74F138
1-of-8 decoder/demultiplexer
Product specification
IC15 Data Handbook
1991 Feb 14
INTEGRATED CIRCUITS
Philips Semiconductors Product specification
74F1381-of-8 decoder/demultiplexer
2
February 14, 1991 853–0343 01719
FEATURE
• Demultiplexing capability
•Multiple input enable for easy expansion
•Ideal for memory chip select decoding
•Industrial temperature range available (–40°C to +85°C)
DESCRIPTION
The 74F138 decoder accepts three binary weighted inputs (A0, A1,
A2) and when enabled, provides eight mutually exclusive, active low
outputs (Q0 – Q7). The device features three enable inputs; two
active low (E0, E1) and one active high (E2). Every output will be
high unless E0 and E1 are low and E2 is high. This multiple enable
function allows easy parallel expansion of the device to 1-of-32
(5 lines to 32 lines) decoder with just four 74F138s and one inverter
(see Figure 1). The device 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. Enable
inputs not used must be permanently tied to their appropriate active
high or active low state.
PIN CONFIGURATION
16
15
14
13
12
11
107
6
5
4
3
2
1
Q7
VCC
Q3
Q4
Q5
Q2
Q0
Q1
A0
A1
E2
A2
E0
E1
98GND Q6
SF00174
TYPE TYPICAL
PROPAGATION
DELAY
TYPICAL
SUPPLY CURRENT
(TOTAL)
74F138 5.8ns 13mA
ORDERING INFORMATION
ORDER CODE
DESCRIPTION COMMERCIAL RANGE
VCC = 5V ±10%, Tamb = 0°C to +70°CINDUSTRIAL RANGE
VCC = 5V ±10%, Tamb = –40°C to +85°CPKG DWG #
16-pin plastic DIP N74F138N I74F138N SOT38-4
16-pin plastic SO N74F138D I74F138D SOT109-1
INPUT AND OUTPUT LOADING AND FAN-OUT TABLE
PINS DESCRIPTION 74F (U.L.) HIGH/LOW LOAD VALUE HIGH/LOW
A0 – A2 Address inputs 1.0/1.0 20µA/0.6mA
E0, E1Enable inputs (active Low) 1.0/1.0 20µA/0.6mA
E2 Enable input (active High) 1.0/1.0 20µA/0.6mA
Q0 – Q7Data outputs 50/33 1.0mA/20mA
NOTE:
One (1.0) FAST unit load is defined as: 20µA in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
A1 A2A0
Q2 Q3 Q4 Q5
13 12 11 10
123
VCC = Pin 16
GND = Pin 8
SF00175
Q1
14
Q0
15
Q6
9
Q7
7
4
5
6
E0
E1
E2
IEC/IEEE SYMBOL
SF00176
DMUX
1
2
4
5
6
15
14
13
12
11
10
9
7
00
1
2
G0
3
3
4
5
6
7
32
&
Philips Semiconductors Product specification
74F1381-of-8 decoder/demultiplexer
February 14, 1991 3
LOGIC DIAGRAM
15 14 13 12 11 10 9 7
Q0Q1Q2Q3Q4Q5Q6Q7
3
2
1
4
5
6
A2
A1
A0
E0
E1
E2
VCC = Pin 16
GND = Pin 8
SF00177
FUNCTION TABLE
INPUTS OUTPUTS
E0 E1 E2 A0 A1 A2 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
HXXXXX 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
NOTES:
H = High voltage level
L = Low voltage level
X = Don’t care
APPLICATION
SF00178
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
A0 A1 A2
E2
E1
E0 74F138
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
A0 A1 A2
E2
E1
E0 74F138
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
A0 A1 A2
E2
E1
E0 74F138
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
A0 A1 A2
E2
E1
E0 74F138
74F04
Q31Q0
A0
A1
A2
A3
A4 H
Figure 1. Expansion of 1-of-8 Decoding
Philips Semiconductors Product specification
74F1381-of-8 decoder/demultiplexer
February 14, 1991 4
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limit set forth in this table may impair the useful life of the device.
Unless otherwise noted these limits are over the operating free air temperature range.)
