DIODES 74HCT138T16

74HCT138
3 TO 8 LINE DECODER DEMULTIPLEXER
Description
Pin Assignments
The 74HCT138 is a high speed CMOS device that is designed to be
pin compatable with 74LS low power Schottky types.
The device accepts a three bit binary weighted address on input pins
A0, A1 and A2 and when enabled will produce one active low output
with the remaing seven being high.
There are two active LOW enable inputs E1 and E2, and one active
HIGH enable input E3. The disabled device state results in all outputs
being high. The enable state occurs with E1 and E2 asserted low and
E3 asserted high.
The multiple enable lines allow for the parallel expansion of decoders
to create 4-to-16 line versions with no additional parts and 5-to-32
versions with the addition of a single inverter.
Features
Applications
•
Wide Supply Voltage Range from 4.5V to 5.5V
•
Memory chip select decoding
•
Sinks or sources 8mA at VCC = 4.5V
•
Demultiplexing
•
CMOS low power consumption
•
Single line peripheral control
•
Schmitt Trigger Action at All Inputs
•
Allow simple serial bit streams from a microcontroller to control as
•
Inputs accept up to 6.0V
•
ESD Protection Tested per JESD 22
many peripheral lines as needed.

Exceeds 200-V Machine Model (A115-A)

Exceeds 2000-V Human Body Model (A114-A)

•
Exceeds 1000-V Charged Device Model (C101C)
Latch-Up Exceeds 250mA per JESD 78, Class II

Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)

Halogen and Antimony Free. “Green” Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
Click here for ordering information, located at the end of datasheet
74HCT138
Document number: DS35489 Rev. 3 - 2
1 of 10
www.diodes.com
June 2013
© Diodes Incorporated
74HCT138
Pin Descriptions
Pin Number
Pin Name
1
A0
Address Input 0
2
A1
Address Input 1
3
A2
Address Input 2
4
E1
Enable Input 1 (active LOW)
5
E2
6
E3
Enable Input 3 (active HIGH)
7
Y7
Output 7 (active LOW)
8
GND
Description
Enable Input 2 (active LOW)
Ground
9
Y6
Output 6 (active LOW)
10
Y5
Output 5 (active LOW)
11
Y4
Output 4 (active LOW)
12
Y3
Output 3 (active LOW)
13
Y2
Output 2 (active LOW)
14
Y1
Output 1 (active LOW)
15
Y0
Output o (active LOW)
16
Vcc
Supply Voltage
Function Table Diagram
Control
Input
Output
E1
E2
E3
A2
A1
A0
Y7
Y6
Y5
Y4
Y3
Y2
Y1
Y0
H
X
X
X
X
X
H
H
H
H
H
H
H
H
X
H
X











X
X
L











L
L
H














L
L
L
H
H
H
H
H
H
H
L



L
L
H
H
H
H
H
H
H
L
H



L
H
L
H
H
H
H
H
L
H
H



L
H
H
H
H
H
H
L
H
H
H



H
L
L
H
H
H
L
H
H
H
H



H
L
H
H
H
L
H
H
H
H
H



H
H
L
H
L
H
H
H
H
H
H



H
H
H
L
H
H
H
H
H
H
H
74HCT138
Document number: DS35489 Rev. 3 - 2
2 of 10
www.diodes.com
June 2013
© Diodes Incorporated
74HCT138
Logic Diagram
74HCT138
Document number: DS35489 Rev. 3 - 2
3 of 10
www.diodes.com
June 2013
© Diodes Incorporated
74HCT138
Absolute Maximum Ratings (Note 4) (@TA = +25°C, unless otherwise specified.)
Symbol
Description
Rating
Unit
ESD HBM
Human Body Model ESD Protection
2
KV
ESD CDM
Charged Device Model ESD Protection
1
KV
ESD MM
Machine Model ESD Protection
200
V
VCC
Supply Voltage Range
-0.5 to 7.0
V
VI
Input Voltage Range
-0.5 to 7.0
V
Vo
Voltage Applied to Output in High or Low State
-0.3 to VCC
V
IIK
Input Clamp Current VI < -0.5V
-20
mA
mA
IIK
Input Clamp Current VI > VCC + 0.5V
20
IOK
Output Clamp Current VO < -0.5V
-20
mA
IOK
Output Clamp Current VO > VCC + 0.5V
20
mA
IO
Continuous Output Current
+/- 25
mA
ICC
Continuous Current Through VCC
50
mA
IGND
Continuous Current Through GND
-50
mA
TJ
Operating Junction Temperature
-40 to 150
°C
TSTG
Storage Temperature
-65 to 150
°C
PTOT
Total Power Dissipation
500
mW
Note:
4. Stresses beyond the absolute maximum may result in immediate failure or reduced reliability. These are stress values and device operation should
be within recommend values.
Recommended Operating Conditions (Note 5) (@TA = +25°C, unless otherwise specified.)
Symbol
VCC
VI
VO
Min
Max
Unit
Supply Voltage
Parameter
Conditions

