74HC238-Q100; 74HCT238-Q100
3-to-8 line decoder/demultiplexer
Rev. 1 — 19 February 2013
Product data sheet
1. General description
The 74HC_HCT238_Q100 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 is 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 74HC_HCT238_Q100 ICs and one inverter. The
74HC_HCT238_Q100 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 that enable the use of current limiting resistors to interface
inputs to voltages in excess of V
CC
.
This product has been qualified to the Automotive Electronics Council (AEC) standard
Q100 (Grade 1) and is suitable for use in automotive applications.
2. Features and benefits
Automotive product qualification in accordance with AEC-Q100 (Grade 1)
Specified from
40 C
to +85
C
and from
40 C
to +125
C
Input levels:
For 74HC238-Q100: CMOS level
For 74HCT238-Q100: TTL level
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
ESD protection:
MIL-STD-883, method 3015 exceeds 2000 V
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V (C = 200 pF, R = 0
)
Nexperia
74HC238-Q100; 74HCT238-Q100
3-to-8 line decoder/demultiplexer
3. Ordering information
Table 1.
Ordering information
Package
Temperature
range
74HC238D-Q100
74HC238PW-Q100
74HC238BQ-Q100
40 C
to +125
C
40 C
to +125
C
40 C
to +125
C
Name
SO16
TSSOP16
DHVQFN16
Description
plastic small outline package; 16 leads;
body width 3.9 mm
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
plastic dual in-line compatible thermal enhanced
very thin quad flat package; no leads; 16 terminals;
body 2.5
3.5
0.85 mm
plastic small outline package; 16 leads;
body width 3.9 mm
plastic thin shrink small outline package; 16 leads;
body width 4.4 mm
plastic dual in-line compatible thermal enhanced
very thin quad flat package; no leads; 16 terminals;
body 2.5
3.5
0.85 mm
Version
SOT109-1
SOT403-1
SOT763-1
Type number
74HCT238D-Q100
40 C
to +125
C
SO16
TSSOP16
DHVQFN16
SOT109-1
SOT403-1
SOT763-1
74HCT238PW-Q100
40 C
to +125
C
74HCT238BQ-Q100
40 C
to +125
C
4. Functional diagram
15
15
14
A0
A1
A2
1
2
3
3 TO 8
DECODER
13
ENABLE 12
EXITING 11
10
9
7
E1
E2
E3
4
5
6
001aag752
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
E1
E2
E3
4
5
6
A0
A1
A2
1
2
3
3 TO 8
DECODER
ENABLE
EXITING
14
13
12
11
10
9
7
001aag753
Fig 1.
Logic symbol
Fig 2.
Functional diagram
74HC_HCT238_Q100
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 1 — 19 February 2013
2 of 17
Nexperia
74HC238-Q100; 74HCT238-Q100
3-to-8 line decoder/demultiplexer
Y0
E1
E2
E3
Y1
Y2
Y3
Y4
Y5
A0
Y6
A1
A2
Y7
001aag754
Fig 3.
Logic diagram
5. Pinning information
5.1 Pinning
+&4
+&74
$
$
$
(
(
(
<
*1'
DDD
+&4
+&74
9
&&
<
<
<
<
<
<
<
WHUPLQDO
LQGH[ DUHD
$
$
(
(
(
<
9
&&
<
<
<
<
<
<
*1'
*1'
$
<
DDD
©
7UDQVSDUHQW WRS YLHZ
(1) This is not a supply pin. The substrate is attached to this
pad using conductive die attach material. There is no
electrical or mechanical requirement to solder this pad.
However, if it is soldered, the solder land should remain
floating or be connected to GND.
Fig 4.
Pin configuration SO16 and TSSOP16
Fig 5.
Pin configuration DHVQFN16
74HC_HCT238_Q100
All information provided in this document is subject to legal disclaimers.