SYMBOL PARAMETER RATING UNIT
VCC Supply voltage –0.5 to +7.0 V
VIN Input voltage –0.5 to +7.0 V
IIN Input current –30 to +5 mA
VOUT Voltage applied to output in High output state –0.5 to VCC V
IOUT Current applied to output in Low output state 40 mA
T
O
p
erating free air tem
p
erature range
Commercial range 0 to +70 °C
T
amb
Operating
free
-
air
temperat
u
re
range
Industrial range –40 to +85 °C
Tstg Storage temperature range –65 to +150 °C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
SYMBOL
PARAMETER
MIN NOM MAX
UNIT
VCC Supply voltage 4.5 5.0 5.5 V
VIH High-level input voltage 2.0 V
VIL Low-level input voltage 0.8 V
IIK Input clamp current –18 mA
IOH High-level output current –1 mA
IOL Low-level output current 20 mA
Tb
O
p
erating free-air tem
p
erature range
Commercial range 0 +70 °C
T
amb
O erating
free
-
air
tem erature
range
Industrial range –40 +85 °C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS1
LIMITS
UNIT
SYMBOL
PARAMETER
TEST
CONDITIONS1
MIN TYP2MAX
UNIT
VO
High level out
p
ut voltage
V
CC
= MIN, VIL = MAX,
IO= MAX
±10%VCC 2.5 V
V
OH
High
-
le
v
el
o
u
tp
u
t
v
oltage
CC ,IL ,
VIH = MIN
I
OH =
MAX
±5%VCC 2.7 3.4 V
VO
Low level out
p
ut voltage
V
CC
= MIN, VIL = MAX,
IO= MAX
±10%VCC 0.30 0.50 V
V
OL
Lo
w-
le
v
el
o
u
tp
u
t
v
oltage
CC ,IL ,
VIH = MIN
I
OL =
MAX
±5%VCC 0.30 0.50 V
VIK Input clamp voltage VCC = MIN, II = IIK –0.73 –1.2 V
IIInput current at maximum input voltage VCC = MAX, VI = 7.0V 100 µA
IIH High-level input current VCC = MAX, VI = 2.7V 20 µA
IIL Low-level input current VCC = MAX, VI = 0.5V –0.6 mA
IOS Short-circuit output current3VCC = MAX –60 –150 mA
ICC Supply current4 (total) VCC = MAX 13 20 mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable type.
2. All typical values are at VCC = 5V, Tamb = 25°C.
3. Not more than one output should be shorted at a time. For testing IOS, the use of high-speed test apparatus and/or sample-and-hold
techniques are preferable in order to minimize internal heating and more accurately reflect operational values. Otherwise, prolonged shorting
of a high output may raise the chip temperature well above normal and thereby cause invalid readings in other parameter tests. In any
sequence of parameter tests, IOS tests should be performed last.
4. Measure ICC, outputs must be open, VIN on all inputs = 4.5V.
Philips Semiconductors Product specification
74F1381-of-8 decoder/demultiplexer
February 14, 1991 5
AC ELECTRICAL CHARACTERISTICS
LIMITS
SYMBOL PARAMETER TEST
CONDITION
VCC = +5.0V
Tamb = +25°C
CL = 50pF
RL = 500Ω
VCC = +5.0V ± 10%
Tamb = 0°C to +70°C
CL = 50pF
RL = 500Ω
VCC = +5.0V ± 10%
Tamb = –40°C to +85°C
CL = 50pF
RL = 500ΩUNIT
MIN TYP MAX MIN MAX MIN MAX
tPLH
tPHL Propagation delay
An to Qn Waveform 1, 2 3.5
4.0 5.6
6.1 7.0
8.0 3.5
4.0 8.0
9.0 3.0
3.5 8.5
9.0 ns
tPLH
tPHL Propagation delay
E0 or E1 to Qn Waveform 2 3.5
3.0 6.4
5.3 7.0
7.0 3.5
3.0 8.0
7.5 3.0
3.0 8.0
7.5 ns
tPLH
tPHL Propagation delay
E2 to Qn Waveform 1 4.0
3.5 6.2
5.6 8.0
7.5 4.0
3.5 9.0
8.5 4.0
3.5 9.5
8.5 ns
AC WAVEFORMS
For all waveforms, VM = 1.5V
VM
VM
VM
VM
Qn
An, E2
tPHL tPLH
SF00179
W aveform 1. Propagation Delay for Inverting Outputs
VM
VM
VM
VM
Qn
An, E0, E1
tPHL tPLH
SF00180
W aveform 2. Propagation Delay for Non-Inverting Outputs
TEST CIRCUIT AND WAVEFORMS
tw90%
VM
10%
90%
VM10%
90%
VM10%
90%
VM
10%
NEGATIVE
PULSE
POSITIVE
PULSE
tw
AMP (V)
0V
0V
tTHL (tf )
INPUT PULSE REQUIREMENTS
rep. rate twtTLH tTHL
1MHz 500ns 2.5ns 2.5ns
Input Pulse Definition
VCC
family
74F
D.U.T.
