74HC238; 74HCT238
3-to-8 line decoder/demultiplexer
Rev. 6 — 3 April 2020
Product data sheet
1. General description
The 74HC238; 74HCT238 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 and E2 and
E3). Every output will be LOW 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 '238 ICs
and one inverter. The '238 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
•
•
•
•
•
•
•
•
•
Demultiplexing capability
Multiple input enable for easy expansion
Ideal for memory chip select decoding
Active HIGH mutually exclusive outputs
Multiple package options
Complies with JEDEC standard no. 7A
Input levels:
• For 74HC238: CMOS level
• For 74HCT238: TTL level
ESD protection:
• HBM JESD22-A114F exceeds 2000 V
• MM JESD22-A115-A exceeds 200 V
Specified from -40 °C to +85 °C and from -40 °C to +125 °C
3. Ordering information
Table 1. Ordering information
Type number
Package
Temperature range
Name
Description
Version
-40 °C to +125 °C
SO16
plastic small outline package; 16 leads;
body width 3.9 mm
SOT109-1
74HCT238DB
-40 °C to +125 °C
SSOP16
plastic shrink small outline package; 16 leads;
body width 5.3 mm
SOT338-1
74HC238PW
-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
SOT763-1
74HC238D
74HCT238D
74HCT238PW
74HC238BQ
74HCT238BQ
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
4. Functional diagram
15
15
14
A0
1
A1
2
A2
3
E3
Fig. 1.
3 TO 8
DECODER
Y0
Y1
A0
Y2
ENABLE 12
EXITING 11
Y3
10
Y5
9
Y6
7
Y7
A1
A2
Y4
2
3
3 TO 8
DECODER
ENABLE
EXITING
E1
E2
E3
11
10
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
4
5
6
001aag753
001aag752
Logic symbol
12
7
5
6
13
1
9
4
E1
E2
13
14
Fig. 2.
Functional diagram
Y0
E1
Y1
E2
Y2
E3
Y3
Y4
Y5
A0
Y6
A1
Y7
A2
Fig. 3.
001aag754
Logic diagram
74HC_HCT238
Product data sheet
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Rev. 6 — 3 April 2020
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Nexperia B.V. 2020. All rights reserved
2 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
5. Pinning information
5.1. Pinning
1
A1
2
15 Y0
A0
1
16 VCC
A2
3
14 Y1
A1
2
15 Y0
E1
4
13 Y2
A2
3
14 Y1
E2
5
E3
6
Y7
7
12 Y3
4
13 Y2
E2
5
12 Y3
8
9
E3
6
11 Y4
GND
Y6
GND(1)
E1
Y7
7
10 Y5
GND
8
9
11 Y4
10 Y5
001aag756
Transparent top view
(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.
Y6
001aag755
Fig. 4.
A0
terminal 1
index area
74HC238
74HCT238
16 VCC
74HC238
74HCT238
Pin configuration SOT109-1 (SO16), SOT338-1
(SSOP16) and SOT403-1 (TSSOP16)
Fig. 5.
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_HCT238
Product data sheet
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Rev. 6 — 3 April 2020
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3 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
6. Functional description
Table 3. Function table
H = HIGH voltage level; L = LOW voltage level; X = don’t care.
Inputs
Outputs
E1
E2
E3
A0
A1
A2
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
H
X
X
X
X
X
L
L
L
L
L
L
L
L
X
H
X
X
X
X
L
L
L
L
L
L
L
L
X
X
L
X
X
X
L
L
L
L
L
L
L
L
L
L
H
L
L
L
H
L
L
L
L
L
L
L
L
L
H
H
L
L
L
H
L
L
L
L
L
L
L
L
H
L
H
L
L
L
H
L
L
L
L
L
L
L
H
H
H
L
L
L
L
H
L
L
L
L
L
L
H
L
L
H
L
L
L
L
H
L
L
L
L
L
H
H
L
H
L
L
L
L
L
H
L
L
L
L
H
L
H
H
L
L
L
L
L
L
H
L
L
L
H
H
H
H
L
L
L
L
L
L
L
H
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
-0.5
+7
V
VCC
supply voltage
IIK
input clamping current
VI < -0.5 V or VI > VCC + 0.5 V
[1]
-
±20
mA
IOK
output clamping current
VO < -0.5 V or VO > VCC + 0.5 V
[1]
-
±20
mA
IO
output current
-0.5 V < VO < VCC + 0.5 V
-
±25
mA
ICC
supply current
-
50
mA
IGND
ground current
-50
-
mA
Tstg
storage temperature
-65
+150
°C
Ptot
total power dissipation
-
500
mW
[1]
[2]
[2]
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
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_HCT238
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 3 April 2020
©
Nexperia B.V. 2020. All rights reserved
4 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
8. Recommended operating conditions
Table 5. Recommended operating conditions
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
74HC238
74HCT238
Unit
Min
Typ
Max
Min
Typ
Max
2.0
5.0
6.0
4.5
5.0
5.5
V
VCC
supply voltage
VI
input voltage
0
-
VCC
0
-
VCC
V
VO
output voltage
0
-
VCC
0
-
VCC
V
Tamb
ambient temperature
-40
-
+125
-40
-
+125
°C
Δt/ΔV
input transition rise and fall rate
VCC = 2.0 V
-
-
625
-
-
-
ns/V
VCC = 4.5 V
-
1.67
139
-
1.67
139
ns/V
VCC = 6.0 V
-
-
83
-
-
-
ns/V
-40 °C to
+125 °C
Unit
9. Static characteristics
Table 6. Static characteristics
At recommended operating conditions; voltages are referenced to GND (ground = 0 V).