4.5
5.5
V
Input Voltage

0
Vcc
V
Active Mode
0
VCC
V
t/V
Input transition rise or fall rate
VCC = 4.5V

100
ns/V
TA
Operating free-air temperature

-40
125
°C
Note:
Output Voltage
5. Unused inputs should be held at VCC or Ground.
74HCT138
Document number: DS35489 Rev. 3 - 2
4 of 10
www.diodes.com
June 2013
© Diodes Incorporated
74HCT138
Electrical Characteristics (@TA = +25°C, unless otherwise specified.)
Symbol
Parameter
VIH
High-level
Input Voltage

VIL
Low-level
input voltage

VOH
High Level
Output
Voltage
VOL
Low-level
Output
Voltage
II
ICC
∆ICC
Test Conditions
Vcc
-40°C to 85°C
-40°C to 125°C
Unit
Min
Typ
Max
Min
Max
Min
Max
4.5V to 5.5V
2.0
1.6

2.0

2.0

V
4.5V to 5.5V

1.2
0.8

0.8

0.8
V
IOH = -20 μA
4.5V
4.4
4.5

4.4

4.4

IOH = -4 mA
4.5V
3.98
4.32

3.85

3.7
IOL = 20 μA
4.5V

0
0.1

0.1

0.1

0.15
0.26

0.33

0.4

±0.1

±1

±1
μA

8.0

80

160
μA
150
540

675

735
IOL = 4 mA
4.5V
Input Current
VI =GND to
5.5 V
5.5V
Supply
Current
VI = GND or VCC
IO=0
5.5V
Additional
Supply
Current
TA = 25°C



V
V
Test Per
Pin
PINS
An

VI =
PIN En

125
450

563

613

100
360

450

490
μA

4
10

10

10
pF
μA
4.5V to 5.5V
Vcc -2.1 V
Other
VI = Vcc
or GND
PIN E3
IO=0
Ci
Input
Vi = VCC or GND
Capacitance
5.5V
Switching Characteristics
Symbol /
Parameter
tPLH,
tPLH
Propagation
Delay
tTLH,
tTHL
Transition
Time
Pins
Test
Conditions
An to Yn
Figure 2
E3 to Yn
Figure 2
En to Yn
Figure 2
Yn
Figure 2
74HCT138
Document number: DS35489 Rev. 3 - 2
Vcc
TA=25°C
-40°C to 85°C
-40°C to 125°C
Min
Typ.
Max
Min
Max
Min
Max
4.5V