PULSE
GENERATOR
RL
CL
RT
VIN VOUT
Test Circuit for Totem-Pole Outputs
DEFINITIONS:
RL= Load resistor;
see AC ELECTRICAL CHARACTERISTICS for value.
CL= Load capacitance includes jig and probe capacitance;
see AC ELECTRICAL CHARACTERISTICS for value.
RT= Termination resistance should be equal to ZOUT of
pulse generators.
tTHL (tf )
tTLH (tr )
tTLH (tr )AMP (V)
amplitude
3.0V 1.5V
VM
SF00006
Philips Semiconductors Product specification
74F1381-of-8 decoder/demultiplexer
1991 Feb 14 6
DIP16: plastic dual in-line package; 16 leads (300 mil) SOT38-4
Philips Semiconductors Product specification
74F1381-of-8 decoder/demultiplexer
1991 Feb 14 7
SO16: plastic small outline package; 16 leads; body width 3.9 mm SOT109-1
Philips Semiconductors Product specification
74F1381-of-8 decoder/demultiplexer
yyyy mmm dd 8
Definitions
Short-form specification — The data in a short-form specification is extracted from a full data sheet with the same type number and title. For
detailed information see the relevant data sheet or data handbook.
Limiting values definition — Limiting values given are in accordance with the Absolute Maximum Rating System (IEC 134). Stress above one
or more of the limiting values may cause permanent damage to the device. These are stress ratings only and operation of the device at these or
at any other conditions above those given in the Characteristics sections of the specification is not implied. Exposure to limiting values for extended
periods may af fect device reliability.
Application information — Applications that are described herein for any of these products are for illustrative purposes only. Philips
Semiconductors make no representation or warranty that such applications will be suitable for the specified use without further testing or
modification.
Disclaimers
Life support — These products are not designed for use in life support appliances, devices or systems where malfunction of these products can
reasonably be expected to result in personal injury . Philips Semiconductors customers using or selling these products for use in such applications
do so at their own risk and agree to fully indemnify Philips Semiconductors for any damages resulting from such application.
Right to make changes — Philips Semiconductors reserves the right to make changes, without notice, in the products, including circuits, standard
cells, and/or software, described or contained herein in order to improve design and/or performance. Philips Semiconductors assumes no
responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright, or mask work right to these
products, and makes no representations or warranties that these products are free from patent, copyright, or mask work right infringement, unless
otherwise specified.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
Copyright Philips Electronics North America Corporation 1998
All rights reserved. Printed in U.S.A.
print code Date of release: 10-98
Document order number: 9397-750-05076
Data sheet
status
Objective
specification
Preliminary
specification
Product
specification
Product
status
Development
Qualification
Production
Definition [1]
This data sheet contains the design target or goal specifications for product development.
Specification may change in any manner without notice.
This data sheet contains preliminary data, and supplementary data will be published at a later date.
Philips Semiconductors reserves the right to make chages at any time without notice in order to
improve design and supply the best possible product.
This data sheet contains final specifications. Philips Semiconductors reserves the right to make
changes at any time without notice in order to improve design and supply the best possible product.
Data sheet status
[1] Please consult the most recently issued datasheet before initiating or completing a design.
