Philips Semiconductors
Product specification
Hex inverting Schmitt trigger
FEATURES
•
Applications:
– Wave and pulse shapers
– Astable multivibrators
– Monostable multivibrators.
•
Complies with JEDEC standard no. 7A
•
ESD protection:
HBM EIA/JESD22-A114-A exceeds 2000 V
MM EIA/JESD22-A115-A exceeds 200 V.
•
Specified from
−40
to +85
°C
and
−40
to +125
°C.
QUICK REFERENCE DATA
GND = 0 V; T
amb
= 25
°C;
t
r
= t
f
= 6 ns
DESCRIPTION
74HC14; 74HCT14
The 74HC14 and 74HCT14 are high-speed Si-gate CMOS
devices and are pin compatible with low power Schottky
TTL (LSTTL). They are specified in compliance with
JEDEC standard no. 7A.
The 74HC14 and 74HCT14 provide six inverting buffers
with Schmitt-trigger action. They are capable of
transforming slowly changing input signals into sharply
defined, jitter-free output signals.
TYPICAL
SYMBOL
t
PHL
/t
PLH
C
I
C
PD
Notes
1. C
PD
is used to determine the dynamic power dissipation (P
D
in
µW):
P
D
= C
PD
×
V
CC2
×
f
i
×
N +
Σ(C
L
×
V
CC2
×
f
o
) where:
f
i
= input frequency in MHz;
f
o
= output frequency in MHz;
C
L
= output load capacitance in pF;
V
CC
= supply voltage in Volts;
N = total load switching outputs;
Σ(C
L
×
V
CC2
×
f
o
) = sum of the outputs.
2. For type 74HC14 the condition is V
I
= GND to V
CC
.
For type 74HCT14 the condition is V
I
= GND to V
CC
−
1.5 V.
PARAMETER
propagation delay nA to nY
input capacitance
power dissipation capacitance per gate notes 1 and 2
CONDITIONS
HC
C
L
= 15 pF; V
CC
= 5 V 12
3.5
7
17
3.5
8
HCT
ns
pF
pF
UNIT
2003 Oct 30
2
Philips Semiconductors
Product specification
Hex inverting Schmitt trigger
74HC14; 74HCT14
handbook, halfpage
handbook, halfpage
1A
1
VCC
14
13
12
6A
6Y
5A
5Y
4A
1A
1Y
2A
2Y
3A
3Y
GND
1
2
3
4
5
6
7
MNA839
14 VCC
13 6A
12 6Y
1Y
2A
2Y
2
3
4
5
6
14
11 5A
10 5Y
9
4A
3A
3Y
GND
(1)
11
10
9
8 4Y
7
Top view
GND
8
4Y
MBL760
(1) The die substrate is attached to this pad using conductive die
attach material. It can not be used as a supply pin or input.
Fig.1 Pin configuration.
Fig.2 Pin configuration DHVQFN14.
handbook, halfpage
handbook, halfpage
1
2
1
1A
1Y
2
3
4
5
6
4
3
2A
2Y
5
3A
3Y
6
9
4A
4Y
8
9
8
11
5A
5Y
10
11
10
13
6A
6Y
12
13
12
MNA841
MNA840
Fig.3 Logic symbol.
Fig.4 IEC logic symbol.
2003 Oct 30
4
Philips Semiconductors
Product specification
Hex inverting Schmitt trigger
74HC14; 74HCT14
handbook, halfpage
1
1A
1Y
2
3
2A
2Y
4
5
3A
3Y
6
handbook, halfpage
9
4A
4Y
A
Y
MNA843
8
11
5A
5Y
10
13
6A
6Y
12
MNA842
Fig.5 Functional diagram.
Fig.6 Logic diagram (one Schmitt trigger).
2003 Oct 30
5
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