74AHC138; 74AHCT138
3-to-8 line decoder/demultiplexer; inverting
Rev. 4 — 2 April 2014
Product data sheet
1. General description
The 74AHC138; 74AHCT138 are high-speed Si-gate CMOS devices and are pin
compatible with Low power Schottky TTL (LSTTL). They are specified in compliance with
JEDEC standard No. 7A.
The 74AHC138; 74AHCT138 is a 3-to-8 line decoder/demultiplexer. It accepts three
binary weighted address inputs (A0, A1 and A2) and, when enabled, provides eight
mutually exclusive outputs (Y0 to Y7) that are LOW when selected.
There are three enable inputs: two active LOW (E1 and E2) and one active HIGH (E3).
Every output will be HIGH unless E1 and E2 are LOW and E3 is HIGH.
This multiple enable function allows easy parallel expansion of the device to a 1-of-32
(5 lines to 32 lines) decoder with just four 74AHC138; 74AHCT138 devices and one
inverter. The 74AHC138; 74AHCT138 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. Unused enable inputs must be permanently tied to their appropriate
active HIGH or LOW state.
2. Features and benefits
Balanced propagation delays
All inputs have Schmitt-trigger action
Demultiplexing capability
Multiple input enable for easy expansion
Ideal for memory chip select decoding
Inputs accepts voltages higher than VCC
For 74AHC138 only: operates with CMOS input levels
For 74AHCT138 only: operates with TTL input levels
ESD protection:
HBM JESD22-A114E exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
CDM JESD22-C101C exceeds 1000 V
Multiple package options
Specified from 40 C to +85 C and from 40 C to +125 C
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
3. Ordering information
Table 1.
Ordering information
Type number
Package
74AHC138D
Temperature range
Name
Description
Version
40 C to +125 C
SO16
plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
40 C to +125 C
TSSOP16
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
SOT403-1
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
74AHCT138D
74AHC138PW
74AHCT138PW
74AHC138BQ
74AHCT138BQ
SOT763-1
4. Functional diagram
DX
1
A0
1
Y0
A1
Y1
14
3
A2
Y2
13
Y3
12
E1
Y4
11
E2
Y5
10
E3
Y6
9
Y7
7
4
5
6
3
G
0
7
2
2
3
4
4
&
5
5
6
6
7
14
1
13
2
12
3
1
1
2
2
4
3
11
4
10
4
9
5
7
0
&
5
6
EN
6
7
15
14
13
12
11
10
9
7
mna371
Logic symbol
Fig 2.
(b)
IEC logic symbol
Y0
15
1
A0
Y1
14
2
A1
Y2
13
3
A2
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
3-to-8
DECODER
4
X/Y
15
(a)
mna370
Fig 1.
1
2
15
2
0
0
ENABLE
EXITING
E1
5
E2
6
E3
mna372
Fig 3.
Functional diagram
74AHC_AHCT138
Product data sheet
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Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
2 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
5. Pinning information
A0
terminal 1
index area
16 VCC
5.1 Pinning
1
16 VCC
A1
2
15 Y0
A1
2
15 Y0
A2
3
14 Y1
A2
3
14 Y1
E1
4
13 Y2
E1
4
1
A0
E3
6
11 Y4
Y7
7
10 Y5
GND
8
9
E2
5
E3
6
Y7
7
Y6
GND(1)
12 Y3
11 Y4
10 Y5
9
12 Y3
Y6
5
8
E2
13 Y2
138
GND
138
001aad035
Transparent top view
001aad033
(1) The die substrate is attached to this pad using
conductive die attach material. It can not be used as a
supply pin or input.
Fig 4.
Pin configuration for SO16 and TSSOP16
Fig 5.
Pin configuration for DHVQFN16
5.2 Pin description
Table 2.
Pin description
Symbol
Pin
Description
A0
1
address input
A1
2
address input
A2
3
address input
E1
4
enable input (active LOW)
E2
5
enable input (active LOW)
E3
6
enable input (active HIGH)
GND
8
ground (0 V)
Y0 to Y7
15, 14, 13, 12, 11, 10, 9, 7
output
VCC
16
supply voltage
74AHC_AHCT138
Product data sheet
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Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
3 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
6. Functional description
Function table [1]
Table 3.
