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Motorola Electronic Components Datasheet

SN54LS145 Datasheet

1-OF-10 DECODER/DRIVER OPEN-COLLECTOR

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1-OF-10 DECODER/DRIVER
OPEN-COLLECTOR
The SN54 / 74LS145, 1-of-10 Decoder/Driver, is designed to accept BCD
inputs and provide appropriate outputs to drive 10-digit incandescent
displays. All outputs remain off for all invalid binary input conditions. It is
designed for use as indicator/relay drivers or as an open-collector logic circuit
driver. Each of the high breakdown output transistors will sink up to 80 mA of
current. Typical power dissipation is 35 mW. This device is fully compatible
with all TTL families.
Low Power Version of 54 / 74145
Input Clamp Diodes Limit High Speed Termination Effects
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC
P0
P1
P2
P3
Q9
Q8
Q7
16
15
14
13
12
11
10
9
SN54/74LS145
1-OF-10 DECODER/ DRIVER
OPEN-COLLECTOR
LOW POWER SCHOTTKY
16
1
J SUFFIX
CERAMIC
CASE 620-09
1
Q0
2
Q1
3
Q2
4
Q3
5
Q4
6
Q5
7
Q6
8
GND
PIN NAMES
LOADING (Note a)
HIGH
LOW
P0, P1, P2, P3
Q0 to Q9
BCD Inputs
Outputs (Note b)
0.5 U.L.
Open Collector
0.25 U.L.
15 (7.5) U.L.
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 µA HIGH/1.6 mA LOW.
b) The Output LOW drive factor is 2.5 U.L. for Military (54) and 15 U.L. for Commercial (74)
Temperature Ranges.
LOGIC DIAGRAM
P0
INPUTS
P1
P2
P3
INPUT
INVERTERS
0
0
11
22
33
DECODE/DRIVER
GATES
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
OUTPUTS
FAST AND LS TTL DATA
5-240
16
1
N SUFFIX
PLASTIC
CASE 648-08
16
1
D SUFFIX
SOIC
CASE 751B-03
ORDERING INFORMATION
SN54LSXXXJ Ceramic
SN74LSXXXN Plastic
SN74LSXXXD SOIC
LOGIC SYMBOL
15 14 13 12
P0 P1 P2 P3
Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9
1 2 3 4 5 6 7 9 10 11
VCC = PIN 16
GND = PIN 8


Motorola Electronic Components Datasheet

SN54LS145 Datasheet

1-OF-10 DECODER/DRIVER OPEN-COLLECTOR

No Preview Available !

SN54 / 74LS145
TRUTH TABLE
INPUTS
OUTPUTS
P3 P2 P1 P0 Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 Q8 Q9
L L L L LHHHHHHHHH
L L LHHLHHHHHHHH
L LHLHHLHHHHHHH
L LHHHHHLHHHHHH
LHL LHHHHLHHHHH
L H L HHHHHH L HHHH
L HH L HHHHHH L HHH
L HHHHHHHHHH L HH
HL L LHHHHHHHHLH
HL LHHHHHHHHHHL
H L H L HHHHHHHHHH
H L HHHHHHHHHHHH
HHL LHHHHHHHHHH
HH L HHHHHHHHHHH
HHH L HHHHHHHHHH
HHHHHHHHHHHHHH
H = HIGH Voltage Level
L = LOW Voltage Level
GUARANTEED OPERATING RANGES
Symbol
Parameter
VCC
Supply Voltage
TA Operating Ambient Temperature Range
VOH
IOL
Output Voltage — High
Output Current — Low
Min Typ Max Unit
54 4.5 5.0 5.5
74 4.75 5.0 5.25
V
54 – 55 25 125 °C
74 0 25 70
54, 74
15 V
54 12 mA
74 24
FAST AND LS TTL DATA
5-241


Part Number SN54LS145
Description 1-OF-10 DECODER/DRIVER OPEN-COLLECTOR
Maker Motorola Inc
Total Page 5 Pages
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