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HD74AC14
Hex Inverter Schmitt Trigger
Description
The HD74AC14 contains six logic inverters which accept standard CMOS input signals (TTL levels for
HD74ACT14) 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 HD74AC14 has hysteresis between the positive-going and negative-going input thresholds (typically
1.0 V) which is determined internally by transistor ratios and is essentially insensitive to temperature and
supply voltage variations.
Feature
• Outputs Source/Sink 24 mA
Pin Arrangement
1
2
3
4
5
6
7
(Top view)
14
13
12
11
10
V
CC
9
8GND
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HD74AC14
Function Table
Input Output
AO
LH
HL
DC Characteristics (unless otherwise specified)
Item Symbol VCC (V) HD74AC14 HD74ACT14 Unit Condition
Maximum quiescent supply
I
CC
current
Maximum quiescent supply
I
CC
current
Maximum positive threshold Vt
+
3.0 2.2 2.0 V Ta = Worst case
4.5 3.2
5.5 3.9
Minimum negative threshold Vt
–
3.0 0.5 0.8 V Ta = Worst case
4.5 0.9
5.5 1.1
Maximum hysteresis Vh (max) 3.0 1.2 1.2 V Ta = Worst case
4.5 1.4
5.5 1.6
Minimum hysteresis Vh (min) 3.0 0.3 0.4 V Ta = Worst case
4.5 0.4
5.5 0.5
40 40 µAVIN = VCC or ground,
V
= 5.5 V,
CC
Ta = Wordt case
4.0 4.0 µAVIN = VCC or ground,
V
= 5.5 V,
CC
Ta = 25°C
2
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AC Characteristics
HD74AC14
Item Symbol V
Propagation delay t
PLH
Ta = +25°C
C
= 50 pF
L
(V)*1Min Typ Max Min Max Unit
CC
3.3 1.0 9.5 13.5 1.0 15.0 ns
Ta = –40°C to +85°C
CL = 50 pF
5.0 1.0 7.0 10.0 1.0 11.0
Propagation delay t
PHL
3.3 1.0 7.5 11.5 1.0 13.0 ns
5.0 1.0 6.0 8.5 1.0 9.5
Note: 1. Voltage Range 3.3 is 3.3 V ± 0.3 V
Voltage Range 5.0 is 5.0 V ± 0.5 V
Capacitance
Item Symbol Typ Unit Condition
Input capacitance C
Power dissipation capacitance C
IN
PD
4.5 pF VCC = 5.5 V
25.0 pF VCC = 5.0 V
3
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1
19.20
20.32 Max
1.30
Unit: mm
814
6.30
7.40 Max
7
2.54 ± 0.25
2.39 Max
0.48 ± 0.10
2.54 Min 5.06 Max
0.51 Min
Hitachi Code
JEDEC
EIAJ
Weight
7.62
+ 0.10
0.25
– 0.05
0° – 15°
(reference value)
DP-14
Conforms
Conforms
0.97 g
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14
1.27
10.5 Max
1
10.06
1.42 Max
Unit: mm
8
5.5
7
+ 0.20
7.80
– 0.30
2.20 Max
*0.22 ± 0.05
1.15
0.20 ± 0.04
0° – 8°
0.70 ± 0.20
*0.42 ± 0.08
0.40 ± 0.06
*Dimension including the plating thickness
Base material dimension
0.12
0.10 ± 0.10
0.15
M
Hitachi Code
JEDEC
EIAJ
(reference value)
Weight
FP-14DA
—
Conforms
0.23 g
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9.05 Max
14
Unit: mm
8.65
8
*Pd plating
1
0.635 Max
1.27
*0.40 ± 0.06
7
+ 0.11
0.25
3.95
– 0.04
0.14
0.15
1.75 Max
M
6.10
1.08
*0.20 ± 0.05
0.60
Hitachi Code
JEDEC
EIAJ
Weight
+ 0.10
– 0.30
0° – 8°
+ 0.67
– 0.20
(reference value)
FP-14DN
Conforms
Conforms
0.13 g
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5.30 Max
14 8
17
+0.08
*0.22
–0.07
0.20 ± 0.06
5.00
0.83 Max
0.65
0.13
Unit: mm
4.40
1.0
M
6.40 ± 0.20
0.10
1.10 Max
*Dimension including the plating thickness
Base material dimension
0.15 ± 0.04
*0.17 ± 0.05
+0.03
–0.04
0.07
0° – 8°
Hitachi Code
JEDEC
EIAJ
(reference value)
Weight
0.50 ± 0.10
TTP-14D
—
—
0.05 g
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Cautions
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copyright, trademark, or other intellectual property rights for information contained in this document.
Hitachi bears no responsibility for problems that may arise with third party’s rights, including
intellectual property rights, in connection with use of the information contained in this document.
2. Products and product specifications may be subject to change without notice. Confirm that you have
received the latest product standards or specifications before final design, purchase or use.
3. Hitachi makes every attempt to ensure that its products are of high quality and reliability. However,
contact Hitachi’s sales office before using the product in an application that demands especially high
quality and reliability or where its failure or malfunction may directly threaten human life or cause risk
of bodily injury, such as aerospace, aeronautics, nuclear power, combustion control, transportation,
traffic, safety equipment or medical equipment for life support.
4. Design your application so that the product is used within the ranges guaranteed by Hitachi particularly
for maximum rating, operating supply voltage range, heat radiation characteristics, installation
conditions and other characteristics. Hitachi bears no responsibility for failure or damage when used
beyond the guaranteed ranges. Even within the guaranteed ranges, consider normally foreseeable
failure rates or failure modes in semiconductor devices and employ systemic measures such as failsafes, so that the equipment incorporating Hitachi product does not cause bodily injury, fire or other
consequential damage due to operation of the Hitachi product.
5. This product is not designed to be radiation resistant.
6. No one is permitted to reproduce or duplicate, in any form, the whole or part of this document without
written approval from Hitachi.
7. Contact Hitachi’s sales office for any questions regarding this document or Hitachi semiconductor
products.
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