Input
Output
E1
E2
E3
A0
A1
A2
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
H
X
X
X
X
X
H
H
H
H
H
H
H
H
X
H
X
X
X
X
H
H
H
H
H
H
H
H
X
X
L
X
X
X
H
H
H
H
H
H
H
H
L
L
H
L
L
L
L
H
H
H
H
H
H
H
L
L
H
H
L
L
H
L
H
H
H
H
H
H
L
L
H
L
H
L
H
H
L
H
H
H
H
H
L
L
H
H
H
L
H
H
H
L
H
H
H
H
L
L
H
L
L
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
L
H
H
H
H
H
H
H
H
L
H
L
L
H
H
H
H
H
H
H
H
H
H
H
L
[1]
H = HIGH voltage level; L = LOW voltage level; X = don’t care
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
+7.0
V
VI
input voltage
IIK
input clamping current
VI < 0.5 V
[1]
0.5
+7.0
V
20
-
IOK
output clamping current
VO < 0.5 V or VO > VCC + 0.5 V
[1]
mA
-
20
mA
IO
output current
VO = 0.5 V to (VCC + 0.5 V)
-
25
mA
ICC
IGND
supply current
-
75
mA
ground current
75
-
mA
Tstg
storage temperature
65
+150
C
Ptot
total power dissipation
Tamb = 40 C to +125 C
SO16 package
[2]
-
500
mW
TSSOP16 package
[3]
-
500
mW
DHVQFN16 package
[4]
-
500
mW
[1]
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
[2]
Ptot derates linearly with 8 mW/K above 70 C.
[3]
Ptot derates linearly with 5.5 mW/K above 60 C.
[4]
Ptot derates linearly with 4.5 mW/K above 60 C.
74AHC_AHCT138
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
4 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
8. Recommended operating conditions
Table 5.
Recommended operating conditions
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
74AHC138
Min
74AHCT138
Typ
Max
Min
Unit
Typ
Max
VCC
supply voltage
2.0
5.0
5.5
4.5
5.0
5.5
V
VI
input voltage
0
-
5.5
0
-
5.5
V
VO
output voltage
0
-
VCC
0
-
VCC
V
Tamb
ambient temperature
40
+25
+125
40
+25
+125
C
t/V
input transition rise
and fall rate
VCC = 3.3 V 0.3 V
-
-
100
-
-
-
ns/V
VCC = 5.0 V 0.5 V
-
-
20
-
-
20
ns/V
9. Static characteristics
Table 6.
Static characteristics
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
25 C
Conditions
40 C to +85 C 40 C to +125 C Unit
Min
Typ
Max
Min
Max
Min
Max
VCC = 2.0 V
1.5
-
-
1.5
-
1.5
-
V
VCC = 3.0 V
2.1
-
-
2.1
-
2.1
-
V
VCC = 5.5 V
3.85
-
-
3.85
-
3.85
-
V
For type 74AHC138
VIH
VIL
VOH
VOL
HIGH-level
input voltage
LOW-level
input voltage
VCC = 2.0 V
-
-
0.5
-
0.5
-
0.5
V
VCC = 3.0 V
-
-
0.9
-
0.9
-
0.9
V
VCC = 5.5 V
-
-
1.65
-
1.65
-
1.65
V
HIGH-level
VI = VIH or VIL
output voltage
IO = 50 A; VCC = 2.0 V
1.9
2.0
-
1.9
-
1.9
-
V
IO = 50 A; VCC = 3.0 V
2.9
3.0
-
2.9
-
2.9
-
V
IO = 50 A; VCC = 4.5 V
4.4
4.5
-
4.4
-
4.4
-
V
IO = 4.0 mA; VCC = 3.0 V
2.58
-
-
2.48
-
2.4
-
V
IO = 8.0 mA; VCC = 4.5 V
3.94
-
-
3.8
-
3.7
-
V
LOW-level
VI = VIH or VIL
output voltage
IO = 50 A; VCC = 2.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 50 A; VCC = 3.0 V
-
0
0.1
-
0.1
-
0.1
V
IO = 50 A; VCC = 4.5 V
-
0
0.1
-
0.1
-
0.1
V
IO = 4.0 mA; VCC = 3.0 V
-
-
0.36
-
0.44
-
0.55
V
IO = 8.0 mA; VCC = 4.5 V
-
-
0.36
-
0.44
-
0.55
V
-
-
0.1
-
1.0
-
2.0
A
II
input leakage
current
ICC
supply current VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
-
-
4.0
-
40
-
80
A
CI
input
capacitance
-
3.0
10
-
10
-
10
pF
74AHC_AHCT138
Product data sheet
VI = 5.5 V or GND;
VCC = 0 V or 5.5 V
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
5 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
Table 6.
