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SN74LS138DR2 [ROCHESTER]

Decoder/Driver, LS Series, Inverted Output, TTL, PDSO16, PLASTIC, SOIC-16;
SN74LS138DR2
型号： SN74LS138DR2
厂家： Rochester Electronics    Rochester Electronics
描述：

Decoder/Driver, LS Series, Inverted Output, TTL, PDSO16, PLASTIC, SOIC-16

光电二极管
文件： 总8页 (文件大小：870K)
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SN74LS138  
1−of−8 Decoder/  
Demultiplexer  
The LSTTL/MSI SN74LS138 is a high speed 1-of-8 Decoder/  
Demultiplexer. This device is ideally suited for high speed bipolar  
memory chip select address decoding. The multiple input enables  
allow parallel expansion to a 1-of-24 decoder using just three LS138  
devices or to a 1-of-32 decoder using four LS138s and one inverter.  
The LS138 is fabricated with the Schottky barrier diode process for  
high speed and is completely compatible with all ON Semiconductor  
TTL families.  
http://onsemi.com  
LOW  
POWER  
SCHOTTKY  
• Demultiplexing Capability  
• Multiple Input Enable for Easy Expansion  
• Typical Power Dissipation of 32 mW  
• Active Low Mutually Exclusive Outputs  
• Input Clamp Diodes Limit High Speed Termination Effects  
16  
1
PLASTIC  
N SUFFIX  
CASE 648  
GUARANTEED OPERATING RANGES  
Symbol  
Parameter  
Supply Voltage  
Min  
4.75  
0
Typ  
5.0  
25  
Max  
5.25  
70  
Unit  
V
V
CC  
T
A
Operating Ambient  
Temperature Range  
°C  
16  
I
Output Current − High  
Output Current − Low  
−0.4  
mA  
mA  
OH  
1
I
8.0  
OL  
SOIC  
D SUFFIX  
CASE 751B  
16  
1
SOEIAJ  
M SUFFIX  
CASE 966  
ORDERING INFORMATION  
Device  
Package  
16 Pin DIP  
SOIC−16  
Shipping  
SN74LS138N  
SN74LS138D  
SN74LS138DR2  
SN74LS138M  
SN74LS138MEL  
2000 Units/Box  
38 Units/Rail  
2500/Tape & Reel  
See Note 1  
SOIC−16  
SOEIAJ−16  
SOEIAJ−16  
See Note 1  
1. For ordering information on the EIAJ version of  
the SOIC package, please contact your local  
ON Semiconductor representative.  
©
Semiconductor Components Industries, LLC, 2006  
1
Publication Order Number:  
June, 2006 − Rev. 8  
SN74LS138/D  
 