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 1 — 19 February 2013
3 of 17
Nexperia
74HC238-Q100; 74HCT238-Q100
3-to-8 line decoder/demultiplexer
5.2 Pin description
Table 2.
Symbol
A[0:2]
E1
E2
E3
Y[0:7]
GND
V
CC
Pin description
Pin
1, 2, 3
4
5
6
15, 14, 13, 12, 11, 10, 9, 7
8
16
Description
address input
enable input (active LOW)
enable input (active LOW)
enable input (active HIGH)
output (active HIGH)
ground (0 V)
supply voltage
6. Functional description
Table 3.
Inputs
E1
H
X
X
L
L
L
L
L
L
L
L
[1]
Function table
[1]
Outputs
E2
X
H
X
L
L
L
L
L
L
L
L
E3
X
X
L
H
H
H
H
H
H
H
H
A0
X
X
X
L
H
L
H
L
H
L
H
A1
X
X
X
L
L
H
H
L
L
H
H
A2
X
X
X
L
L
L
L
H
H
H
H
Y0
L
L
L
H
L
L
L
L
L
L
L
Y1
L
L
L
L
H
L
L
L
L
L
L
Y2
L
L
L
L
L
H
L
L
L
L
L
Y3
L
L
L
L
L
L
H
L
L
L
L
Y4
L
L
L
L
L
L
L
H
L
L
L
Y5
L
L
L
L
L
L
L
L
H
L
L
Y6
L
L
L
L
L
L
L
L
L
H
L
Y7
L
L
L
L
L
L
L
L
L
L
H
H = HIGH voltage level;
L = LOW voltage level;
X = don’t care.
74HC_HCT238_Q100
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 1 — 19 February 2013
4 of 17
Nexperia
74HC238-Q100; 74HCT238-Q100
3-to-8 line decoder/demultiplexer
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
V
CC
I
IK
I
OK
I
O
I
CC
I
GND
T
stg
P
tot
[1]
[2]
Parameter
supply voltage
input clamping current
output clamping current
output current
supply current
ground current
storage temperature
total power dissipation
Conditions
V
I
<
0.5
V or V
I
> V
CC
+ 0.5 V
V
O
<
0.5
V or V
O
> V
CC
+ 0.5 V
0.5
V < V
O
< V
CC
+ 0.5 V
[1]
[1]
Min
0.5
-
-
-
-
50
65
[2]
Max
+7
20
20
25
50
-
+150
500
Unit
V
mA
mA
mA
mA
mA
C
mW
-
The input and output voltage ratings may be exceeded if the input and output current ratings are observed.
For SO16 packages: above 70
C
the value of P
tot
derates linearly at 8 mW/K.
For TSSOP16 packages: above 60
C
the value of P
tot
derates linearly at 5.5 mW/K.
For DHVQFN16 packages: above 60
C
the value of P
tot
derates linearly at 4.5 mW/K.
8. Recommended operating conditions
Table 5.
Recommended operating conditions
Voltages are referenced to GND (ground = 0 V).
Symbol Parameter
V
CC
V
I
V
O
T
amb
t/V
supply voltage
input voltage
output voltage
ambient temperature
input transition rise
and fall rate
V
CC
= 2.0 V
V
CC
= 4.5 V
V
CC
= 6.0 V
Conditions
74HC238-Q100
Min
2.0
0
0
40
-
-
-
Typ
5.0
-
-
-
-
1.67
-
Max
6.0
V
CC
V
CC
+125
625
139
83
74HCT238-Q100
Min
4.5
0
0
40
-
-
-
Typ
5.0
-
-
-
-
1.67
-
Max
5.5
V
CC
V
CC
+125
-
139
-
V
V
V
C
ns/V
ns/V
ns/V
Unit
74HC_HCT238_Q100
All information provided in this document is subject to legal disclaimers.
©
Nexperia B.V. 2017. All rights reserved
Product data sheet
Rev. 1 — 19 February 2013
5 of 17
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