TL/F/9481
54F/74F151A 8-Input Multiplexer
November 1994
54F/74F151A
8-Input Multiplexer
General Description
The ’F151A is a high-speed 8-input digital multiplexer. It pro-
vides in one package the ability to select one line of data
from up to eight sources. The ’F151A can be used as a
universal function generator to generate any logic function
of four variables. Both assertion and negation outputs are
provided.
Commercial Military Package Package Description
Number
74F151APC N16E 16-Lead (0.300×Wide) Molded Dual-In-Line
54F151ADM (Note 2) J16A 16-Lead Ceramic Dual-In-Line
74F151ASC (Note 1) M16A 16-Lead (0.150×Wide) Molded Small Outline, JEDEC
74F151ASJ (Note 1) M16D 16-Lead (0.300×Wide) Molded Small Outline, EIAJ
54F151AFM (Note 2) W16A 16-Lead Cerpack
54F151ALM (Note 2) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C
Note 1: Devices also available in 13×reel. Use suffix eSCX and SJX.
Note 2: Military grade device with environmental and burn-in processing. Use suffix eDQMB, FMQB and LMQB.
Logic Symbols Connection Diagrams
TL/F/94813
IEEE/IEC
TL/F/94815
Pin Assignment for DIP,
SOIC and Flatpak
TL/F/94811
Pin Assignment
for LCC
TL/F/94812
TRI-STATEÉis a registered trademark of National Semiconductor Corporation.
C1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.
Unit Loading/Fan Out
54F/74F
Pin Names Description U.L. Input IIH/IIL
HIGH/LOW Output IOH/IOL
I0–I7Data Inputs 1.0/1.0 20 mA/b0.6 mA
S0–S2Select Inputs 1.0/1.0 20 mA/b0.6 mA
EEnable Input (Active LOW) 1.0/1.0 20 mA/b0.6 mA
Z Data Output 50/33.3 b1 mA/20 mA
ZInverted Data Output 50/33.3 b1 mA/20 mA
Functional Description
The ’F151A is a logic implementation of a single pole, 8-po-
sition switch with the switch position controlled by the state
of three Select inputs, S0,S
1
,S
2
. Both assertion and nega-
tion outputs are provided. The Enable input (E) is active
LOW. When it is not activated, the negation output is HIGH
and the assertion output is LOW regardless of all other in-
puts. The logic function provided at the output is:
ZeE#(I0S2S1S0aI1S2S1S0aI2S2S1S0a
I3S2S1S0aI4S2S1S0aI5S2S1S0a
I6S2S1S0aI7S2S1S0)
The ’F151A provides the ability, in one package, to select
from eight sources of data or control information. By proper
manipulation of the inputs, the ’F151A can provide any logic
function of four variables and its negation.
Truth Table
Inputs Outputs
E S2S1S0Z Z
HXXXHL
LLLLI
0I
0
LLLHI
1I
1
LLHLI
2I
2
LLHHI
3I
3
LHL LI
4I
4
LHLHI
5I
5
LHH LI
6I
6
LHHHI
7I
7
H
e
HIGH Voltage Level
LeLOW Voltage Level
XeImmaterial
Logic Diagram
TL/F/94814
Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.
2
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Storage Temperature b65§Ctoa
150§C
Ambient Temperature under Bias b55§Ctoa
125§C
Junction Temperature under Bias b55§Ctoa
175§C
Plastic b55§Ctoa
150§C
VCC Pin Potential to
Ground Pin b0.5V to a7.0V
Input Voltage (Note 2) b0.5V to a7.0V
Input Current (Note 2) b30 mA to a5.0 mA
Voltage Applied to Output
in HIGH State (with VCC e0V)
Standard Output b0.5V to VCC
TRI-STATEÉOutput b0.5V to a5.5V
Current Applied to Output
in LOW State (Max) twice the rated IOL (mA)
Note 1: Absolute maximum ratings are values beyond which the device may
be damaged or have its useful life impaired. Functional operation under
these conditions is not implied.
Note 2: Either voltage limit or current limit is sufficient to protect inputs.
