TECHNICAL DATA
IN74HC14A
Hex Schmitt-Trigger Inverter
High-Performance Silicon-Gate CMOS
The IN74HC14A is identical in pinout to the LS/ALS14, LS/ALS04.
The device inputs are compatible with standard CMOS outputs; with
pullup resistors, they are compatible with LS/ALSTTL outputs.
The IN74HC14A is useful to “square up” slow input rise and fall
times. Due to the hysteresis voltage of the Schmitt trigger, the
IN74HC14A finds applications in noisy environments.
•
•
•
•
Outputs Directly Interface to CMOS, NMOS, and TTL
Operating Voltage Range: 2.0 to 6.0 V
Low Input Current: 1.0
µA
High Noise Immunity Characteristic of CMOS Devices
ORDERING INFORMATION
IN74HC14AN Plastic
IN74HC14AD SOIC
T
A
= -55° to 125° C for all packages
LOGIC DIAGRAM
PIN ASSIGNMENT
FUNCTION TABLE
Inputs
A
L
H
PIN 14 =V
CC
PIN 7 = GND
Output
Y
H
L
55
IN74HC14A
MAXIMUM RATINGS
*
Symbol
V
CC
V
IN
V
OUT
I
IN
I
OUT
I
CC
P
D
Tstg
T
L
*
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage (Referenced to GND)
DC Output Voltage (Referenced to GND)
DC Input Current, per Pin
DC Output Current, per Pin
DC Supply Current, V
CC
and GND Pins
Power Dissipation in Still Air, Plastic DIP+
SOIC Package+
Storage Temperature
Lead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package)
Value
-0.5 to +7.0
-1.5 to V
CC
+1.5
-0.5 to V
CC
+0.5
±20
±25
±50
750
500
-65 to +150
260
Unit
V
V
V
mA
mA
mA
mW
°C
°C
Maximum Ratings are those values beyond which damage to the device may occur.
Functional operation should be restricted to the Recommended Operating Conditions.
+Derating - Plastic DIP: - 10 mW/°C from 65° to 125°C
SOIC Package: : - 7 mW/°C from 65° to 125°C
RECOMMENDED OPERATING CONDITIONS
Symbol
V
CC
V
IN
, V
OUT
T
A
t
r
, t
f
Parameter
DC Supply Voltage (Referenced to GND)
DC Input Voltage, Output Voltage (Referenced to GND)
Operating Temperature, All Package Types
Input Rise and Fall Time
(Figure 1)
Min
2.0
0
-55
-
Max
6.0
V
CC
+125
No
Limit*
Unit
V
V
°C
ns
* When V
IN
≈50%
V
CC
, I
CC
> 1mA
This device contains protection circuitry to guard against damage due to high static voltages or electric
fields. However, precautions must be taken to avoid applications of any voltage higher than maximum rated
voltages to this high-impedance circuit. For proper operation, V
IN
and V
OUT
should be constrained to the range
GND≤(V
IN
or V
OUT
)≤V
CC
.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or V
CC
).
Unused outputs must be left open.
56
IN74HC14A
AC ELECTRICAL CHARACTERISTICS
(C
L
=50pF,Input t
r
=t
f
=6.0 ns)
V
CC
Symbol
Parameter
V
Guaranteed Limit
25
°C
to
-55°C
95
19
16
75
15
13
10
≤85°C
≤125°C
Unit
t
PLH
, t
PHL
Maximum Propagation Delay, Input A to
Output Y (Figures 1 and 2)
Maximum Output Transition Time, Any Output
(Figures 1 and 2)
Maximum Input Capacitance
2.0
4.5
6.0
2.0
4.5
6.0
-
120
24
20
95
19
16
10
145
29
25
110
22
19
10
ns
t
TLH
, t
THL
ns
C
IN
pF
Power Dissipation Capacitance (Per Inverter)
C
PD
Used to determine the no-load dynamic power
consumption:
P
D
=C
PD
V
CC2
f+I
CC
V
CC
Typical @25°C,V
CC
=5.0 V
22
pF
Figure 1. Switching Waveforms
Figure 2. Test Circuit
58
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