20
35

35

45
5.0V

17





4.5V

18
40

40

45
5.0V

19





4.5V

19
40

40

45
5.0V

19





4.5 V

7
15

15

110
5 of 10
www.diodes.com
Unit
ns
ns
June 2013
© Diodes Incorporated
74HCT138
Operating Characteristics (@TA = +25°C, unless otherwise specified.)
Parameter
Cpd
VCC = 5V
Test Conditions
Power Dissipation Capacitance
Unit
TYP
f = 1 MHz all outputs switching-no load
21
pF
Parameter Measurement Information
Inputs
VCC
VM
CL
6ns
VCC/2
50pF
6ns
VCC/2
15pF used for 5V typical test
VI
tr/tf
4.5V
3V
5.0V
3V
Voltage Waveform
Pulse Duration
Voltage Waveform
Propagation Delay Times
Inverting and Non Inverting Outputs
Notes: A . Includes test lead and test apparatus capacitance.
B. All pulses are supplied at pulse repetition rate ≤ 10 MHz
C. Inputs are measured separately one transition per measurement
D. tPLH and tPHL are the same as tPD
Figure 1. Load Circuit and Voltage Waveforms
74HCT138
Document number: DS35489 Rev. 3 - 2
6 of 10
www.diodes.com
June 2013
© Diodes Incorporated
74HCT138
Ordering Information
Device
Package Code
74HCT138S16-13
74HCT138T16-13
Notes:
7” Tape and Reel(Note 7)
Packaging
(Note 6)
Quantity
Part Number Suffix
S16
SO-16
2500/Tape & Reel
-13
T16
TSSOP-16
2500/Tape & Reel
-13
6. Pad layout as shown on Diodes Inc. suggested pad layout document AP02001, which can be found on our website at
http://www.diodes.com/datasheets/ap02001.pdf.
http://www.diodes.com/datasheets/ap02001.pdf.
7. The taping orientation is located on our website at http://www.diodes.com/datasheets/ap02007.pdf
Marking Information
(1) SO-16, TSSOP-16
Part Number
74HCT138
Document number: DS35489 Rev. 3 - 2
Package
74HCT138S16
SO-16
74HCT138T16
TSSOP-16
7 of 10
www.diodes.com
June 2013
© Diodes Incorporated
74HCT138
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for latest version.
Package Type: SO-16
H
E
Gauge Plane

L
Detail ‘A’
D
A
A2
e
B
A1
C
SO-16
Dim
Min
Max
A
1.40
1.75
A1
0.10
0.25
A2
1.30
1.50
B
0.33
0.51
C
0.19
0.25
D
9.80
10.00
E
3.80
4.00
e
1.27 Typ
H
5.80
6.20
L
0.38
1.27
Θ
0
8
All Dimensions in mm
Detail ‘A’
Package Type: TSSOP-16
E/2
SEE DETAIL 'A'
E1
E
Y
X
PIN 1
x)
b
e

Ø0.760Depth0.050±0.02
A2
R1
D
R
L2
C
GAUGE
PLANE
A
L
SEATING PLANE
A1
L1

TSSOP-16
Dim Min Max Typ
A
1.08
A1 0.05 0.15
A2 0.80 0.93
b 0.19 0.30
c 0.09 0.20
D 4.90 5.10
E
6.40 BSC
E1 4.30 4.50
e
0.65 BSC
L 0.45 0.75
L1
1.00 REF
L2
0.25 BSC
R 0.09
R1 0.09
X
1.350
Y
1.050
Θ
0°
8°
Θ1
5°
15°
Θ2
0°
All Dimensions in mm
DETAIL 'A'
74HCT138
Document number: DS35489 Rev. 3 - 2
8 of 10
www.diodes.com
June 2013
© Diodes Incorporated
74HCT138
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
Package Type: SO-16
X1
Y1
Y
Pin 1
Dimensions
C
X
X1
Y
Y1
Value (in mm)
1.270
0.670
9.560
1.450
6.400
C
X
Package Type: TSSOP-16
X1
Dimensions
C
X
X1
Y
Y1
Y1
Y (16x)
Value (in mm)
0.650
0.350
4.900
1.400
6.800
1
X (16x)
74HCT138
Document number: DS35489 Rev. 3 - 2
C
9 of 10
www.diodes.com
June 2013
© Diodes Incorporated
74HCT138
IMPORTANT NOTICE
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.
Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales
channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.
Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.
This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.
LIFE SUPPORT
Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
A. Life support devices or systems are devices or systems which:
1. are intended to implant into the body, or
2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.
B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.
Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or
systems.
Copyright © 2013, Diodes Incorporated
www.diodes.com
74HCT138
Document number: DS35489 Rev. 3 - 2
10 of 10
www.diodes.com
June 2013
© Diodes Incorporated