Static characteristics …continued
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
25 C
Conditions
40 C to +85 C 40 C to +125 C Unit
Min
Typ
Max
Min
Max
Min
Max
For type 74AHCT138
VIH
HIGH-level
input voltage
VCC = 4.5 V to 5.5 V
2.0
-
-
2.0
-
2.0
-
V
VIL
LOW-level
input voltage
VCC = 4.5 V to 5.5 V
-
-
0.8
-
0.8
-
0.8
V
VOH
HIGH-level
VI = VIH or VIL; VCC = 4.5 V
output voltage
IO = 50 A
4.4
4.5
-
4.4
-
4.4
-
V
3.94
-
-
3.8
-
3.7
-
V
IO = 8.0 mA
VOL
LOW-level
VI = VIH or VIL; VCC = 4.5 V
output voltage
IO = 50 A
IO = 8.0 mA
0
0.1
-
0.1
-
0.1
V
-
0.36
-
0.44
-
0.55
V
-
-
0.1
-
1.0
-
2.0
A
II
input leakage
current
ICC
supply current VI = VCC or GND; IO = 0 A;
VCC = 5.5 V
-
-
4.0
-
40
-
80
A
ICC
additional
per input pin;
supply current VI = VCC 2.1 V; IO = 0 A;
other pins at VCC or GND;
VCC = 4.5 V to 5.5 V
-
-
1.35
-
1.5
-
1.5
mA
CI
input
capacitance
-
3.0
10
-
10
-
10
pF
74AHC_AHCT138
Product data sheet
VI = 5.5 V or GND;
VCC = 0 V or 5.5 V
-
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Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
6 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
10. Dynamic characteristics
Table 7.
Dynamic characteristics
GND = 0 V; For test circuit see Figure 8.
Symbol Parameter
25 C
Conditions
40 C to +85 C 40 C to +125 C Unit
Min
Typ[1]
Max
Min
Max
Min
Max
CL = 15 pF
-
6.0
11.4
1.0
13.0
1.0
14.5
ns
CL = 50 pF
-
8.6
15.8
1.0
18.0
1.0
20.0
ns
-
4.4
8.1
1.0
9.5
1.0
10.5
ns
-
6.3
10.1
1.0
11.5
1.0
13.0
ns
CL = 15 pF
-
5.8
12.8
1.0
15.0
1.0
16.0
ns
CL = 50 pF
-
8.2
16.3
1.0
18.5
1.0
20.5
ns
-
4.2
8.1
1.0
9.5
1.0
10.5
ns
-
6.0
10.1
1.0
11.5
1.0
13.0
ns
CL = 15 pF
-
5.7
11.4
1.0
13.5
1.0
14.5
ns
CL = 50 pF
-
8.2
14.9
1.0
17.0
1.0
19.0
ns
CL = 15 pF
-
4.2
8.1
1.0
9.5
1.0
10.5
ns
CL = 50 pF
-
6.0
10.1
1.0
11.5
1.0
13.0
ns
-
18.0
-
-
-
-
-
pF
For type 74AHC138
tpd
propagation
delay
An to Yn; see Figure 6
[2]
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
CL = 15 pF
CL = 50 pF
E3 to Yn; see Figure 6
[2]
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
CL = 15 pF
CL = 50 pF
E1, E2 to Yn; see Figure 7
[2]
VCC = 3.0 V to 3.6 V
VCC = 4.5 V to 5.5 V
CPD
power
dissipation
capacitance
74AHC_AHCT138
Product data sheet
CL = 50 pF; fi = 1 MHz;
VI = GND to VCC
[4]
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
7 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
Table 7.
Dynamic characteristics …continued
GND = 0 V; For test circuit see Figure 8.
