Datasheet

SN54HCT14, SN74HCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS225F − JULY 1995 − REVISED OCTOBER 2010
3
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
T
A
= 25°C SN54HCT14 SN74HCT14
UNIT
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
V
T+
Positive going
4.5 V 1.2 1.5 1.9 1.2 1.9 1.2 1.9
V
Positive-going
threshold
5.5 V 1.4 1.7 2.1 1.4 2.1 1.4 2.1
V
V
T−
Negative going
4.5 V 0.5 0.9 1.2 0.5 1.2 0.5 1.2
V
Negative-going
threshold
5.5 V 0.6 1 1.4 0.6 1.4 0.6 1.4
V
ΔV
T
Hysteresis
4.5 V 0.4 0.6 1.4 0.4 1.4 0.4 1.4
V
Hysteresis
(V
T+
− V
T−
)
5.5 V 0.4 0.65 1.5 0.4 1.5 0.4 1.5
V
V
I
OH
= −20 μA 4.5 V 4.4 4.49 4.4 4.4
V
V
OH
I
OH
= −4 mA 4.5 V 3.98 4.3 3.7 3.84
V
V
I
OL
= 20 μA 4.5 V 0.001 0.1 0.1 0.1
V
V
OL
I
OL
= 4 mA 4.5 V 0.17 0.26 0.4 0.33
V
I
I
V
I
= V
CC
or GND 5.5 V ±0.1 ±1 ±1 μA
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.5 V 2 40 20 μA
ΔI
CC
†
One input at 0.5 V or 2.4 V,
Other inputs at GND or V
CC
5.5 V 0.2 2.4 3 2.9 mA
C
i
VI = V
CC
or GND 5 V 3 10 10 10 pF
†
This is the increase in supply current for each input that is at one of the specified TTL voltage levels, rather than 0 V or V
CC
.
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO
V
T
A
= 25°C SN54HCT14 SN74HCT14
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
A
Y
4.5 V 20 32 48 40
ns
t
pd
A Y
5.5 V 18 30 45 38
ns
t
Y
4.5 V 7 15 22 19
ns
t
t
Y
5.5 V 6 14 20 17
ns
operating characteristics, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance No load 10 pF