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Электронный компонент: 54AC14

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54AC14
Hex Inverter with Schmitt Trigger Input
General Description
The 'AC14 contains six inverter gates each with a Schmitt
trigger input. The 'AC14 contains six logic inverters which ac-
cept standard CMOS input signals and provide standard
CMOS 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.
The 'AC14 has hysteresis between the positive-going and
negative-going input thresholds (typically 1.0V) which is de-
termined internally by transistor ratios and is essentially in-
sensitive to temperature and supply voltage variations.
Features
n
I
CC
reduced by 50%
n
Outputs source/sink 24 mA
n
Standard Military Drawing (SMD)
-- 'AC14: 5962-87624
Logic Symbol
Function Table
Input
Output
A
O
L
H
H
L
FACT
TM
is a trademark of Fairchild Semiconductor Corporation.
IEEE/IEC
DS100263-1
July 1998
54AC14
Hex
Inverter
with
Schmitt
T
rigger
Input
1998 National Semiconductor Corporation
DS100263
www.national.com
Connection Diagrams
Pin Names
Description
I
n
Inputs
O
n
Outputs
Pin Assignment for
DIP and Flatpack
DS100263-2
Pin Assignment for LCC
DS100263-3
www.national.com
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.
Supply Voltage (V
CC
)
-0.5V to +7.0V
DC Input Diode Current (I
IK
)
V
I
= -0.5V
-20 mA
V
I
= V
CC
+ 0.5V
+20 mA
DC Input Voltage (V
I
)
-0.5V to V
CC
+ 0.5V
DC Output Diode Current (I
OK
)
V
O
= -0.5V
-20 mA
V
O
= V
CC
+ 0.5V
+20 mA
DC Output Voltage (V
O
)
-0.5V to V
CC
+ 0.5V
DC Output Source
or Sink Current (I
O
)
50 mA
DC V
CC
or Ground Current
per Output Pin (I
CC
or I
GND
)
50 mA
Storage Temperature (T
STG
)
-65C to +150C
Junction Temperature (T
J
)
CDIP
175C
Recommended Operating
Conditions
Supply Voltage (V
CC
)
'AC
2.0V to 6.0V
Input Voltage (V
I
)
0V to V
CC
Output Voltage (V
O
)
0V to V
CC
Operating Temperature (T
A
)
54AC
-55C to +125C
Note 1: Absolute maximum ratings are those values beyond which damage
to the device may occur. The databook specifications should be met, without
exception, to ensure that the system design is reliable over its power supply,
temperature, and output/input loading variables. National does not recom-
mend operation of FACT
TM
circuits outside databook specifications.
DC Characteristics for 'AC Family Devices
54AC
Symbol
Parameter
V
CC
T
A
= -55C to +125C
Units
Conditions
(V)
Guaranteed Limits
V
OH
Minimum High Level Output
Voltage
3.0
2.9
I
OUT
= -50 A
4.5
4.4
V
5.5
5.4
(Note 2) V
IN
= V
IL
or V
IH
3.0
2.4
-12 mA
4.5
3.7
V
I
OH
-24 mA
5.5
4.7
-24 mA
V
OL
Maximum Low Level Output
Voltage
3.0
0.1
I
OUT
= 50 A
4.5
0.1
V
5.5
0.1
(Note 2) V
IN
= V
IL
or V
IH
3.0
0.5
12 mA
4.5
0.5
V
I
OL
24 mA
5.5
0.5
24 mA
I
IN
Maximum Input
5.5
1.0
A
V
I
= V
CC
, GND
Leakage Current
V
t+
Maximum Positive
3.0
2.2
T
A
= Worst Case
Threshold
4.5
3.2
V
5.5
3.9
V
t-
Minimum Negative
3.0
0.5
T
A
= Worst Case
Threshold
4.5
0.9
V
5.5
1.1
V
h(max)
Maximum Hysteresis
3.0
1.2
T
A
= Worst Case
4.5
1.4
V
5.5
1.6
V
h(min)
Minimum Hysteresis
3.0
0.3
T
A
= Worst Case
4.5
0.4
V
5.5
0.5
3
www.national.com
DC Characteristics for 'AC Family Devices
(Continued)
54AC
Symbol
Parameter
V
CC
T
A
= -55C to +125C
Units
Conditions
(V)
Guaranteed Limits
I
OLD
(Note 3) Minimum Dynamic
Output Current
5.5
50
mA
V
OLD
= 1.65V Max
I
OHD
5.5
-50
mA
V
OHD
= 3.85V Min
I
CC
Maximum Quiescent
5.5
40.0
A
V
IN
= V
CC
Supply Current
or GND
Note 2: All outputs loaded; thresholds on input associated with output under test.
Note 3: Maximum test duration 2.0 ms, one output loaded at a time.
Note 4: I
IN
and I
CC
@
3.0V are guaranteed to be less than or equal to the respective limit
@
5.5V V
CC
.
I
CC
for 54AC
@
25C is identical to 74AC
@
25C.
AC Electrical Characteristics
54AC
V
CC
T
A
= -55C
Fig.
Symbol
Parameter
(V)
to +125C
Units
No.
(Note 5)
C
L
= 50 pF
Min
Max
t
PLH
Propagation Delay
3.3
1.0
16.0
ns
5.0
1.0
12.0
t
PHL
Propagation Delay
3.3
1.0
14.0
ns
5.0
1.5
10.0
Note 5: Voltage Range 3.3 is 3.3V
0.3V
Voltage Range 5.0 is 5.0V
0.5V
Capacitance
Symbol
Parameter
Typ
Units
Conditions
C
IN
Input Capacitance
4.5
pF
V
CC
= OPEN
C
PD
Power Dissipation
25.0
pF
V
CC
= 5.0V
Capacitance
www.national.com
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