SN74LS138  
CONNECTION DIAGRAM DIP (TOP VIEW)  
V
O
O
O
O
O
O
O
6
CC  
0
1
2
3
4
5
16  
15  
14  
13  
12  
11  
10  
9
NOTE:  
The Flatpak version has the same  
pinouts (Connection Diagram) as  
the Dual In-Line Package.  
1
2
3
4
5
6
8
7
A
A
A
E
E
E
O
7
GND  
0
1
2
1
2
3
LOADING (Note a)  
HIGH  
LOW  
PIN NAMES  
A − A  
E , E  
Address Inputs  
0.5 U.L.  
0.5 U.L.  
0.5 U.L.  
10 U.L.  
0.25 U.L.  
0.25 U.L.  
0.25 U.L.  
5 U.L.  
0
2
Enable (Active LOW) Inputs  
Enable (Active HIGH) Input  
Active LOW Outputs  
1
2
E
O − O  
3
0
7
NOTES:  
ꢀa) 1 TTL Unit Load (U.L.) = 40 mA HIGH/1.6 mA LOW.  
LOGIC SYMBOL  
1 2 3  
4 5 6  
1 2 3  
A
A
A
E
0
1
2
O
O
O
O
O
O O O  
4 5 6 7  
0
1
2
3
15 14 13 12 11 10  
9 7  
V
= PIN 16  
CC  
GND = PIN 8  
LOGIC DIAGRAM  
A
A
A
E
E
E
3
2
1
0
1
2
3
2
1
4
5
6
V
= PIN 16  
CC  
GND = PIN 8  
= Pin Numbers  
7
9
10  
11  
12  
13  
14  
15  
O
O
O
O
O
O
O
O
0
7
6
5
4
3
2
1
http://onsemi.com  
2
SN74LS138  
FUNCTIONAL DESCRIPTION  
The LS138 is a high speed 1-of-8 Decoder/Demultiplexer  
fabricated with the low power Schottky barrier diode  
process. The decoder accepts three binary weighted inputs  
function allows easy parallel expansion of the device to a  
1-of-32 (5 lines to 32 lines) decoder with just four LS138s  
and one inverter. (See Figure a.)  
(A , A , A ) and when enabled provides eight mutually  
The LS138 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 state.  
0
1
2
exclusive active LOW Outputs (O −O ). The LS138  
0
7
features three Enable inputs, two active LOW (E , E ) and  
1
2
one active HIGH (E ). All outputs will be HIGH unless E  
3
1
and E are LOW and E is HIGH. This multiple enable  
2
3
TRUTH TABLE  
INPUTS  
OUTPUTS  
E
E
E
A
0
A
1
A
2
O
O
O
O
O
O
O
O
7
1
2
3
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
A
0
1
2
LS04  
A
A
3
4
H
1 2 3  
1 2 3  
1 2 3  
1 2 3  
A
A
A
E
A
A
A
E
A
A
A
E
A
A
A
2
E
0
1
2
0
1
2
0
1
2
0
1
LS138  
LS138  
LS138  
LS138  
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
O
O
O
O
O
O
O
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
4
5
6
O
O
31  
0
Figure a  
http://onsemi.com  
3
SN74LS138  
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)  
Limits  
Min  
Typ  
Max  
Symbol  
Parameter  
Input HIGH Voltage  
Unit  
Test Conditions  
Guaranteed Input HIGH Voltage for  
All Inputs  
V
2.0  
V
IH  
0.8  
Guaranteed Input LOW Voltage for  
All Inputs  
V
V
V
Input LOW Voltage  
V
IL  
Input Clamp Diode Voltage  
Output HIGH Voltage  
−0.65  
−1.5  
V
V
V
V
= MIN, I = −18 mA  
IN  
IK  
CC  
2.7  
3.5  
= MIN, I = MAX, V = V  
OH IN  
CC  
IH  
OH  
or V per Truth Table  
IL  
V
V
= V MIN,  
0.25  
0.35  
0.4  
V
I
I
= 4.0 mA  
= 8.0 mA  
CC  
CC  
OL  
OL  
V
Output LOW Voltage  
Input HIGH Current  
= V or V  
OL  
IN  
IL  
IH  
0.5  
20  
V
per Truth Table  
μA  
V
V
V
V
V
= MAX, V = 2.7 V  
IN  
CC  
CC  
CC  
CC  
CC  
I
IH  
0.1  
mA  
mA  
mA  
mA  
= MAX, V = 7.0 V  
IN  
I
I
I
Input LOW Current  
−0.4  
−100  
10  
= MAX, V = 0.4 V  
IL  
IN  
Short Circuit Current (Note 2)  
Power Supply Current  
−20  
= MAX  
= MAX  
OS  
CC  
2. Not more than one output should be shorted at a time, nor for more than 1 second.  
AC CHARACTERISTICS (T = 25°C)  
A
Limits  
Levels of  
Delay  
Min  
Typ  
Max  
Symbol  
Parameter  
Propagation Delay  
Address to Output  
Unit  
Test Conditions  
t
t
2
2
13  
27  
20  
41  
PLH  
ns  
PHL  
t
t
Propagation Delay  
Address to Output  
3
3
18  
26  
27  
39  
PLH  
PHL  
ns  
ns  
ns  
V
= 5.0 V  
CC  
C = 15 pF  
L
t
t
Propagation Delay E or E  
Enable to Output  
2
2
12  
21  
18  
32  
PLH  
PHL  
1
2
t
t
Propagation Delay E  
Enable to Output  
3
3
17  
25  
26  
38  
PLH  
PHL  
3
AC WAVEFORMS  
V
IN  
1.3 V  
1.3 V  
1.3 V  
1.3 V  
V
V
IN  
t
t
PLH  
PHL  
t
t
PLH  
PHL  
OUT  
V
1.3 V  
1.3 V  
OUT  
1.3 V  
1.3 V  
Figure 1.  
Figure 2.  
http://onsemi.com  
4
 
