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Motorola Electronic Components Datasheet

MC54F138 Datasheet

1-OF-8 DECODER/ DEMULTIPLEXER

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MC54F138 pdf
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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.
Demultiplexing Capability
Multiple Input Enable for Easy Expansion
Active Low Mutually Exclusive Outputs
Input Clamp Diodes Limit High-Speed Termination Effects
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC O0 O1 O2 O3 O4 O5 O6
16 15 14 13 12 11 10 9
12345678
A0 A1 A2 E1 E2 E3 OD7 atGaNSDheet4U.com
A2 A1 A0
32
1
LOGIC DIAGRAM
E1 E2 E3
4 56
VCC = PIN 16
GND = PIN 8
= PIN NUMBERS
7 9 10 11 12 13 14 15
O7 O6 O5 O4 O3 O2 O1 O0
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FAST AND LS TTL DATA
4-53
MC54/74F138
1-OF-8 DECODER/
DEMULTIPLEXER
FASTSHOTTKY TTL
16
1
J SUFFIX
CERAMIC
CASE 620-09
16
1
N SUFFIX
PLASTIC
CASE 648-08
DataShee
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
MC54FXXXJ
MC74FXXXN
MC74FXXXD
Ceramic
Plastic
SOIC
LOGIC SYMBOL
1 2 3 456
A0 A1 A2
123
O0 O1 O2 O3 O4 O5 O6 O7
15 14 13 12 11 10 9 7
VCC = PIN 16
GND = PIN 8


Motorola Electronic Components Datasheet

MC54F138 Datasheet

1-OF-8 DECODER/ DEMULTIPLEXER

No Preview Available !

MC54F138 pdf
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MC54/74F138
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
TA
Supply Voltage
Operating Ambient Temperature Range
IOH Output Current — High
IOL Output Current — Low
Min Typ Max Unit
54, 74
4.5
5.0
5.5
V
54 –55 25 125 °C
74 0 25 70
54, 74
–1.0 mA
54, 74
20 mA
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DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min Typ Max Unit
Test Conditions
VIH Input HIGH Voltage
2.0 V Guaranteed Input HIGH Voltage
VIL Input LOW Voltage
0.8 V Guaranteed Input LOW Voltage
VIK Input Clamp Diode Voltage
–1.2 V VCC = MIN, IIN = –18 mA
VOH
Output HIGH Voltage
54, 74 2.5
V IOH = –1.0 mA
VCC = 4.50 V
74 2.7
V IOH = –1.0 mA
VCC = 4.75 V
VOL
Output LOW Voltage
0.5 V IOL = 20 mA
VCC = MIN
IIH Input HIGH Current
20 µA VCC = MAX, VIN = 2.7 V
0.1 mA VCC = MAX, VIN = 7.0 V
IIL Input LOW Current
–0.6 mA VCC = MAX, VIN = 0.5 V
IOS Output Short Circuit Current (Note 2) –60
–150 mA VCC = MAX, VOUT = 0 V
ICC Power Supply Current
20 mA VCC = MAX
NOTES:
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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
Symbol
tPLH
tPHL
tPLH
tPHL
tPLH
tPHL
Parameter
Propagation Delay,
Address to Output
Enable to Output
E1 or E2
Enable to Output
E3
Levels
of
Delay
3
2
3
54/74F
TA = +25 °C
VCC = +5.0 V
CL = 50 pF
Min Max
3.0 7.5
3.0 8.0
3.5 7.0
3.0 7.0
4.0 8.0
3.5 7.5
54F
TA = +25°C to +125°C
VCC = 5.0 V ±10%
CL = 50 pF
Min Max
3.0 12
3.0 9.5
3.5 11
3.0 8.0
4.0 12.5
3.5 8.5
74F
TA = 0°C to 70°C
VCC = 5.0 V ±10%
CL = 50 pF
Min Max
3.0 8.5
3.0 9.0
3.5 8.0
3.0 7.5
4.0 9.0
3.5 8.5
Unit
ns
ns
ns
DataShee
FUNCTIONAL DESCRIPTION
The decoder accepts three binary weighted inputs (AO, A1,
A2) and when enabled provides eight mutually exclusive
active LOW outputs (O0–O7). The F138 features three Enable
inputs, two active LOW (E1, E2) and one active HIGH (E3). All
outputs will be HIGH unless E1 and E2 are LOW and E3 is
HIGH. This multiple enable function allows easy parallel
DataSheet4U.com
expansion of the device to a 1-of-32 (5 lines to 32 lines)
decoder with just four F138s and one inverter.
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.
DataSheet4 U .com
FAST AND LS TTL DATA
4-54


Part Number MC54F138
Description 1-OF-8 DECODER/ DEMULTIPLEXER
Maker Motorola
Total Page 3 Pages
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