MC54/74F139
DUAL 1-OF-4 DECODER
The MC54/74F139 is a high speed Dual 1-of-4 Decoder/Demultiplexer.
The device has two independent decoders, each accepting two inputs and
providing four mutually exclusive active LOW outputs. Each decoder has an
active LOW Enable input which can be used as a data input for a 4-output de-
multiplexer. Each half of the F139 can be used as a function generator provid-
ing all four miniterms of two variables.
DUAL 1-OF-4
DECODER
FAST™ SHOTTKY TTL
•
•
•
•
Multifunction Capability
Two Completely Independent 1-of-4 Decoders
Active Low Mutually Exclusive Outputs
Input Clamp Diodes Limit High-Speed Termination Effects
CONNECTION DIAGRAM
VCC
16
Eb
15
A0b
14
A1b
13
O0b
12
O1b
11
O2b
10
O3b
9
J SUFFIX
CERAMIC
CASE 620-09
16
1
16
1
N SUFFIX
PLASTIC
CASE 648-08
1
Ea
2
A0a
3
A1a
4
O0a
5
O1a
6
O2a
7
O3a
8
GND
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
LOGIC DIAGRAM
Ea
1
2
A0a A1a
3
Eb
15
A0b A1b
14
13
MC54FXXXJ
MC74FXXXN
MC74FXXXD
Ceramic
Plastic
SOIC
LOGIC SYMBOL
1
2 3
15
14 13
E
A0 A1
E
A0 A1
O0 O1 O2 O3
O0 O1 O2 O3
4
5
6
7
12
11
10
9
4 5 6 7
O3b
12 11 10 9
O0a
O1a
O2a
O3a
O0b
O1b
O2b
VCC = Pin 16
GND = Pin 8
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
FAST AND LS TTL DATA
4-56
MC54/74F139
GUARANTEED OPERATING RANGES
Symbol
VCC
TA
IOH
IOL
Supply Voltage
Operating Ambient Temperature Range
Parameter
54, 74
54
74
Output Current — High
Output Current — Low
54, 74
54, 74
Min
4.5
–55
0
Typ
5.0
25
25
Max
5.5
125
70
–1.0
20
mA
mA
Unit
V
°C
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Limits
Symbol
VIH
VIL
VIK
VOH
VOL
IIH
IIL
IOS
ICC
Parameter
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH Voltage
Output LOW Voltage
Input HIGH Current
54, 74
74
2.5
2.7
0.5
20
0.1
Input LOW Current
Output Short Circuit Current (Note 2)
Power Supply Current
-60
–0.6
–150
20
Min
2.0
0.8
–1.2
Typ
Max
Unit
V
V
V
V
V
V
µA
mA
mA
mA
mA
Test Conditions
Guaranteed Input HIGH Voltage
Guaranteed Input LOW Voltage
VCC = MIN, IIN = –18 mA
IOH = –1.0 mA
IOH = –1.0 mA
IOL = 20 mA
VCC = 4.50 V
VCC = 4.75 V
VCC = MIN
VCC = MAX, VIN = 2.7 V
VCC = MAX, VIN = 7.0 V
VCC = MAX, VIN = 0.5 V
VCC = MAX, VOUT = 0 V
VCC = MAX
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS
54/74F
TA = +25°C
VCC = +5.0 V
CL = 50 pF
Symbol
tPLH
tPHL
tPLH
tPHL
Parameter
Propagation Delay,
Address to Output
Enable to Output
Min
3.5
3.5
3.5
2.5
Max
7.0
8.0
7.0
6.5
54F
TA = -55°C to +125°C
VCC = 5.0 V
±10%
CL = 50 pF
Min
2.5
3.5
3.0
2.5
Max
12.0
9.5
9.0
8.0
74F
TA = 0°C to 70°C
VCC = 5.0 V
±10%
CL = 50 pF
Min
3.0
3.5
3.5
2.5
Max
8.5
9.0
8.0
7.5
ns
Unit
ns
FUNCTIONAL DESCRIPTION
The F139 is a high speed dual 1-of-4 decoder/demultiplexer
fabricated with the Schottky barrier diode process. The device
has two independent decoders, each of which accepts two
binary weighted inputs (AO, A1) and provide four mutually ex-
clusive active LOW outputs (O0-O3). Each decoder has an ac-
tive LOW Enable (E). When E is HIGH all outputs are forced
HIGH. The enable can be used as the data input for a 4-output
demultiplexer application.
Each half of the F139 generates all four miniterms of two
variables. These four miniterms are useful in some applica-
tions, replacing multiple gate functions as shown in Figure 1,
and thereby reducing the number of packages required in a
logic network.
FAST AND LS TTL DATA
4-57