SN74LS138  
PACKAGE DIMENSIONS  
N SUFFIX  
PLASTIC PACKAGE  
CASE 648−08  
ISSUE R  
NOTES:  
1. DIMENSIONING AND TOLERANCING PER ANSI  
Y14.5M, 1982.  
−A−  
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  
MILLIMETERS  
MIN  
18.80  
6.35  
3.69  
0.39  
1.02  
MAX  
19.55  
6.85  
4.44  
0.53  
1.77  
F
A
B
C
D
F
0.740  
0.250  
0.145  
0.015  
0.040  
0.770  
0.270  
0.175  
0.021  
0.70  
C
L
SEATING  
PLANE  
−T−  
G
H
J
0.100 BSC  
0.050 BSC  
2.54 BSC  
1.27 BSC  
K
M
0.008  
0.015  
0.130  
0.305  
10  
0.21  
0.38  
3.30  
7.74  
10  
H
J
K
L
0.110  
0.295  
0
2.80  
7.50  
0
G
D 16 PL  
M
S
_
_
_
_
0.020  
0.040  
0.51  
1.01  
M
M
0.25 (0.010)  
T A  
http://onsemi.com  
5
SN74LS138  
PACKAGE DIMENSIONS  
D SUFFIX  
PLASTIC SOIC PACKAGE  
CASE 751B−05  
ISSUE J  
−A−  
NOTES:  
1. DIMENSIONING AND TOLERANCING PER ANSI  
Y14.5M, 1982.  
16  
9
8
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.  
−B−  
P 8 PL  
M
S
B
0.25 (0.010)  
1
G
MILLIMETERS  
INCHES  
MIN  
DIM MIN  
MAX  
10.00  
4.00  
1.75  
0.49  
1.25  
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  
0.386  
0.150  
0.054  
0.014  
0.016  
R X 45  
K
_
C
G
J
1.27 BSC  
0.050 BSC  
−T−  
SEATING  
PLANE  
0.19  
0.10  
0
0.25  
0.25  
7
0.008  
0.004  
0
0.009  
0.009  
7
J
M
K
M
P
R
D
16 PL  
_
_
_
_
5.80  
0.25  
6.20  
0.50  
0.229  
0.010  
0.244  
0.019  
M
S
S
0.25 (0.010)  
T
B
A
http://onsemi.com  
6
SN74LS138  
PACKAGE DIMENSIONS  
M SUFFIX  
SOEIAJ PACKAGE  
CASE 966−01  
ISSUE O  
NOTES:  
1. DIMENSIONING AND TOLERANCING PER ANSI  
Y14.5M, 1982.  
2. CONTROLLING DIMENSION: MILLIMETER.  
3. DIMENSIONS D AND E DO NOT INCLUDE MOLD  
FLASH OR PROTRUSIONS AND ARE MEASURED  
AT THE PARTING LINE. MOLD FLASH OR  
PROTRUSIONS SHALL NOT EXCEED 0.15 (0.006)  
PER SIDE.  
L
16  
9
E
Q
1
H
E
E
M
_
4. TERMINAL NUMBERS ARE SHOWN FOR  
REFERENCE ONLY.  
5. THE LEAD WIDTH DIMENSION (b) DOES NOT  
INCLUDE DAMBAR PROTRUSION. ALLOWABLE  
DAMBAR PROTRUSION SHALL BE 0.08 (0.003)  
TOTAL IN EXCESS OF THE LEAD WIDTH  
DIMENSION AT MAXIMUM MATERIAL CONDITION.  
DAMBAR CANNOT BE LOCATED ON THE LOWER  
RADIUS OR THE FOOT. MINIMUM SPACE  
BETWEEN PROTRUSIONS AND ADJACENT LEAD  
TO BE 0.46 ( 0.018).  
1
8
L
DETAIL P  
Z
D
VIEW P  
e
MILLIMETERS  
INCHES  
MIN MAX  
−−− 0.081  
A
DIM MIN  
MAX  
2.05  
0.20  
0.50  
0.27  
10.50  
5.45  
c
A
−−−  
0.05  
0.35  
0.18  
9.90  
5.10  
A
1
0.002  
0.008  
0.020  
0.011  
0.413  
0.215  
b
c
0.014  
0.007  
0.390  
0.201  
D
E
A
1
b
0.13 (0.005)  
e
1.27 BSC  
0.050 BSC  
0.10 (0.004)  
M
H
7.40  
0.50  
1.10  
8.20  
0.85  
1.50  
0.291  
0.020  
0.043  
0.323  
0.033  
0.059  
E
L
L
E
0
0.70  
−−−  
10  
10  
0.035  
−−− 0.031  
M
Q
0
0.028  
_
_
_
_
0.90  
0.78  
1
Z
ON Semiconductor and  
are registered 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 SCILLC and its officers, employees, subsidiaries, affiliates,  
and distributors harmless against all claims, costs, damages, and expenses, and reasonable 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. This literature is subject to all applicable copyright laws and is not for resale in any manner.  
PUBLICATION ORDERING INFORMATION  
LITERATURE FULFILLMENT:  
N. American Technical Support: 800−282−9855 Toll Free  
USA/Canada  
Europe, Middle East and Africa Technical Support:  
Phone: 421 33 790 2910  
Japan Customer Focus Center  
Phone: 81−3−5773−3850  
ON Semiconductor Website: www.onsemi.com  
Order Literature: http://www.onsemi.com/orderlit  
Literature Distribution Center for ON Semiconductor  
P.O. Box 5163, Denver, Colorado 80217 USA  
Phone: 303−675−2175 or 800−344−3860 Toll Free USA/Canada  
Fax: 303−675−2176 or 800−344−3867 Toll Free USA/Canada  
Email: orderlit@onsemi.com  
For additional information, please contact your local  
Sales Representative  
SN74LS138/D  

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