Symbol Parameter
25 C
Conditions
40 C to +85 C 40 C to +125 C Unit
Min
Typ[1]
Max
Min
Max
Min
Max
-
4.4
10.4
1.0
12.0
1.0
13.0
ns
-
6.2
11.4
1.0
13.0
1.0
14.5
ns
-
4.3
9.1
1.0
10.5
1.0
11.5
ns
-
6.2
10.1
1.0
11.5
1.0
13.0
ns
-
4.3
9.6
1.0
11.0
1.0
12.0
ns
-
6.2
10.6
1.0
12.0
1.0
13.5
ns
-
23.0
-
-
-
-
-
pF
For type 74AHCT138
propagation
delay
tpd
An to Yn; see Figure 6
[2]
VCC = 4.5 V to 5.5 V
CL = 15 pF
CL = 50 pF
E3 to Yn; see Figure 6
[2]
VCC = 4.5 V to 5.5 V
CL = 15 pF
CL = 50 pF
E1, E2 to Yn; see Figure 7
[2]
VCC = 4.5 V to 5.5 V
CL = 15 pF
CL = 50 pF
power
dissipation
capacitance
CPD
CL = 50 pF; fi = 1 MHz;
VI = GND to VCC
[4]
[1]
Typical values are measured at nominal supply voltage (VCC = 3.3 V and VCC = 5.0 V).
[2]
tpd is the same as tPLH and tPHL.
[3]
Skew between any two outputs of the same package switching in the same direction. This parameter is guaranteed by design.
[4]
CPD is used to determine the dynamic power dissipation (PD in W).
PD = CPD VCC2 fi N + (CL VCC2 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
(CL VCC2 fo) = sum of the outputs.
11. Waveforms
VCC
An, E3 input
VM
GND
tPHL
tPLH
VOH
Yn output
VM
VOL
001aah080
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 6.
The inputs An, E3 to outputs Yn propagation delays
74AHC_AHCT138
Product data sheet
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Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
8 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
VCC
E1, E2 input
VM
GND
tPHL
tPLH
VOH
Yn output
VM
VOL
001aah081
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 7.
The inputs En to outputs Yn propagation delays
Table 8.
Measurement points
Type
Input
Output
VM
VM
74AHC138
0.5VCC
0.5VCC
74AHCT138
1.5 V
0.5VCC
74AHC_AHCT138
Product data sheet
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Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
9 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
VI
tW
90 %
negative
pulse
VM
0V
tf
tr
tr
tf
VI
90 %
positive
pulse
0V
VM
10 %
VM
VM
10 %
tW
VCC
VCC
VI
G
VO
RL
S1
open
DUT
CL
RT
001aad983
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 8.
Load circuit for switching times
Table 9.
Test data
Type
Input
Load
S1 position
VI
tr, tf
CL
RL
tPHL, tPLH
tPZH, tPHZ
tPZL, tPLZ
74AHC138
VCC
3.0 ns
15 pF, 50 pF
1 k
open
GND
VCC
74AHCT138
3.0 V
3.0 ns
15 pF, 50 pF
1 k
open
GND
VCC
74AHC_AHCT138
Product data sheet
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Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
10 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
12. Package outline
SO16: plastic small outline package; 16 leads; body width 3.9 mm
SOT109-1
D
E
A
X
c
y
HE
v M A
Z
16
9
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
1
L
8
e
0
detail X
w M
bp
2.5
5 mm
scale
DIMENSIONS (inch dimensions are derived from the original mm dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
Z (1)
mm
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
1.05
1.0
0.4
0.7
0.6
0.25
0.25
0.1
0.7
0.3
0.01
0.019 0.0100 0.39
0.014 0.0075 0.38
0.039
0.016
0.028
0.020
inches
0.010 0.057
0.069
0.004 0.049
0.16
0.15
0.05
0.244
0.041
0.228
0.01
0.01
0.028
0.004
0.012
θ
8o
o
0
Note
1. Plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included.
Fig 9.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
SOT109-1
076E07
MS-012
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
Package outline SOT109-1 (SO16)
74AHC_AHCT138
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
11 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
SOT403-1
E
D
A
X
c
y
HE
v M A
Z
9
16
Q
(A 3)
A2
A
A1
pin 1 index
θ
Lp
L
1
8
e
detail X
w M
bp
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (2)
e
HE
L
Lp
Q
v
w
y
Z (1)
θ
mm
1.1
0.15
0.05
0.95
0.80
0.25
0.30
0.19
0.2
0.1
5.1
4.9
4.5
4.3
0.65
6.6
6.2
1
0.75
0.50
0.4
0.3
0.2
0.13
0.1
0.40
0.06
8o
o
0
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.
