TECHNICAL DATA
55
Hex Schmitt-Trigger Inverter
High-Perform ance Silicon-Gate C MOS
The IN74HC1 4A 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
IN7 4HC14A 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
IN74HC14A
ORDERING INFORMATION
IN74HC14AN Plastic
IN74HC14AD SOIC
TA = -55° to 125° C for all packages
LOGIC DIAGRAM
PIN 14 =VCC
PIN 7 = GND
PIN ASSIGNMENT
FUNCTION TABLE
Inputs Output
AY
LH
HL
IN74HC14A
56
MAXIMUM RATINGS*
Symbol Parameter Value Unit
VCC DC Supply Voltage (Referenced to GND) -0.5 to +7.0 V
VIN DC Input Voltage (Referenced to GND) -1.5 to VCC +1.5 V
VOUT DC Output Voltage (Referenced to GND) -0.5 to VCC +0.5 V
IIN DC Input Current, per Pin ±20 mA
IOUT DC Output Current, per Pin ±25 mA
ICC DC Supply Current, VCC and GND Pins ±50 mA
PDPower Dissipation in Still Air, Plastic DIP+
SOIC Package+ 750
500 mW
Tstg Storage Temperature -65 to +150 °C
TLLead Temperature, 1 mm from Case for 10 Seconds
(Plastic DIP or SOIC Package) 260 °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 Parameter Min Max Unit
VCC DC Supply Voltage (Referenced to GND) 2.0 6.0 V
VIN, VOUT DC Input Voltage, Output Voltage (Referenced to GND) 0 VCC V
TAOperating Temperature, All Package Types -55 +125 °C
tr , tfInput Rise and Fall Time (Figure 1) - No
Limit* ns
* W hen VIN ≈50% VCC , ICC > 1mA
Thi s device contains p rote ction c ircuitr y to guard a gainst damage due to hi gh static voltage s or electr ic
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, VIN and VOUT should be constrained to the range
GND≤(VIN or VOUT)≤VCC.
Unused inputs must always be tied to an appropriate logic voltage level (e.g., either GND or VCC).
Unused outputs must be left open.
IN74HC14A
57
DC ELECTRICAL CHARACTERISTICS(Voltages Referenced to GND)
VCC Guaranteed Limit
Symbol Parameter Test Conditions V 25 °C
to
-55°C
≤85
°C≤125
°CUnit
VT+max Maximum Positive-
Going Input Threshold
Voltage
VOUT=0.1 V
IOUT ≤ 20 µA2.0
4.5
6.0
1.5
3.15
4.2
1.5
3.15
4.2
1.5
3.15
4.2
V
VT+min Minimum Positive-
Going Input Threshold
Voltage
VOUT=0.1 V
IOUT ≤ 20 µA2.0
4.5
6.0
1.0
2.3
3.0
0.95
2.25
2.95
0.95
2.25
2.95
V
VT-max Maximum Negative-
Going Input Threshold
Voltage
VOUT=VCC -0.1 V
IOUT≤ 20 µA2.0
4.5
6.0
0.9
2.0
2.6
0.95
2.05
2.65
0.95
2.05
2.65
V
VT-min Minimum Negative-
Going Input Threshold
Voltage
VOUT=VCC-0.1 V
IOUT≤ 20 µA2.0
4.5
6.0
0.3
0.9
1.2
0.3
0.9
1.2
0.3
0.9
1.2
V
VHmax
Note 1 Maximum Hysteresis
Voltage VOUT=0.1 V or VCC-0.1 V
IOUT≤ 20 µA2.0
4.5
6.0
1.2
2.25
3.0
1.2
2.25
3.0
1.2
2.25
3.0
V
VHmin
Note 1 Minimum Hyst eresis
Voltage VOUT=0.1 V or VCC-0.1 V
IOUT≤ 20 µA2.0
4.5
6.5
0.2
0.4
0.5
0.2
0.4
0.5
0.2
0.4
0.5
V
VOH Minimum High-Level
Output Voltage VIN≤VT -min
IOUT ≤ 20 µA2.0
4.5
6.0
1.9
4.4
5.9
1.9
4.4
5.9
1.9
4.4
5.9
V
VIN≤VT -min
IOUT≤4mA
IOUT≤5.2mA 4.5
6.0 3.98
5.48 3.84
5.34 3.7
5.2
VOL Maximum Low-Level
Output Voltage VIN≥VT +max
IOUT ≤ 20 µA2.0
4.5
6.0
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
0.1
V
VIN≥VT +max
IOUT≤ 4mA
IOUT≤5.2mA 4.5
6.0 0.26
0.26 0.33
0.33 0.4
0.4
IIN Maximum Input
Leakage Current VIN=VCC or GND 6.0 ±0.1 ±1.0 ±1.0 µA
ICC Maximum Qui esce nt
Supply Current
(per Package)
VIN=VCC or GND
IOUT=0µA6.0 1.0 10 40 µA
Note: 1 VHmin>(VT+min)-(VT-max); VHmax=(VT+max)-(VT-min) .
IN74HC14A
58
AC ELECTRICAL CHARACTERISTICS(CL=50pF,Input tr=tf=6.0 ns)
VCC Guaranteed Limit
Symbol Parameter V 25 °C
to
-55°C
≤85°C≤125°CUnit
tPLH, tPHL Maximum Propagation Delay, Input A to
Output Y (Figures 1 and 2) 2.0
4.5
6.0
95
19
16
120
24
20
145
29
25
ns
tTLH, tTHL Maximum Output Transition Time, Any Output
(Figures 1 and 2) 2.0
4.5
6.0
75
15
13
95
19
16
110
22
19
ns
CIN Maximum Input Capacitance - 10 10 10 pF
Power Dissipation Capacitance (Per Inverter) Typical @25°C,VCC=5.0 V
CPD Used to determine the no-load dynamic power
consumption:
PD=CPDVCC2f+ICCVCC
22 pF
Figure 1. Switching Waveforms Figure 2. Test Circuit