
•Table 4: Derating values for Ptot total power dissipation updated.
74HC_HCT138 v.7 20180326 Product data sheet - 74HC_HCT138 v.6
Modifications: •The format of this data sheet has been redesigned to comply with the identity guidelines
of Nexperia.
•Legal texts have been adapted to the new company name where appropriate.
74HC_HCT138 v.6 20151228 Product data sheet - 74HC_HCT138 v.5
Modifications: •Type numbers 74HC138N and 74HCT138N (SOT38-4) removed.
74HC_HCT138 v.5 20150126 Product data sheet - 74HC_HCT138 v.4
Modifications: •Section 9: OFF-state output current removed because device has no 3-state outputs.
•Section 10: Power dissipation capacitance condition for 74HCT138 is corrected.
74HC_HCT138 v.4 20120627 Product data sheet - 74HC_HCT138 v.3
Modifications: •The format of this data sheet has been redesigned to comply with the new identity
guidelines of NXP Semiconductors.
•Legal texts have been adapted to the new company name where appropriate.
•SOT38-1 changed to SOT38-4.
74HC_HCT138 v.3 20051223 Product data sheet - 74HC_HCT138_CNV v.2
Modifications: •The format of this data sheet has been redesigned to comply with the new presentation
and information standard of Philips Semiconductors.
•Section 3, Section 5 and Section 11: Added DHVQFN package information
•Section 9: Added from the family specification
74HC_HCT138_CNV v.2 19970827 Product specification - -
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 14 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
14. Legal information
Data sheet status
Document status
[1][2]
Product
status [3]
Definition
Objective [short]
data sheet
Development This document contains data from
the objective specification for
product development.
Preliminary [short]
data sheet
Qualification This document contains data from
the preliminary specification.
Product [short]
data sheet
Production This document contains the product
specification.
[1] Please consult the most recently issued document before initiating or
completing a design.
[2] The term 'short data sheet' is explained in section "Definitions".
[3] The product status of device(s) described in this document may have
changed since this document was published and may differ in case of
multiple devices. The latest product status information is available on
the internet at https://www.nexperia.com.
Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. Nexperia does not give any representations or
warranties as to the accuracy or completeness of information included herein
and shall have no liability for the consequences of use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is
intended for quick reference only and should not be relied upon to contain
detailed and full information. For detailed and full information see the relevant
full data sheet, which is available on request via the local Nexperia sales
office. In case of any inconsistency or conflict with the short data sheet, the
full data sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
Nexperia and its customer, unless Nexperia and customer have explicitly
agreed otherwise in writing. In no event however, shall an agreement be
valid in which the Nexperia product is deemed to offer functions and qualities
beyond those described in the Product data sheet.
Disclaimers
Limited warranty and liability — Information in this document is believed
to be accurate and reliable. However, Nexperia does not give any
representations or warranties, expressed or implied, as to the accuracy
or completeness of such information and shall have no liability for the
consequences of use of such information. Nexperia takes no responsibility
for the content in this document if provided by an information source outside
of Nexperia.
In no event shall Nexperia be liable for any indirect, incidental, punitive,
special or consequential damages (including - without limitation - lost
profits, lost savings, business interruption, costs related to the removal
or replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, Nexperia’s aggregate and cumulative liability towards customer
for the products described herein shall be limited in accordance with the
Terms and conditions of commercial sale of Nexperia.
Right to make changes — Nexperia reserves the right to make changes
to information published in this document, including without limitation
specifications and product descriptions, at any time and without notice. This
document supersedes and replaces all information supplied prior to the
publication hereof.
Suitability for use — Nexperia products are not designed, authorized or
warranted to be suitable for use in life support, life-critical or safety-critical
systems or equipment, nor in applications where failure or malfunction
of an Nexperia product can reasonably be expected to result in personal
injury, death or severe property or environmental damage. Nexperia and its
suppliers accept no liability for inclusion and/or use of Nexperia products in
such equipment or applications and therefore such inclusion and/or use is at
the customer’s own risk.
Quick reference data — The Quick reference data is an extract of the
product data given in the Limiting values and Characteristics sections of this
document, and as such is not complete, exhaustive or legally binding.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. Nexperia makes no representation
or warranty that such applications will be suitable for the specified use
without further testing or modification.
Customers are responsible for the design and operation of their applications
and products using Nexperia products, and Nexperia accepts no liability for
any assistance with applications or customer product design. It is customer’s
sole responsibility to determine whether the Nexperia product is suitable
and fit for the customer’s applications and products planned, as well as
for the planned application and use of customer’s third party customer(s).
Customers should provide appropriate design and operating safeguards to
minimize the risks associated with their applications and products.
Nexperia does not accept any liability related to any default, damage, costs
or problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party
customer(s). Customer is responsible for doing all necessary testing for the
customer’s applications and products using Nexperia products in order to
avoid a default of the applications and the products or of the application or
use by customer’s third party customer(s). Nexperia does not accept any
liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those
given in the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — Nexperia products are
sold subject to the general terms and conditions of commercial sale, as
published at http://www.nexperia.com/profile/terms, unless otherwise agreed
in a valid written individual agreement. In case an individual agreement is
concluded only the terms and conditions of the respective agreement shall
apply. Nexperia hereby expressly objects to applying the customer’s general
terms and conditions with regard to the purchase of Nexperia products by
customer.
No offer to sell or license — Nothing in this document may be interpreted
or construed as an offer to sell products that is open for acceptance or the
grant, conveyance or implication of any license under any copyrights, patents
or other industrial or intellectual property rights.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Non-automotive qualified products — Unless this data sheet expressly
states that this specific Nexperia product is automotive qualified, the
product is not suitable for automotive use. It is neither qualified nor tested in
accordance with automotive testing or application requirements. Nexperia
accepts no liability for inclusion and/or use of non-automotive qualified
products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards,
customer (a) shall use the product without Nexperia’s warranty of the
product for such automotive applications, use and specifications, and (b)
whenever customer uses the product for automotive applications beyond
Nexperia’s specifications such use shall be solely at customer’s own risk,
and (c) customer fully indemnifies Nexperia for any liability, damages or failed
product claims resulting from customer design and use of the product for
automotive applications beyond Nexperia’s standard warranty and Nexperia’s
product specifications.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
Trademarks
Notice: All referenced brands, product names, service names and
trademarks are the property of their respective owners.
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 15 / 16
Nexperia 74HC138; 74HCT138
3-to-8 line decoder/demultiplexer; inverting
Contents
1. General description......................................................1
2. Features and benefits.................................................. 1
3. Ordering information....................................................1
4. Functional diagram.......................................................2
5. Pinning information......................................................3
5.1. Pinning.........................................................................3
5.2. Pin description............................................................. 3
6. Functional description................................................. 4
7. Limiting values............................................................. 4
8. Recommended operating conditions..........................5
9. Static characteristics....................................................5
10. Dynamic characteristics............................................ 7
10.1. Waveforms and test circuit........................................ 8
11. Package outline........................................................ 10
12. Abbreviations............................................................ 14
13. Revision history........................................................14
14. Legal information......................................................15
© Nexperia B.V. 2020. All rights reserved
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
Date of release: 7 April 2020
74HC_HCT138 All information provided in this document is subject to legal disclaimers. © Nexperia B.V. 2020. All rights reserved
Product data sheet Rev. 8 — 7 April 2020 16 / 16