OUTLINE
VERSION
SOT403-1
REFERENCES
IEC
JEDEC
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-18
MO-153
Fig 10. Package outline SOT403-1 (TSSOP16)
74AHC_AHCT138
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
12 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
DHVQFN16: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads;
SOT763-1
16 terminals; body 2.5 x 3.5 x 0.85 mm
A
B
D
A
A1
E
c
detail X
terminal 1
index area
terminal 1
index area
C
e1
e
2
7
y
y1 C
v M C A B
w M C
b
L
1
8
Eh
e
16
9
15
10
Dh
X
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
mm
A(1)
max.
A1
b
1
0.05
0.00
0.30
0.18
c
D (1)
Dh
E (1)
Eh
0.2
3.6
3.4
2.15
1.85
2.6
2.4
1.15
0.85
e
0.5
e1
L
v
w
y
y1
2.5
0.5
0.3
0.1
0.05
0.05
0.1
Note
1. Plastic or metal protrusions of 0.075 mm maximum per side are not included.
REFERENCES
OUTLINE
VERSION
IEC
JEDEC
JEITA
SOT763-1
---
MO-241
---
EUROPEAN
PROJECTION
ISSUE DATE
02-10-17
03-01-27
Fig 11. Package outline SOT763-1 (DHVQFN16)
74AHC_AHCT138
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
13 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
13. Abbreviations
Table 10.
Abbreviations
Acronym
Description
CMOS
Complementary Metal Oxide Semiconductor
LSTTL
Low-power Schottky Transistor-Transistor Logic
ESD
ElectroStatic Discharge
HBM
Human Body Model
MM
Machine Model
CDM
Charged-Device Model
TTL
Transistor-Transistor Logic
14. Revision history
Table 11.
Revision history
Document ID
Release date
Data sheet status
Change notice
Supersedes
74AHC_AHCT138 v.4
20140402
Product data sheet
-
74AHC_AHCT138 v.3
Modifications:
•
Description for tpd for the 74AHCT138 corrected (errata) in Table 7 “Dynamic characteristics”
74AHC_AHCT138 v.3
20071128
Product data sheet
74AHC_AHCT138 v.2
19990927
Product specification
-
74AHC_AHCT138 v.1
74AHC_AHCT138 v.1
19900331
Product specification
-
-
74AHC_AHCT138
Product data sheet
-
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 2 April 2014
74AHC_AHCT138 v.2
©
Nexperia B.V. 2017. All rights reserved
14 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
15. Legal information
15.1 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 URL http://www.nexperia.com.
15.2 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.
15.3 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.
74AHC_AHCT138
Product data sheet
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 a 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.
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.
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
15 of 17
74AHC138; 74AHCT138
Nexperia
3-to-8 line decoder/demultiplexer; inverting
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.
15.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
16. Contact information
For more information, please visit: http://www.nexperia.com
For sales office addresses, please send an email to: salesaddresses@nexperia.com
74AHC_AHCT138
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 2 April 2014
©
Nexperia B.V. 2017. All rights reserved
16 of 17
Nexperia
74AHC138; 74AHCT138
3-to-8 line decoder/demultiplexer; inverting
17. Contents
1
2
3
4
5
5.1
5.2
6
7
8
9
10
11
12
13
14
15
15.1
15.2
15.3
15.4
16
17
©
General description . . . . . . . . . . . . . . . . . . . . . . 1
Features and benefits . . . . . . . . . . . . . . . . . . . . 1
Ordering information . . . . . . . . . . . . . . . . . . . . . 2
Functional diagram . . . . . . . . . . . . . . . . . . . . . . 2
Pinning information . . . . . . . . . . . . . . . . . . . . . . 3
Pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . 3
Functional description . . . . . . . . . . . . . . . . . . . 4
Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 4
Recommended operating conditions. . . . . . . . 5
Static characteristics. . . . . . . . . . . . . . . . . . . . . 5
Dynamic characteristics . . . . . . . . . . . . . . . . . . 7
Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Package outline . . . . . . . . . . . . . . . . . . . . . . . . 11
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Revision history . . . . . . . . . . . . . . . . . . . . . . . . 14
Legal information. . . . . . . . . . . . . . . . . . . . . . . 15
Data sheet status . . . . . . . . . . . . . . . . . . . . . . 15
Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Contact information. . . . . . . . . . . . . . . . . . . . . 16
Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Nexperia B.V. 2017. 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: 02 April 2014