Symbol Parameter
Conditions
25 °C
-40 °C to
+85 °C
Min
Typ
Max
Min
Max
Min
Max
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
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
VCC = 6.0 V
-
2.8
1.8
-
1.8
-
1.8
V
VI = VIH or VIL
HIGH-level
output voltage
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
IO = -5.2 mA; VCC = 6.0 V
5.48
5.81
-
5.34
-
5.2
-
V
VI = VIH or VIL
LOW-level
output voltage
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
IO = 5.2 mA; VCC = 6.0 V
-
0.16
0.26
-
0.33
-
0.4
V
-
-
±0.1
-
±1.0
-
±1.0
μA
74HC238
VIH
VIL
VOH
VOL
HIGH-level
input voltage
LOW-level
input voltage
II
input leakage
current
ICC
supply current VI = VCC or GND; IO = 0 A;
VCC = 6.0 V
-
-
8.0
-
80
-
160
μA
CI
input
capacitance
-
3.5
-
-
-
-
-
pF
74HC_HCT238
Product data sheet
VI = VCC or GND; VCC = 6.0 V
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Rev. 6 — 3 April 2020
©
Nexperia B.V. 2020. All rights reserved
5 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
Symbol Parameter
Conditions
25 °C
-40 °C to
+85 °C
-40 °C to
+125 °C
Min
Typ
Max
Min
Max
Min
Max
Unit
74HCT238
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
VOH
VI = VIH or VIL; VCC = 4.5 V
HIGH-level
output voltage
IO = -20 μA
4.4
4.5
-
4.4
-
4.4
-
V
3.98
4.32
-
3.84
-
3.7
-
V
IO = -4.0 mA
VOL
VI = VIH or VIL; VCC = 4.5 V
LOW-level
output voltage
IO = 20 μA
IO = 4.0 mA
-
0
0.1
-
0.1
-
0.1
V
-
0.16
0.26
-
0.33
-
0.4
V
II
input leakage
current
VI = VCC or GND; VCC = 5.5 V
-
-
±0.1
-
±1.0
-
±1.0
μA
ICC
supply current VI = VCC or GND; VCC = 5.5 V;
IO = 0 A
-
-
8.0
-
80
-
160
μA
ΔICC
per input pin;
additional
supply current VI = VCC - 2.1 V; IO = 0 A;
other inputs at VCC or GND;
VCC = 4.5 V to 5.5 V
An inputs
-
70
252
-
315
-
343
μA
E1, E2 inputs
-
40
144
-
180
-
196
μA
E3 input
-
145
522
-
653
-
711
μA
-
3.5
-
-
-
-
-
pF
CI
input
capacitance
74HC_HCT238
Product data sheet
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Rev. 6 — 3 April 2020
©
Nexperia B.V. 2020. All rights reserved
6 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
10. Dynamic characteristics
Table 7. Dynamic characteristics
GND = 0 V; test circuit see Fig. 8.
