SN74LS145 [ONSEMI]
1-of-10 Decoder / Drvier Open-Collector; 1 -OF- 10解码器/ Drvier集电极开路
| 型号： | SN74LS145 |
| 厂家： | 
ONSEMI |
| 描述： | 1-of-10 Decoder / Drvier Open-Collector |
| 文件： | 总8页 (文件大小：108K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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
Parameter
Supply Voltage
Min
4.75
0
Typ
5.0
25
Max
5.25
70
Unit
V
V
CC
16
T
A
Operating Ambient
Temperature Range
°C
1
PLASTIC
N SUFFIX
CASE 648
V
Output Voltage – High
Output Current – Low
15
24
V
OH
OL
I
mA
16
1
SOIC
D SUFFIX
CASE 751B
ORDERING INFORMATION
Device
Package
16 Pin DIP
16 Pin
Shipping
SN74LS145N
SN74LS145D
2000 Units/Box
2500/Tape & Reel
Semiconductor Components Industries, LLC, 1999
1
Publication Order Number:
December, 1999 – Rev. 6
SN74LS145/D
SN74LS145
CONNECTION DIAGRAM DIP (TOP VIEW)
V
CC
P
0
P
1
P
2
P
3
Q
Q
Q
7
9
8
16
15
14
13
12
11
10
9
1
2
3
4
5
6
8
7
Q
Q
Q
Q
Q
Q
Q
6
GND
0
1
2
3
4
5
LOADING (Note a)
HIGH
LOW
PIN NAMES
P , P , P , P
BCD Inputs
Outputs
0.5 U.L.
Open Collector
0.25 U.L.
15 U.L.
0
1
2
3
Q – Q
0
9
NOTES:
a) 1 TTL Unit Load (U.L.) = 40 A HIGH/1.6 mA LOW.
LOGIC SYMBOL
15 14 13 12
P
0
P P P
1 2 3
Q
0
Q Q Q Q Q Q Q Q Q
1 2 3 4 5 6 7 8 9
1
2
3
4
5
6 7 9 10 11
V
CC
= PIN 16
GND = PIN 8
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2
SN74LS145
LOGIC DIAGRAM
INPUTS
P
0
P
1
P
2
P
3
INPUT
INVERTERS
0
0
1
1
2
2
3
3
DECODE/DRIVER
GATES
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
9
0
1
2
3
4
5
6
7
8
OUTPUTS
TRUTH TABLE
INPUTS
OUTPUTS
P
3
P
2
P
1
P
0
Q
Q
Q
Q
Q
Q
Q
Q
Q
Q
9
0
1
2
3
4
5
6
7
8
L
L
L
L
L
H
H
H
H
H
H
H
H
H
L
L
L
L
L
L
L
L
H
H
H
H
L
L
L
L
H
H
H
H
L
H
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
L
H
H
L
H
H
H
L
H
H
H
H
L
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
L
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
L
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
H
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
L
L
H
H
L
H
H
H
H
H
H
H
H
L
H
H
L
L
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
Input HIGH Voltage
Unit
Test Conditions
Min
Typ
Max
Guaranteed Input HIGH Voltage for
All Inputs
V
2.0
V
IH
0.8
Guaranteed Input LOW Voltage for
All Inputs
V
V
Input LOW Voltage
V
IL
Input Clamp Diode Voltage
Output HIGH Current
–0.65
–1.5
250
0.4
0.5
3.0
20
V
µA
V
V
CC
V
CC
= MIN, I = –18 mA
IN
IK
I
= MIN, V = MAX
OH
OH
0.25
0.35
2.3
I
OL
I
OL
I
OL
= 12 mA
= 24 mA
= 80 mA
V
V
= V MIN,
CC
CC
V
OL
Output LOW Voltage
= V or V
IH
V
IN
IL
per Truth Table
V
µA
mA
mA
mA
V
CC
V
CC
V
CC
V
CC
= MAX, V = 2.7 V
IN
I
IH
Input HIGH Current
0.1
–0.4
13
= MAX, V = 7.0 V
IN
I
I
Input LOW Current
= MAX, V = 0.4 V
IN
IL
Power Supply Current
= MAX, V = GND
IN
CC
AC CHARACTERISTICS (T = 25°C)
A
Limits
Typ
Symbol
Parameter
Unit
Test Conditions
= 5.0 V
Min
Max
t
t
Propagation Delay
50
50
V
CC
PHL
PLH
ns
P Input to Q Output
C = 45 pF
L
n
n
AC WAVEFORMS
V
IN
1.3 V
1.3 V
V
IN
1.3 V
1.3 V
t
t
PLH
t
t
PLH
PHL
PHL
V
OUT
1.3 V
1.3 V
V
OUT
1.3 V
1.3 V
Figure 1.
Figure 2.
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4
SN74LS145
PACKAGE DIMENSIONS
N SUFFIX
PLASTIC PACKAGE
CASE 648–08
ISSUE R
NOTES:
–A–
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.
16
1
9
8
B
S
INCHES
DIM MIN MAX
0.740 0.770 18.80 19.55
MILLIMETERS
MIN MAX
F
A
B
C
D
F
C
L
0.250 0.270
0.145 0.175
0.015 0.021
6.35
3.69
0.39
1.02
6.85
4.44
0.53
1.77
0.040
0.70
SEATING
–T–
G
H
J
K
L
M
S
0.100 BSC
0.050 BSC
0.008 0.015
2.54 BSC
1.27 BSC
PLANE
K
M
0.21
0.38
3.30
7.74
10
H
J
0.110
0.295 0.305
10
0.020 0.040
0.130
2.80
7.50
0
G
D 16 PL
0
0.51
1.01
M
M
0.25 (0.010)
T A
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5
SN74LS145
PACKAGE DIMENSIONS
D SUFFIX
PLASTIC SOIC PACKAGE
CASE 751B–05
ISSUE J
–A–
NOTES:
1. DIMENSIONING AND TOLERANCING PER ANSI
Y14.5M, 1982.
2. CONTROLLING DIMENSION: MILLIMETER.
3. DIMENSIONS A AND B DO NOT INCLUDE
MOLD PROTRUSION.
16
1
9
8
–B–
P 8 PL
4. MAXIMUM MOLD PROTRUSION 0.15 (0.006)
PER SIDE.
M
S
0.25 (0.010)
B
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.
G
MILLIMETERS
DIM MIN MAX
INCHES
MIN
MAX
0.393
0.157
0.068
0.019
0.049
F
A
B
C
D
F
9.80
3.80
1.35
0.35
0.40
10.00 0.386
4.00 0.150
1.75 0.054
0.49 0.014
1.25 0.016
R X 45
K
C
G
J
K
M
P
1.27 BSC
0.050 BSC
–T–
SEATING
PLANE
0.19
0.10
0
0.25 0.008
0.25 0.004
0.009
0.009
7
J
M
D
16 PL
7
0
5.80
0.25
6.20 0.229
0.50 0.010
0.244
0.019
M
S
S
0.25 (0.010)
T B
A
R
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6
SN74LS145
Notes
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7
SN74LS145
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SN74LS145/D
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