Datasheet

SN54AHCT14, SN74AHCT14
HEX SCHMITT-TRIGGER INVERTERS
SCLS246P − OCTOBER 1995 − REVISED JULY 2003
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 SN54AHCT14 SN74AHCT14
UNIT
PARAMETER TEST CONDITIONS V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
V
T+
Positive going input
4.5 V 0.9 1.9 0.9 1.9 0.9 1.9
V
Positive-going input
threshold voltage
5.5 V 1 2.1 1 2.1 1 2.1
V
V
T−
Negative going input
4.5 V 0.5 1.5 0.5 1.5 0.5 1.5
V
Negative-going input
threshold voltage
5.5 V 0.6 1.7 0.6 1.7 0.6 1.7
V
ΔV
T
Hysteresis
4.5 V 0.4 1.4 0.4 1.4 0.4 1.4
V
Hysteresis
(V
T+
− V
T−
)
5.5 V 0.4 1.5 0.4 1.5 0.4 1.5
V
V
I
OH
= −50 mA 4.5 V 4.4 4.5 4.4 4.4
V
V
OH
I
OH
= −8 mA 4.5 V 3.94 3.8 3.8
V
V
I
OL
= 50 mA 4.5 V 0.1 0.1 0.1
V
V
OL
I
OL
= 8 mA 4.5 V 0.36 0.44 0.44
V
I
I
V
I
= 5.5 V or GND 0 V to 5.5 V ±0.1 ±1* ±1 mA
I
CC
V
I
= V
CC
or GND, I
O
= 0 5.5 V 2 20 20 mA
ΔI
CC
†
One input at 3.4 V,
Other inputs at V
CC
or GND
5.5 V 1.35 1.5 1.5 mA
C
i
V
I
= V
CC
or GND 5 V 2 10 10 pF
* On products compliant to MIL-PRF-38535, this parameter is not production tested at V
CC
= 0 V.
†
This is the increase in supply current for each input at one of the specified TTL voltage levels, rather than 0 V or V
CC
.
switching characteristics over recommended operating free-air temperature range
V
CC
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
PARAMETER
FROM TO LOAD
T
A
= 25°C SN54AHCT14 SN74AHCT14
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
LOAD
CAPACITANCE
MIN TYP MAX MIN MAX MIN MAX
UNIT
t
PLH
A
Y
C 15 pF
4** 7** 1** 8** 1 8
ns
t
PHL
A Y C
L
= 15 pF
4** 7** 1** 8** 1 8
ns
t
PLH
A
Y
C =50pF
5.5 8 1 9 1 9
ns
t
PHL
A Y C
L
= 50 pF
5.5 8 1 9 1 9
ns
** On products compliant to MIL-PRF-38535, this parameter is not production tested.
noise characteristics, V
CC
= 5 V, C
L
= 50 pF, T
A
= 25°C (see Note 5)
PARAMETER
SN74AHCT14
UNIT
PARAMETER
MIN TYP MAX
UNIT
V
OL(P)
Quiet output, maximum dynamic V
OL
0.9 V
V
OL(V)
Quiet output, minimum dynamic V
OL
−0.7 V
V
OH(V)
Quiet output, minimum dynamic V
OH
4.3 V
V
IH(D)
High-level dynamic input voltage 2.1 V
V
IL(D)
Low-level dynamic input voltage 0.5 V
NOTE 5: Characteristics are for surface-mount packages only.
operating characteristics, V
CC
= 5 V, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance No load, f = 1 MHz 12 pF