Datasheet

TYPES SN74LS14, SN54LS14
HEX SCHMITT-TRIGGER INVERTERS
TYPICAL CHARACTERISTICS OF ‘LS14 CIRCUITS
POSITIVE-GOING THRESHOLD VOLTAGE
FREE-AIR TkPERATURE
1.70
>
, 1.69
3 1.68
0
2 1.67
z 1.66
r’
L-
F
1.65
‘0
9, 1.64
z
:E 1.63
2
1.62 - ,
t 1.61
1.60
Y _1c .mn .-
760
T A -
Frae-AW Temperature - ‘C
TA - Free-Air Temparaturs - ‘C
FIGURE 8
FIGURE 9
HYSTERESIS
VS
rnrr
r
50 - LS 0 15 5” 15 Iuu ILS
TA - Free-Au Temperature - ‘C
c
720 740 760 780
vT+ - VT-
800 820 840 860 880
- Hysteresis - mV
FIGURE 10
FIGURE 11
Data for temperatures bdow 0°C and aboue 7o”c and SUPPI” vo,rages
4.75 ” and above 5.25 V arc apphcable for SN54LS14 only.
NEGATIVE-GOING THRESHOLD VOLTAGE
FREE-AIR TGPERATURE
0.90
>
1 0.89
%
c 0.88
s
-0 0.87
0
E 0.86
f
c
m 0.85
.c
u 0.84
0
.z 5 0.83
7 0.82
’
z
0.81
0.80
1 1 , (
_..
1 VCC’5V
t i i i i
-75 -50 -25 0
25 50 75
100 125
DISTRIBUTION OF UNITS
FOR HYSTERESIS
4?
j TEXAS
INSTRUMENTS
3-73