NSC 74F14

54F/74F14
Hex Inverter Schmitt Trigger
General Description
The ’F14 contains six logic inverters which accept standard
TTL input signals and provide standard TTL output levels.
They are capable of transforming slowly changing input signals into sharply defined, jitter-free output signals. In addition, they have a greater noise margin than conventional
inverters.
Each circuit contains a Schmitt trigger followed by a Darlington level shifter and a phase splitter driving a TTL totempole output. The Schmitt trigger uses positive feed back to
effectively speed-up slow input transition, and provide different input threshold voltages for positive and negative-going
transitions. This hysteresis between the positive-going and
negative-going input thresholds (typically 800 mV) is determined internally by resistor ratios and is essentially insensitive to temperature and supply voltage variations.
Features
Y
Y
Commercial
Military
Guaranteed 4000V minimum ESD protection
Standard Military Drawing
Ð 5962-88752
Package
Number
Package Description
N14A
14-Lead (0.300× Wide) Molded Dual-In-Line
J14A
14-Lead Ceramic Dual-In-Line
74F14SC (Note 1)
M14A
14-Lead (0.150× Wide) Molded Small Outline, JEDEC
74F14SJ (Note 1)
M14D
14-Lead (0.300× Wide) Molded Small Outline, EIAJ
54F14FM (Note 2)
W14B
14-Lead Cerpack
54F14LM (Note 2)
E20A
20-Lead Ceramic Leadless Chip Carrier, Type C
74F14PC
54F14DM (Note 2)
Note 1: Devices also available in 13× reel. Use Suffix e SCX and SJX.
Note 2: Military grade device with environmental and burn-in processing. Use suffix e DMQB, FMQB and LMQB.
Logic Symbol
Connection Diagrams
Pin Assignment
DIP, SOIC and Flatpak
IEEE/IEC
Pin Assignment
for LCC
TL/F/9461 – 1
TL/F/9461 – 2
TL/F/9461–3
TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.
C1995 National Semiconductor Corporation
TL/F/9461
RRD-B30M75/Printed in U. S. A.
54F/74F14 Hex Inverter Schmitt Trigger
December 1994
Unit Loading/Fan Out
54F/74F
Pin Names
Description
In
On
Input
Output
U.L.
HIGH/LOW
Input IIH/IIL
Output IOH/IOL
1.0/1.0
50/33.3
20 mA/b0.6 mA
b 1 mA/20 mA
Function Table
Input
Output
A
O
L
H
H
L
H e HIGH Voltage Level
L e LOW Voltage Level
2
Absolute Maximum Ratings (Note 1)
Recommended Operating
Conditions
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.
Storage Temperature
b 65§ C to a 150§ C
Ambient Temperature under Bias
Junction Temperature under Bias
VCC Pin Potential to
Ground Pin
b 55§ C to a 125§ C
Free Air Ambient Temperature
Military
Commercial
Supply Voltage
Military
Commercial
b 55§ C to a 175§ C
b 55§ C to a 125§ C
0§ C to a 70§ C
a 4.5V to a 5.5V
a 4.5V to a 5.5V
b 0.5V to a 7.0V
b 0.5V to a 7.0V
Input Voltage (Note 2)
b 30 mA to a 5.0 mA
Input Current (Note 2)
Voltage Applied to Output
in HIGH State (with VCC e 0V)
b 0.5V to VCC
Standard Output
b 0.5V to a 5.5V
TRI-STATEÉ Output
Current Applied to Output
in LOW State (Max)
twice the rated IOL (mA)
ESD Last Passing Voltage (Min)
4000V
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.
DC Electrical Characteristics
Symbol
54F/74F
Parameter
Min
Typ
Max
Units
VCC
5.0V
Conditions
VT a
Positive-Going Threshold
1.5
1.7
2.0
V
VTb
Negative-Going Threshold
0.7
0.9
1.1
V
5.0V
DVT
Hysteresis (VT a – VTb)
0.4
0.8
V
5.0V
VCD
Input Clamp Diode Voltage
V
Min
IIN e b18 mA
VOH
Output HIGH
Voltage
54F 10% VCC
74F 10% VCC
74F 5% VCC
V
Min
IOH e b1 mA
IOH e b1 mA
IOH e b1 mA
VOL
Output LOW
Voltage
54F 10% VCC
74F 10% VCC
0.5
0.5
V
Min
IOL e 20 mA
IOL e 20 mA
IIH
Input HIGH
Current
54F
74F
20.0
5.0
mA
Max
VIN e 2.7V
IBVI
Input HIGH Current
Breakdown Test
54F
74F
100
7.0
mA
Max
VIN e 7.0V
ICEX
Output HIGH
Leakage Current
54F
74F
250
50
mA
Max
VOUT e VCC
VID
Input Leakage
Test
74F
V
Max
IID e 1.9 mA
All Other Pins Grounded
IOD
Output Leakage
Circuit Current
74F
mA
0.0
VIOD e 150 mV
All Other Pins Grounded
IIL
Input LOW Current
IOS
Output Short-Circuit Current
ICCH
ICCL
b 1.2
2.5
2.5
2.7
4.75
3.75
b 0.6
mA
Max
VIN e 0.5V
b 150
mA
Max
VOUT e 0V
Power Supply Current
25
mA
Max
VO e HIGH
Power Supply Current
25
mA
Max
VO e LOW
b 60
3
AC Electrical Characteristics
Symbol
tPLH
tPHL
Parameter
Propagation Delay
In x On
74F
54F
74F
TA e a 25§ C
VCC e a 5.0V
CL e 50 pF
TA, VCC e Mil
CL e 50 pF
TA, VCC e Com
CL e 50 pF
Min
Max
Min
Max
Min
Max
4.0
3.5
10.5
8.5
4.0
3.5
13.0
10.0
4.0
3.5
11.5
9.0
Units
ns
Ordering Information
The device number is used to form part of a simplified purchasing code where the package type and temperature range are
defined as follows:
74F
14
S
Temperature Range Family
74F e Commercial
54F e Military
C
X
Special Variations
QB e Military grade device with
environmental and burn-in
processing
X e Devices shipped in 13× reels
Device Type
Package Code
P e Plastic DIP
D e Ceramic DIP
F e Flatpak
L e Leadless Chip Carrier (LCC)
S e Small Outline SOIC JEDEC
SJ e Small Outline SOIC EIAJ
Temperature Range
C e Commercial (0§ C to a 70§ C)
M e Military (b55§ C to a 125§ C)
4
Physical Dimensions inches (millimeters)
20-Terminal Ceramic Leadless Chip Carrier (L)
NS Package Number E20A
5
Physical Dimensions inches (millimeters) (Continued)
14-Lead Ceramic Dual-In-Line Package (D)
NS Package Number J14A
14-Lead (0.150× Wide) Molded Small Outline Package, JEDEC (S)
NS Package Number M14A
6
Physical Dimensions inches (millimeters) (Continued)
14-Lead (0.300× Wide) Molded Small Outline Package, EIAJ (SJ)
NS Package Number M14D
14-Lead (0.300× Wide) Molded Dual-In-Line Package (P)
NS Package Number N14A
7
54F/74F14 Hex Inverter Schmitt Trigger
Physical Dimensions inches (millimeters) (Continued)
14-Lead Ceramic Flatpak (F)
NS Package Number W14B
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