MC74F138DD [MOTOROLA]
Decoder/Driver, F/FAST Series, Inverted Output, TTL, PDSO16, PLASTIC, SOIC-16;
| 型号： | MC74F138DD |
| 厂家： | 
MOTOROLA |
| 描述： | Decoder/Driver, F/FAST Series, Inverted Output, TTL, PDSO16, PLASTIC, SOIC-16 解码器 解复用器 |
| 文件： | 总3页 (文件大小：87K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
MC54/74F138
1-OF-8 DECODER/
DEMULTIPLEXER
The MC54/74F138 is a high speed 1-of-8 Decoder/Demultiplexer. This de-
vice is ideally suited for high speed bipolar memory chip select address de-
coding. The multiple input enables allow parallel expansion to a 1-of-24 de-
coder using just three F138 devices or to a 1-of-32 decoder using four F138s
and one inverter.
1-OF-8 DECODER/
DEMULTIPLEXER
FAST SHOTTKY TTL
• Demultiplexing Capability
• Multiple Input Enable for Easy Expansion
• Active Low Mutually Exclusive Outputs
• Input Clamp Diodes Limit High-Speed Termination Effects
J SUFFIX
CERAMIC
CONNECTION DIAGRAM DIP (TOP VIEW)
CASE 620-09
V
O
O
O
O
O
O
O
6
CC
0
1
2
3
4
5
16
1
16
15
14
13
12
11
10
9
N SUFFIX
PLASTIC
CASE 648-08
16
1
2
3
4
5
6
7
8
1
A
A
A
E
E
E
O
7
GND
0
1
2
1
2
3
D SUFFIX
SOIC
CASE 751B-03
16
1
ORDERING INFORMATION
LOGIC DIAGRAM
MC54FXXXJ
MC74FXXXN Plastic
MC74FXXXD SOIC
Ceramic
E
E
E
A
A
A
0
1
2
3
2
1
V
= PIN 16
CC
3
2
1
GND = PIN 8
4
5
6
= PIN NUMBERS
LOGIC SYMBOL
1
2
3
4 5 6
1
2 3
A
A A
1 2
0
O
O O O O O O O
1 2 3 4 5 6 7
0
15 14 13 12 11 10
9
7
7
9
10
11
12
13
14
15
V
= PIN 16
O
O
O
O
O
O
O
O
0
CC
GND = PIN 8
7
6
5
4
3
2
1
FAST AND LS TTL DATA
4-53
MC54/74F138
GUARANTEED OPERATING RANGES
Symbol
Parameter
Min
4.5
–55
0
Typ
5.0
25
Max
5.5
125
70
Unit
V
V
CC
Supply Voltage
54, 74
54
T
A
Operating Ambient Temperature Range
°C
74
25
I
I
Output Current — High
Output Current — Low
54, 74
54, 74
–1.0
20
mA
mA
OH
OL
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Input HIGH Voltage
Min
Typ
Max
Unit
V
Test Conditions
Guaranteed Input HIGH Voltage
Guaranteed Input LOW Voltage
V
IH
2.0
V
V
V
Input LOW Voltage
0.8
V
IL
Input Clamp Diode Voltage
Output HIGH Voltage
–1.2
V
V
= MIN, I = –18 mA
IN
IK
CC
OH
OH
54, 74
74
2.5
2.7
V
I
I
I
= –1.0 mA
= –1.0 mA
V
CC
V
CC
V
CC
= 4.50 V
OH
V
= 4.75 V
= MIN
V
OL
Output LOW Voltage
Input HIGH Current
0.5
20
V
= 20 mA
OL
I
µA
mA
mA
mA
mA
V
CC
V
CC
V
CC
V
CC
V
CC
= MAX, V = 2.7 V
IN
IH
0.1
= MAX, V = 7.0 V
IN
I
I
I
Input LOW Current
–0.6
–150
20
= MAX, V = 0.5 V
IN
IL
Output Short Circuit Current (Note 2)
Power Supply Current
–60
= MAX, V = 0 V
OUT
OS
CC
= MAX
NOTES:
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
= +25 °C
54F
74F
T
A
T
A
= +25°C to +125°C
T = 0°C to 70°C
A
Levels
of
V
= +5.0 V
= 50 pF
V
= 5.0 V ±10%
V
= 5.0 V ±10%
CC
CC
CC
C
Min
3.0
3.0
3.5
3.0
4.0
3.5
C
= 50 pF
C = 50 pF
L
L
L
Symbol
Parameter
Propagation Delay,
Address to Output
Enable to Output
Delay
3
Max
Min
3.0
3.0
3.5
3.0
4.0
3.5
Max
Min
3.0
3.0
3.5
3.0
4.0
3.5
Max
Unit
t
t
t
t
t
t
7.5
8.0
7.0
7.0
8.0
7.5
12
9.5
11
8.5
9.0
8.0
7.5
9.0
8.5
ns
PLH
PHL
PLH
PHL
PLH
PHL
2
3
ns
ns
E
1
or E
8.0
12.5
8.5
2
Enable to Output
E3
FUNCTIONAL DESCRIPTION
The decoder accepts three binary weighted inputs (A , A ,
expansion of the device to a 1-of-32 (5 lines to 32 lines)
decoder with just four F138s and one inverter.
O
1
A ) and when enabled provides eight mutually exclusive
2
activeLOWoutputs(O –O ).TheF138featuresthreeEnable
The F138 can be used as an 8-output demultiplexer by
using one of the active LOW Enable inputs as the data input
and the other Enable inputs as strobes. The Enable inputs
which are not used must be permanently tied to their
appropriate active HIGH or active LOW states.
0
7
inputs, two active LOW (E , E ) and one active HIGH (E ). All
1
2
3
outputs will be HIGH unless E and E are LOW and E is
1
2
3
HIGH. This multiple enable function allows easy parallel
FAST AND LS TTL DATA
4-54
MC54/74F138
FUNCTION TABLE
Inputs
Outputs
E
1
E
2
E
3
A
A
A
O
O
O
O
O
O
O
O
7
0
1
2
0
1
2
3
4
5
6
H
X
X
X
X
X
H
H
H
H
H
H
H
H
X
X
L
L
L
L
L
L
L
L
H
X
L
L
L
L
L
L
L
L
X
L
X
X
L
H
L
H
L
H
L
X
X
L
X
X
L
L
L
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
L
H
H
L
L
H
H
L
H
H
H
H
H
H
H
H
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
A
A
0
1
A
2
FO4
A
3
A
4
H
1 2 3
1 2 3
E
1 2 3
E
1 2 3
A
A
A
E
A
A
A
A
A
A
A
A
A
2
E
0
1
2
0
1
2
0
1
2
0
1
F138
F138
F138
F138
O
O
O
O
O
O
O
6
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O
O O
5 6
0
1
2
3
4
5
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
7
O
O
0
31
FAST AND LS TTL DATA
4-55
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