Symbol Parameter
Conditions
25 °C
-40 °C to
+85 °C
-40 °C to
+125 °C
Unit
Min
Typ
Max
Min
Max
Min
Max
VCC = 2.0 V
-
47
150
-
190
-
225
ns
VCC = 4.5 V
-
17
30
-
38
-
45
ns
VCC = 5.0 V; CL = 15 pF
-
14
-
-
-
-
-
ns
-
14
26
-
33
-
38
ns
VCC = 2.0 V
-
52
160
-
200
-
240
ns
VCC = 4.5 V
-
19
32
-
40
-
48
ns
VCC = 5.0 V; CL = 15 pF
-
16
-
-
-
-
-
ns
-
15
27
-
34
-
41
ns
VCC = 2.0 V
-
50
155
-
195
-
235
ns
VCC = 4.5 V
-
18
31
-
39
-
47
ns
VCC = 5.0 V; CL = 15 pF
-
17
-
-
-
-
-
ns
-
14
26
-
33
-
40
ns
VCC = 2.0 V
-
19
75
-
95
-
110
ns
VCC = 4.5 V
-
7
15
-
19
-
22
ns
VCC = 6.0 V
-
6
13
-
16
-
19
ns
-
72
-
-
-
-
-
pF
74HC238
tpd
propagation
delay
An to Yn; see Fig. 6
[1]
VCC = 6.0 V
E3 to Yn; see Fig. 6
[1]
VCC = 6.0 V
En to Yn or see Fig. 7
[1]
VCC = 6.0 V
tt
CPD
transition time see Fig. 6 and Fig. 7
power
dissipation
capacitance
74HC_HCT238
Product data sheet
[2]
per package; VI = GND to VCC [3]
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Rev. 6 — 3 April 2020
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Nexperia B.V. 2020. All rights reserved
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74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
Symbol Parameter
Conditions
25 °C
-40 °C to
+85 °C
-40 °C to
+125 °C
Unit
Min
Typ
Max
Min
Max
Min
Max
VCC = 4.5 V
-
19
35
-
44
-
53
ns
VCC = 5.0 V; CL = 15 pF
-
18
-
-
-
-
-
ns
VCC = 4.5 V
-
20
37
-
46
-
56
ns
VCC = 5.0 V; CL = 15 pF
-
20
-
-
-
-
-
ns
VCC = 4.5 V
-
20
35
-
44
-
53
ns
VCC = 5.0 V; CL = 15 pF
-
21
-
-
-
-
-
ns
74HCT238
tpd
propagation
delay
An to Yn; see Fig. 6
[1]
E3 to Yn; see Fig. 6
[1]
En to Yn or see Fig. 7
[1]
tt
transition time VCC = 4.5 V;
see Fig. 6 and Fig. 7
[2]
-
7
15
-
19
-
22
ns
CPD
power
dissipation
capacitance
[3]
-
76
-
-
-
-
-
pF
[1]
[2]
[3]
per package;
VI = GND to VCC - 1.5 V
tpd is the same as tPHL and tPLH.
tt is the same as tTHL and tTLH.
CPD is used to determine the dynamic power dissipation (PD in μW):
2
2
PD = CPD x VCC x fi x N + ∑ (CL x VCC x 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;
2
∑ (CL x VCC x fo) = sum of outputs.
10.1. Waveforms and test circuit
An, E3 input
VM
tPHL
Yn output
VY
tTHL
tPLH
VM
VX
tTLH
001aag757
Measurement points are given in Table 8.
Fig. 6.
Input (An, E3) to output (Yn) propagation delays and output transition times
74HC_HCT238
Product data sheet
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Rev. 6 — 3 April 2020
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Nexperia B.V. 2020. All rights reserved
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74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
E1, E2 input
VM
tPHL
tPLH
VY
Yn output
VM
VX
tTHL
tTLH
001aag758
Measurement points are given in Table 8.
Fig. 7.
Input (E1, E2) to output (Yn) propagation delays and output transition times
Table 8. Measurement points
Input
Type
Output
VM
VM
VX
VY
74HC238
0.5VCC
0.5VCC
0.1VCC
0.9VCC
74HCT238
1.3 V
1.3 V
0.1VCC
0.9VCC
VI
negative
pulse
tW
90 %
VM
0V
VI
positive
pulse
0V
VM
10 %
tf
tr
tr
tf
90 %
VM
VM
10 %
tW
VCC
G
VI
DUT
VCC
VO
RT
RL
S1
open
CL
001aad983
Test data is given in Table 9.
Definitions for 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.