Recommended Operating
Conditions
Free Air Ambient Temperature
Military b55§Ctoa
125§C
Commercial 0§Ctoa
70§C
Supply Voltage
Military a4.5V to a5.5V
Commercial a4.5V to a5.5V
DC Electrical Characteristics
Symbol Parameter 54F/74F Units VCC Conditions
Min Typ Max
VIH Input HIGH Voltage 2.0 V Recognized as a HIGH Signal
VIL Input LOW Voltage 0.8 V Recognized as a LOW Signal
VCD Input Clamp Diode Voltage b1.2 V Min IIN eb
18 mA
VOH Output HIGH 54F 10% VCC 2.5 IOH eb
1mA
Voltage 74F 10% VCC 2.5 V Min IOH eb
1mA
74F 5% VCC 2.7 IOH eb
1mA
V
OL Output LOW 54F 10% VCC 0.5 V Min IOL e20 mA
Voltage 74F 10% VCC 0.5 IOL e20 mA
IIH Input HIGH 54F 20.0
mA Max VIN e2.7V
Current 74F 5.0
IBVI Input HIGH Current 54F 100
mA Max VIN e7.0V
Breakdown Test 74F 7.0
ICEX Output HIGH 54F 250
mA Max VOUT eVCC
Leakage Current 74F 50
VID Input Leakage 74F 4.75 V 0.0 IID e1.9 mA
Test All Other Pins Grounded
IOD Output Leakage 74F 3.75 mA 0.0 VIOD e150 mV
Circuit Current All Other Pins Grounded
IIL Input LOW Current b0.6 mA Max VIN e0.5V
IOS Output Short-Circuit Current b60 b150 mA Max VOUT e0V
ICC Power Supply Current 13.5 21.0 mA Max VOeHIGH
3
AC Electrical Characteristics
74F 54F 74F
TAea
25§CTA,V
CC eMil TA,V
CC eCom
Symbol Parameter VCC ea
5.0V CLe50 pF CLe50 pF Units
CLe50 pF
Min Typ Max Min Max Min Max
tPLH Propagation Delay 4.0 6.2 9.0 3.5 11.5 3.5 9.5 ns
tPHL Snto Z 3.2 5.2 7.5 3.0 8.0 3.2 7.5
tPLH Propagation Delay 4.5 7.5 10.5 4.5 13.5 4.5 12.0 ns
tPHL Snto Z 4.0 6.2 9.0 4.0 9.5 4.0 9.0
tPLH Propagation Delay 3.0 4.7 6.1 3.0 7.5 3.0 7.0 ns
tPHL E to Z 3.0 4.4 6.0 2.5 6.5 2.5 6.0
tPLH Propagation Delay 5.0 7.0 9.5 4.0 12.0 4.0 10.5 ns
tPHL E to Z 3.5 5.3 7.0 3.0 8.0 3.0 7.5
tPLH Propagation Delay 3.0 4.8 6.5 2.5 7.5 3.0 7.0 ns
tPHL Into Z 1.5 2.5 4.0 1.5 6.0 1.5 5.0
tPLH Propagation Delay 3.0 4.8 6.5 2.5 8.5 2.5 7.5 ns
tPHL Into Z 3.7 5.5 7.0 3.5 9.0 3.7 7.5
Ordering Information
74F 151A S C X
Temperature Range Family Special Variations
74F eCommercial QB eMilitary grade device with
54F eMilitary environmental and burn-in
processing
Device Type XeDevices shipped in 13×reel
Package Code Temperature Range
PePlastic DIP CeCommercial (0§Ctoa
70§C)
DeCeramic DIP MeMilitary (b55§Ctoa
125§C)
FeFlatpak
LeLeadless Chip Carrier (LCC)
SeSmall Outline SOIC JEDEC
SJ eSmall Outline SOIC EIAJ
4
Physical Dimensions inches (millimeters)
20-Lead Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
16-Lead Ceramic Dual In-Line Package (D)
NS Package Number J16A
5
Physical Dimensions inches (millimeters) (Continued)
16-Lead (0.150×Wide) Molded Small Outline Package, JEDEC (S)
NS Package Number M16A
6
Physical Dimensions inches (millimeters) (Continued)
16-Lead (0.300×Wide) Molded Small Outline Package, EIAJ (SJ)
NS Package Number M16D
16-Lead (0.300×Wide) Molded Dual In-Line Package (P)
NS Package Number N16E
7
54F/74F151A 8-Input Multiplexer
Physical Dimensions inches (millimeters) (Continued)
16-Lead Ceramic Flatpak (F)
NS Package Number W16A
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