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Philips
Semiconductors
74F538
1-of -8 decoder (3state)
Product specification
IC15 Data Handbook
1989 Apr 06
INTEGRATED CIRCUITS
Philips Semiconductors
Product specification
74F538
1-of-8 decoder (3-State)
2
1989 Apr 06
8531273 96267
DESCRIPTION
The 74F538 decoder/demultiplexer accepts three address (A0 - A2)
input signals and decodes them to select one of eight mutually
exclusive outputs. A Polarity control (P) input determines whether
the outputs are active Low or active High. The 74F538 has 3-State
outputs, and a High signal on the Output Enables (OEn) inputs will
force all outputs to the high impedance state. Two active High (E2,
E3) and two active Low (E0, E1) inputs are available for easy
expansion to 1-of-32 decoding with four packages, or for data
demultiplexing to 1-of-8 or 1-of-16 destinations.
TYPE
TYPICAL
PROPAGATION DELAY
TYPICAL SUPPLY
CURRENT
(TOTAL)
74F538
8.5ns
35mA
ORDERING INFORMATION
DESCRIPTION
COMMERCIAL RANGE
V
CC
= 5V
10%,
T
amb
= 0
C to +70
C
PKG DWG #
20-Pin Plastic DIP
N74F538N
SOT146-1
20-Pin Plastic SOL
N74F538D
SOT163-1
PIN CONFIGURATION
20
19
18
17
16
15
14
13
12
10
11
9
8
7
6
5
4
3
2
1
V
CC
Q3
Q4
A2
E2
E3
P
Q7
Q2
Q1
Q0
A0
A1
Q5
Q6
GND
E0
E1
OE1
OE0
SF00996
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
20
A/0.6mA
E0, E1
Enable inputs (active Low)
1.0/1.0
20
A/0.6mA
E2, E3
Enable inputs (active High)
1.0/1.0
20
A/0.6mA
P
Polarity control input
1.0/1.0
20
A/0.6mA
OE0, OE1
Output Enable inputs
1.0/1.0
20
A/0.6mA
Q0 - Q7
Data outputs
150/40
3.0mA/24mA
NOTE: One (1.0) FAST Unit Load is defined as: 20
A in the High state and 0.6mA in the Low state.
LOGIC SYMBOL
6
7
17
V
CC
= Pin 20
GND = Pin 10
3
2
1
19
18
8
9
11
Q0
Q1
Q2
Q3
Q4 Q5
Q6
Q7
P
E0
E1
E2
E3
OE0
OE1
12
16
15
14
13
4
5
A0
A1
A2
SF00997
LOGIC SYMBOL (IEEE/IEC)
6
7
17
13
19
DMUX
1
2
3
5
0,8
0
2
G
0
7
SF00998
11
9
8
18
1,8
2,8
3,8
4,8
5,8
6,8
7,8
14
15
16
4
&
&
N8
EN
Philips Semiconductors
Product specification
74F538
1-of-8 decoder (3-State)
1989 Apr 06
3
LOGIC DIAGRAM
A2
A1
A0
E0
E1
E2
E3
P
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
OE0
OE1
VCC =
Pin 20
GND =
Pin 10
3
2
1
19
18
8
9
11
17
7
6
16
15
14
13
12
4
5
SF00999
FUNCTION TABLE
INPUTS
OUTPUTS
OPERATING MODE
OE
0
OE
1
E
0
E
1
E
2
E
3
A
2
A
1
A
0
Q
0
Q
1
Q2
Q3
Q4
Q5
Q6
Q7
OPERATING MODE
H
X
X
H
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
Z
High Impedance
L
L
L
L
L
L
L
L
H
X
X
X
X
H
X
X
X
X
L
X
X
X
X
L
X
X
X
X
X
X
X
X
X
X
X
X
Outputs equal P input
Disable
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
L
L
H
H
L
H
L
H
H
L
L
L
L
H
L
L
L
L
H
L
L
L
L
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
Active High output
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
H
L
H
L
H
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