Test circuit for measuring switching times
Table 9. Test data
Type
Input
S1 position
Load
VI
tr, tf
CL
RL
tPHL, tPLH
74HC238
VCC
6 ns
15 pF, 50 pF
1 kΩ
open
74HCT238
3V
6 ns
15 pF, 50 pF
1 kΩ
open
74HC_HCT238
Product data sheet
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Rev. 6 — 3 April 2020
©
Nexperia B.V. 2020. All rights reserved
9 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
11. 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
w M
bp
0
2.5
detail X
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
inches
0.069
0.010 0.057
0.004 0.049
0.01
0.019 0.0100 0.39
0.014 0.0075 0.38
0.16
0.15
0.05
0.039
0.016
0.028
0.020
0.01
0.01
0.004
0.028
0.012
0.244
0.041
0.228
θ
o
8
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)
74HC_HCT238
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 3 April 2020
©
Nexperia B.V. 2020. All rights reserved
10 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
SSOP16: plastic shrink small outline package; 16 leads; body width 5.3 mm
D
SOT338-1
E
A
X
c
y
HE
v M A
Z
9
16
Q
A2
A
(A 3)
A1
pin 1 index
θ
Lp
L
8
1
detail X
w M
bp
e
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A
max.
A1
A2
A3
bp
c
D (1)
E (1)
e
HE
L
Lp
Q
v
w
y
Z (1)
θ
mm
2
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
7.9
7.6
1.25
1.03
0.63
0.9
0.7
0.2
0.13
0.1
1.00
0.55
8o
0o
Note
1. Plastic or metal protrusions of 0.25 mm maximum per side are not included.
OUTLINE
VERSION
SOT338-1
REFERENCES
IEC
JEDEC
JEITA
EUROPEAN
PROJECTION
ISSUE DATE
99-12-27
03-02-19
MO-150
Fig. 10. Package outline SOT338-1 (SSOP16)
74HC_HCT238
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 3 April 2020
©
Nexperia B.V. 2020. All rights reserved
11 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
TSSOP16: plastic thin shrink small outline package; 16 leads; body width 4.4 mm
D
SOT403-1
E
A
X
c
y
HE
v M A
Z
9
16
Q
A2
pin 1 index
(A 3 )
A1
A
θ
Lp
1
L
8
detail X
w M
bp
e
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
0o
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. 11. Package outline SOT403-1 (TSSOP16)
74HC_HCT238
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 3 April 2020
©
Nexperia B.V. 2020. All rights reserved
12 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
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
B
D
A
A
E
A1
c
detail X
terminal 1
index area
terminal 1
index area
C
e1
e
b
2
7
y
y1 C
v M C A B
w M C
L
1
8
Eh
e
16
9
15
10
Dh
X
0
2.5
5 mm
scale
DIMENSIONS (mm are the original dimensions)
UNIT
A(1)
max.
A1
b
c
D (1)
Dh
E (1)
Eh
e
e1
L
v
w
y
y1
mm
1
0.05
0.00
0.30
0.18
0.2
3.6
3.4
2.15
1.85
2.6
2.4
1.15
0.85
0.5
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. 12. Package outline SOT763-1 (DHVQFN16)
74HC_HCT238
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 3 April 2020
©
Nexperia B.V. 2020. All rights reserved
13 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
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_HCT238 v.6
20200403
Product data sheet
-
Modifications:
•
•
74HC_HCT238 v.5
20180613
Modifications:
•
•
•
Type number 74HC238DB (SOT338-1) removed.
Table 4: Derating values for Ptot total power dissipation updated.
20160127
Modifications:
•
74HC_HCT238 v.3
20070716
Modifications:
•
74HC_HCT238_CNV v.2
74HC_HCT238
Product data sheet
Product data sheet
-
74HC_HCT238 v.4
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.
Fig. 3: typo corrected.
74HC_HCT238 v.4
•
•
74HC_HCT238 v.5
Product data sheet
-
74HC_HCT238 v.3
Type numbers 74HC238N and 74HCT238N (SOT38-4) removed.
Product data sheet
-
74HC_HCT238_CNV v.2
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.
Added type number 74HC238BQ and 74HCT238BQ (DHVQFN16 package)
19970828
Product specification
-
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 3 April 2020
-
©
Nexperia B.V. 2020. All rights reserved
14 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
14. Legal information
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.
Data sheet status
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.
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]
[2]
[3]
Please consult the most recently issued document before initiating or
completing a design.
The term 'short data sheet' is explained in section "Definitions".
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
74HC_HCT238
Product data sheet
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.
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 3 April 2020
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Nexperia B.V. 2020. All rights reserved
15 / 16
74HC238; 74HCT238
Nexperia
3-to-8 line decoder/demultiplexer
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: 3 April 2020
74HC_HCT238
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 3 April 2020
©
Nexperia B.V. 2020. All rights reserved
16 / 16