SCHMITT TRIGGERS DUAL 4-INPUT
NAND/HEX INVERTERS
The MC54/74F13 and MC54/74F14 contain logic gates/inverters which ac-
cept standard TTL input signals and provide standard TTL output levels. They
are capable of transforming slowly changing input signals into sharply de-
fined, jitter-free output signals. Additionally, they have 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 totem pole output. The Schmitt trigger uses
positive feedback to effectively speed up slow input transitions and provide
different input threshold voltages for positive and negative-going transitions.
This hysteresis between the positive-going and negative-going input thresh-
olds (typically 800 mV) is determined internally by resistor ratios and is essen-
tially insensitive to temperature and supply voltage variations.
LOGIC AND CONNECTION DIAGRAMS
14
MC54/74F13
MC54/74F14
SCHMITT TRIGGERS
DUAL 4-INPUT
NAND/HEX INVERTERS
FAST™ SCHOTTKY TTL
J SUFFIX
CERAMIC
CASE 632-08
1
MC54/74F13
VCC
14
D
13
C
12
N/C
11
B
10
A
9
O
8
14
1
N SUFFIX
PLASTIC
CASE 646-06
1
A
2
B
3
N/C
4
C
5
D
6
O
7
GND
14
1
D SUFFIX
SOIC
CASE 751A-02
MC54/74F14
VCC
14
A
13
O
12
A
11
O
10
A
9
O
8
ORDERING INFORMATION
MC54FXXJ
MC74FXXN
MC74FXXD
Ceramic
Plastic
SOIC
1
A
2
O
3
A
4
O
5
A
6
O
7
GND
GUARANTEED OPERATING RANGES
Symbol
VCC
TA
Supply Voltage
Operating Ambient Temperature Range
Parameter
54, 74
54
74
IOH
IOL
Output Current — High
Output Current — Low
54, 74
54, 74
Min
4.5
–55
0
Typ
5.0
25
25
Max
5.5
125
70
–1.0
20
mA
mA
Unit
V
°C
FAST AND LS TTL DATA
4-14
MC54/74F13
•
MC54/74F14
DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE
(unless otherwise specified)
Limits
Symbol
VT+
VT–
VT+–VT–
VIH
VIL
VIK
VOH
Parameter
Positive-Going Threshold Voltage
Negative-Going Threshold Voltage
Hysteresis
Input HIGH Voltage
Input LOW Voltage
Input Clamp Diode Voltage
Output HIGH Voltage
54, 74
74
VOL
IT+
IT–
IIH
Output LOW Voltage
Input Current at Positive-Going Threshold
Input Current at Negative-Going Threshold
Input HIGH Current
–0.14
–0.18
20
0.1
IIL
IOS
ICCH
Input LOW Current
Output Short Circuit Current (Note 2)
Power Supply Current
Total, Output HIGH
ICCL
Power Supply Current
Total, Output LOW
F13
F14
F13
F14
–60
4.5
13
7.0
23
–0.6
–150
8.5
22
10
32
mA
VCC = MAX
2.5
2.7
0.5
Min
1.5
0.7
0.4
2.0
0.8
–1.2
0.8
Typ
Max
2.0
1.1
Unit
V
V
V
V
V
V
V
V
V
mA
mA
µA
mA
mA
mA
Test Conditions
VCC = 5.0 V
VCC = 5.0 V
VCC = 5.0 V
Guaranteed Input HIGH Voltage
Guaranteed Input LOW Voltage
VCC = MIN, IIN = –18 mA
IOH = –1.0 mA
IOH = –1.0 mA
IOL = 20 mA
VCC = 4.5
VCC = 4.75
VCC = MIN
VCC = 5.0 V, VIN = VT+
VCC = 5.0 V, VIN = VT–
VCC = MAX, VIN = 2.7 V
VCC = MAX, VIN = 7.0 V
VCC = MAX, VIN = 0.5 V
VCC = MAX, VOUT = 0 V
NOTES:
1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.
2. Not more than one output should be shorted at a time, nor for more than 1 second.
AC CHARACTERISTICS
(CL = 50 pF)
54/74F
TA = +25°C
VCC = +5.0 V
Symbol
tPLH
tPHL
tPLH
tPHL
Propagation Delay
F14
Parameter
Propagation Delay
F13
Min
3.5
3.0
3.5
3.0
Max
7.0
8.0
7.0
6.5
54F
TA = –55°C to +125°C
VCC = 5.0 V
±
10%
Min
3.5
3.0
3.5
3.0
Max
9.0
9.5
9.0
8.0
74F
TA = 0°C to 70°C
VCC = 5.0 V
±
10%
Min
3.5
3.0
3.5
3.0
Max
8.0
8.5
8.0
7.0
ns
Unit
ns
FAST AND LS TTL DATA
4-15
MC54/74F13
•
MC54/74F14
FUNCTION TABLE MC54/74F13
Inputs
Output
FUNCTION TABLE MC54/74F14
Input
A
L
H
Output
O
H
L
A
L
X
X
X
H
B
X
L
X
X
H
C
X
X
L
X
H
D
X
X
X
L
H
O
H
H
H
H
L
H = HIGH Voltage Level
L = LOW Voltage Level
X = Don’t Care
FAST AND LS TTL DATA
4-16
微控制器 MCU