L
L
L
L
H
L
L
L
L
H
L
L
L
L
H
Active High out ut
(P = L)
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
L
L
H
H
L
H
L
H
L
H
H
H
H
L
H
H
H
H
L
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
Active Low output
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
H
H
H
H
L
L
H
H
L
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
L
H
H
H
H
L
H
H
H
H
L
Active Low out ut
(P = H)
H = High voltage level
L = Low voltage level
X = Don't care
Z = High impedance "off" state
Philips Semiconductors
Product specification
74F538
1-of-8 decoder (3-State)
1989 Apr 06
4
ABSOLUTE MAXIMUM RATINGS
(Operation beyond the limits 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
V
CC
Supply voltage
0.5 to +7.0
V
V
IN
Input voltage
0.5 to +7.0
V
I
IN
Input current
30 to +5.0
mA
V
OUT
Voltage applied to output in High output state
0.5 to +V
CC
V
I
OUT
Current applied to output in Low output state
48
mA
T
amb
Operating free-air temperature range
0 to +70
C
T
stg
Storage temperature
65 to +150
C
RECOMMENDED OPERATING CONDITIONS
SYMBOL
PARAMETER
LIMITS
UNIT
SYMBOL
PARAMETER
MIN
NOM
MAX
UNIT
V
CC
Supply voltage
4.5
5.0
5.5
V
V
IH
High-level input voltage
2.0
V
V
IL
Low-level input voltage
0.8
V
I
IK
Input clamp current
18
mA
I
OH
High-level output current
3.0
mA
I
OL
Low-level output current
24
mA
T
amb
Operating free-air temperature range
0
70
C
DC ELECTRICAL CHARACTERISTICS
(Over recommended operating free-air temperature range unless otherwise noted.)
SYMBOL
PARAMETER
TEST CONDITIONS
1
LIMITS
UNIT
SYMBOL
PARAMETER
TEST CONDITIONS
1
MIN
TYP
2
MAX
UNIT
V
High level output voltage
V
CC
= MIN, V
IL
= MAX,
10%V
CC
2.4
V
V
OH
High-level output voltage
V
CC
MIN, V
IL
MAX,
V
IH
= MIN, I
OH
= MAX
5%V
CC
2.7
3.3
V
V
O
Low level output voltage
V
CC
= MIN, V
IL
= MAX,
10%V
CC
0.35
0.50
V
V
OL
Low-level output voltage
V
CC
MIN, V
IL
MAX,
V
IH
= MIN, I
OL
= MAX
5%V
CC
0.35
0.50
V
V
IK
Input clamp voltage
V
CC
= MIN, I
I
= I
IK
0.73
1.2
V
I
I
Input current at maximum input
voltage
V
CC
= MAX, V
I
= 7.0V
100
A
I
IH
High-level input current
V
CC
= MAX, V
I
= 2.7V
20
A
I
IL
Low-level input current
V
CC
= MAX, V
I
= 0.5V
0.6
mA
I
OZH
Off-state output current
High-level voltage applied
V
CC
= MAX, V
O
= 2.7V
50
A
I
OZL
Off-state output current
Low-level voltage applied
V
CC
= MAX, V
O
= 0.5V
50
A
I
OS
Short-circuit output current
3
V
CC
= MAX
60
150
mA
I
CCH
30
40
mA
I
CC
Supply current
I
CCL
V
CC
= MAX
35
50
mA
I
CCZ
35
50
mA
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value under the recommended operating conditions for the applicable type.
2. All typical values are at V
CC
= 5V, T
amb
= 25
C.
3. Not more than one output should be shorted at a time. For testing I
OS
, 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, I
OS
should be performed last.
