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74HC14 Datasheet(PDF) 5 Page - NXP Semiconductors

Part No. 74HC14
Description  Hex inverting Schmitt trigger
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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 5 page
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September 1993
5
Philips Semiconductors
Product specification
Hex inverting Schmitt trigger
74HC/HCT14
DC CHARACTERISTICS FOR 74HCT
For the DC characteristics see
“74HC/HCT/HCU/HCMOS Logic Family Specifications”. Transfer characteristics are
given below.
Output capability: standard
ICC category: SSI
Note to HCT types
The value of additional quiescent supply current (
∆ICC) for a unit load of 1 is given in the family specifications.
To determine
∆ICC per input, multiply this value by the unit load coefficient shown in the table below.
Transfer characteristics for 74HCT
Voltages are referenced to GND (ground = 0 V)
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr = tf = 6 ns; CL = 50 pF
INPUT
UNIT LOAD COEFFICIENT
nA
0.3
SYMBOL
PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HCT
VCC
(V)
WAVEFORMS
+25
−40 to +85
−40 to +125
min.
typ.
max.
min.
max.
min.
max.
VT+
positive-going
threshold
1.2
1.4
1.41
1.59
1.9
2.1
1.2
1.4
1.9
2.1
1.2
1.4
1.9
2.1
V
4.5
5.5
Figs 6 and 7
VT
negative-going
threshold
0.5
0.6
0.85
0.99
1.2
1.4
0.5
0.6
1.2
1.4
0.5
0.6
1.2
1.4
V
4.5
5.5
Figs 6 and 7
VH
hysteresis
(VT+ −VT−)
0.4
0.4
0.56
0.60
0.4
0.4
0.4
0.4
V
4.5
5.5
Figs 6 and 7
SYMBOL
PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HCT
VCC
(V)
WAVEFORMS
+25
−40 to +85
−40 to +125
min.
typ.
max.
min.
max.
min.
max.
tPHL/ tPLH
propagation delay
nA, to nY
20
34
43
51
ns
4.5
Fig.8
tTHL/ tTLH
output transition
time
7
15
19
22
ns
4.5
Fig.8




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