ONSEMI 74LS145

SN74LS145
1-of-10 Decoder/Driver
Open-Collector
The SN74LS145, 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.
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LOW
POWER
SCHOTTKY
• Low Power Version of 74145
• Input Clamp Diodes Limit High Speed Termination Effects
GUARANTEED OPERATING RANGES
Symbol
VCC
TA
Parameter
Supply Voltage
Operating Ambient
Temperature Range
Min
Typ
Max
Unit
4.75
5.0
5.25
V
0
25
70
°C
16
1
VOH
Output Voltage – High
15
V
IOL
Output Current – Low
24
mA
PLASTIC
N SUFFIX
CASE 648
16
1
SOIC
D SUFFIX
CASE 751B
ORDERING INFORMATION
 Semiconductor Components Industries, LLC, 1999
December, 1999 – Rev. 6
1
Device
Package
Shipping
SN74LS145N
16 Pin DIP
2000 Units/Box
SN74LS145D
16 Pin
2500/Tape & Reel
Publication Order Number:
SN74LS145/D
SN74LS145
CONNECTION DIAGRAM DIP (TOP VIEW)
VCC
P0
P1
P2
P3
Q9
Q8
Q7
16
15
14
13
12
11
10
9
8
1
2
3
4
5
6
7
Q0
Q1
Q2
Q3
Q4
Q5
Q6 GND
LOADING (Note a)
HIGH
LOW
0.5 U.L.
Open Collector
0.25 U.L.
15 U.L.
PIN NAMES
P0, P1, P2, P3
Q0 – Q9
BCD Inputs
Outputs
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 mA HIGH/1.6 mA LOW.
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
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2
SN74LS145
LOGIC DIAGRAM
INPUTS
P0
P1
P2
P3
INPUT
INVERTERS
0
0
Q0
Q1
1
1
2
2
3
3
Q3
Q4
Q5
Q6
Q7
DECODE/DRIVER
GATES
Q2
Q8 Q9
OUTPUTS
TRUTH TABLE
INPUTS
OUTPUTS
P3
P2
P1
P0
Q0
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
L
L
L
L
L
L
L
L
H
H
H
H
H
H
H
H
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
L
H
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
L
H
H
H
H
H
H
H = HIGH Voltage Level
L = LOW Voltage Level
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3
SN74LS145
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)
Limits
Symbol
Parameter
Min
VIH
Input HIGH Voltage
VIL
Input LOW Voltage
VIK
Input Clamp Diode Voltage
IOH
Output HIGH Current
VOL
Output LOW Voltage
IIH
Input HIGH Current
IIL
Input LOW Current
ICC
Power Supply Current
Typ
Max
Unit
Test Conditions
V
Guaranteed Input HIGH Voltage for
All Inputs
V
Guaranteed Input LOW Voltage for
All Inputs
– 1.5
V
VCC = MIN, IIN = – 18 mA
250
µA
VCC = MIN, VOH = MAX
0.25
0.4
V
IOL = 12 mA
0.35
0.5
V
IOL = 24 mA
2.3
3.0
V
IOL = 80 mA
2.0
0.8
– 0.65
VCC = VCC MIN,
VIN = VIL or VIH
per Truth
T hT
Table
bl
20
µA
VCC = MAX, VIN = 2.7 V
0.1
mA
VCC = MAX, VIN = 7.0 V
– 0.4
mA
VCC = MAX, VIN = 0.4 V
13
mA
VCC = MAX, VIN = GND
AC CHARACTERISTICS (TA = 25°C)
Limits
Symbol
tPHL
tPLH
Parameter
Min
Typ
Propagation Delay
Pn Input to Qn Output
Max
Unit
Test Conditions
50
50
ns
VCC = 5.0 V
CL = 45 pF
AC WAVEFORMS
VIN
1.3 V
tPHL
VOUT
VIN
1.3 V
1.3 V
tPLH
VOUT
1.3 V
Figure 1.
1.3 V
1.3 V
tPHL
tPLH
1.3 V
1.3 V
Figure 2.
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4
SN74LS145
PACKAGE DIMENSIONS
N SUFFIX
PLASTIC PACKAGE
CASE 648–08
ISSUE R
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: INCH.
3. DIMENSION L TO CENTER OF LEADS WHEN
FORMED PARALLEL.
4. DIMENSION B DOES NOT INCLUDE MOLD FLASH.
5. ROUNDED CORNERS OPTIONAL.
–A–
16
9
1
8
B
F
C
L
S
–T–
SEATING
PLANE
K
H
G
D
M
J
16 PL
0.25 (0.010)
M
T A
M
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5
DIM
A
B
C
D
F
G
H
J
K
L
M
S
INCHES
MIN
MAX
0.740
0.770
0.250
0.270
0.145
0.175
0.015
0.021
0.040
0.70
0.100 BSC
0.050 BSC
0.008
0.015
0.110
0.130
0.295
0.305
0_
10 _
0.020
0.040
MILLIMETERS
MIN
MAX
18.80
19.55
6.35
6.85
3.69
4.44
0.39
0.53
1.02
1.77
2.54 BSC
1.27 BSC
0.21
0.38
2.80
3.30
7.50
7.74
0_
10 _
0.51
1.01
SN74LS145
PACKAGE DIMENSIONS
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
ISSUE J
–A–
16
9
1
8
–B–
P
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
5. DIMENSION D DOES NOT INCLUDE DAMBAR
PROTRUSION. ALLOWABLE DAMBAR
PROTRUSION SHALL BE 0.127 (0.005) TOTAL
IN EXCESS OF THE D DIMENSION AT
MAXIMUM MATERIAL CONDITION.
8 PL
0.25 (0.010)
M
B
S
G
R
K
F
X 45 _
C
–T–
SEATING
PLANE
J
M
D
16 PL
0.25 (0.010)
M
T B
S
A
S
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6
DIM
A
B
C
D
F
G
J
K
M
P
R
MILLIMETERS
MIN
MAX
9.80
10.00
3.80
4.00
1.35
1.75
0.35
0.49
0.40
1.25
1.27 BSC
0.19
0.25
0.10
0.25
0_
7_
5.80
6.20
0.25
0.50
INCHES
MIN
MAX
0.386
0.393
0.150
0.157
0.054
0.068
0.014
0.019
0.016
0.049
0.050 BSC
0.008
0.009
0.004
0.009
0_
7_
0.229
0.244
0.010
0.019
SN74LS145
Notes
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7
SN74LS145
ON Semiconductor and
are trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes
without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular
purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability,
including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be
validated for each customer application by customer’s technical experts. SCILLC does not convey any license under its patent rights nor the rights of others.
SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications
intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or
death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold
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attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim
alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer.
PUBLICATION ORDERING INFORMATION
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8
SN74LS145/D