Philips Semiconductors
Product specification
74F538
1-of-8 decoder (3-State)
1989 Apr 06
5
AC ELECTRICAL CHARACTERISTICS
LIMITS
T
amb
= +25
C
T
amb
= 0
C to +70
C
SYMBOL
PARAMETER
TEST CONDITIONS
V
CC
= +5.0V
V
CC
= +5.0V
10%
UNIT
C
L
= 50pF, R
L
= 500
C
L
= 50pF, R
L
= 500
MIN
TYP
MAX
MIN
MAX
t
PLH
t
PHL
Propagation delay
An to Qn
Waveform 1, 2
5.5
3.0
8.5
7.5
13.0
12.5
5.0
3.0
14.0
13.5
ns
ns
t
PLH
t
PHL
Propagation delay
E0 or E1 to Qn
Waveform 1, 2
5.5
3.0
8.5
7.5
12.0
12.0
5.0
3.0
13.0
12.5
ns
ns
t
PLH
t
PHL
Propagation delay
E2 or E3 to Qn
Waveform 1, 2
6.5
4.0
9.0
7.0
12.5
12.5
5.5
3.5
13.5
13.0
ns
ns
t
PLH
t
PHL
Propagation delay
P to Qn
Waveform 1, 2
4.5
3.5
9.5
6.5
15.0
10.0
4.0
3.5
16.5
10.5
ns
ns
t
PZH
t
PZL
Output Enable time
OE0 or OE1 to Qn
Waveform 3
Waveform 4
2.5
6.5
5.5
9.5
9.5
13.5
2.0
6.0
11.0
15.0
ns
ns
t
PHZ
t
PLZ
Output Disable time
OE0 or OE1 to Qn
Waveform 3
Waveform 4
1.0
1.0
3.0
3.5
6.0
8.5
1.0
1.0
7.0
9.5
ns
ns
AC WAVEFORMS
For all waveforms, V
M
= 1.5V.
V
M
V
M
V
M
V
M
t
PHL
t
PLH
An, P, En, En
Qn
SF01000
Waveform 1. Propagation Delay for
Non-Inverting Outputs
V
M
V
M
V
M
V
M
t
PLH
t
PHL
An, P, En, En
Qn
SF01001
Waveform 2. Propagation Delay for
Inverting Outputs
V
M
V
M
V
M
t
PHZ
t
PZH
OEn
Qn
V
OH
-0.3V
0V
SF01002
Waveform 3. 3-State Output Enable Time to High Level
and Output Disable Time from High Level
V
M
V
M
V
M
t
PLZ
t
PZL
OEn
Qn
V
OL
+0.3V
SF01003
Waveform 4. 3-State Output Enable Time to Low Level
and Output Disable Time from Low Level
Philips Semiconductors
Product specification
74F538
1-of-8 decoder (3-State)
1989 Apr 06
6
TEST CIRCUIT AND WAVEFORM
tw
90%
VM
10%
90%
VM
10%
90%
VM
10%
90%
VM
10%
NEGATIVE
PULSE
POSITIVE
PULSE
tw
AMP (V)
0V
0V
tTHL (tf
)
INPUT PULSE REQUIREMENTS
rep. rate
t
w
t
TLH
t
THL
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 3-State Outputs
DEFINITIONS:
R
L
= Load resistor;
see AC electrical characteristics for value.
C
L
= Load capacitance includes jig and probe capacitance;
see AC electrical characteristics for value.
R
T
= Termination resistance should be equal to Z
OUT
of
pulse generators.
tTHL (tf
)
tTLH (tr
)
tTLH (tr
)
AMP (V)
amplitude
3.0V
1.5V
V
M
RL
7.0V
SF00777
TEST
SWITCH
t
PLZ
closed
t
PZL
closed
All other
open
SWITCH POSITION
Philips Semiconductors
Product specification
74F538
1-of -8 decoder (3state)
1989 Apar 06
7
DIP20:
plastic dual in-line package; 20 leads (300 mil)
SOT146-1
Philips Semiconductors
Product specification
74F538
1-of -8 decoder (3state)
1989 Apar 06
8
SO20:
plastic small outline package; 20 leads; body width 7.5 mm
SOT163-1
Philips Semiconductors
Product specification
74F538
1-of -8 decoder (3state)
1989 Apar 06
9
NOTES
Philips Semiconductors
Product specification
74F538
1-of -8 decoder (3state)
yyyy mmm dd
10
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 affect 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 940883409
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:
9397-750-05133
Philips
Semiconductors
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.