Datasheet
SN74AHC14
SN54AHC14
www.ti.com
SCLS238K –OCTOBER 1995–REVISED JUNE 2013
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted)
T
A
= –40°C to
T
A
= –55°C to T
A
= –40°C to
125°C
125°C 85°C
T
A
= 25°C
Recommended
PARAMETER TEST CONDITIONS VCC UNIT
SN54AHC14 SN74AHC14 SN74AHC14
MIN TYP MAX MIN MAX MIN MAX MIN MAX
3 V 1.2 2.2 1.2 2.2 1.2 2.2 1.2 2.2
V
T+
Positive-going
4.5 V 1.75 3.15 1.75 3.15 1.75 3.15 1.75 3.15 V
input threshold
voltage
5.5 V 2.15 3.85 2.15 3.85 2.15 3.85 2.15 3.85
3 V 0.9 1.9 0.9 1.9 0.9 1.9 0.9 1.9
V
T–
Negative-going
4.5 V 1.35 2.75 1.35 2.75 1.35 2.75 1.35 2.75 V
input threshold
voltage
5.5 V 1.65 3.35 1.65 3.35 1.65 3.35 1.65 3.35
3 V 0.3 1.2 0.3 1.2 0.3 1.2 0.3 1.2
ΔV
T
Hysteresis 4.5 V 0.4 1.4 0.4 1.4 0.4 1.4 0.4 1.4 V
(V
T+
– V
T–
)
5.5 V 0.5 1.6 0.5 1.6 0.5 1.6 0.5 1.6
2 V 1.9 2 1.9 1.9 1.9
I
OH
= –50 µA 3 V 2.9 3 2.9 2.9 2.9
V
OH
4.5 V 4.4 4.5 4.4 4.4 4.4 V
I
OH
= –4 mA 3 V 2.58 2.48 2.48 2.48
I
OL
= –8 mA 4.5 V 3.94 3.8 3.8 3.8
2 V 0.1 0.1 0.1 0.1
I
OH
= 50 µA 3 V 0.1 0.1 0.1 0.1
V
OL
4.5 V 0.1 0.1 0.1 0.1 V
I
OH
= 4 mA 3 V 0.36 0.5 0.44 0.5
I
OL
= 8 mA 4.5 V 0.36 0.5 0.44 0.5
0 V to
I
I
V
I
= 5.5 V or GND ±0.1 ±1
(1)
±1 ±1 µA
5.5 V
I
CC
V
I
= V
CC
or GND, IO = 0 5.5 V 1 20 20 20 µA
C
i
V
I
= V
CC
or GND 5 V 2 10 10 pF
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
SWITCHING CHARACTERISTICS
over recommended operating free-air temperature range, V
CC
= 3.3 V ± 0.3 V (unless otherwise noted) (see Figure 1)
T
A
= –40°C to
T
A
= –55°C to
125°C
T
A
= –40°C to 85°C
125°C
T
A
= 25°C
FROM TO OUTPUT
Recommended
PARAMETER UNIT
(INPUT) (OUTPUT) CAPACITANCE
SN54AHC14 SN74AHC14 SN74AHC14
TYP MAX MIN MAX MIN MAX MIN MAX
t
PLH
8.3
(1)
12.8
(1)
1
(1)
15
(1)
1 15 1 16
A Y C
L
= 15 pF ns
t
PHL
8.3
(1)
12.8
(1)
1
(1)
15
(1)
1 15 1 16
t
PLH
10.8 16.3 1 18.5 1 18.5 1 19.5
A Y C
L
= 50 pF ns
t
PHL
10.8 16.3 1 18.5 1 18.5 1 19.5
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested.
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