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74HCT14BQ Schematic ( PDF Datasheet ) - NXP Semiconductors

Teilenummer 74HCT14BQ
Beschreibung Hex inverting Schmitt trigger
Hersteller NXP Semiconductors
Logo NXP Semiconductors Logo 




Gesamt 21 Seiten
74HCT14BQ Datasheet, Funktion
74HC14; 74HCT14
Hex inverting Schmitt trigger
Rev. 6 — 19 September 2012
Product data sheet
1. General description
The 74HC14; 74HCT14 is a high-speed Si-gate CMOS device and is pin compatible with
Low-power Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard
No. 7A.
The 74HC14; 74HCT14 provides six inverting buffers with Schmitt-trigger action. It is
capable of transforming slowly changing input signals into sharply defined, jitter-free
output signals.
2. Features and benefits
Low-power dissipation
ESD protection:
HBM JESD22-A114F exceeds 2000 V
MM JESD22-A115-A exceeds 200 V
Multiple package options
Specified from 40 C to +85 C and from 40 C to +125 C
3. Applications
Wave and pulse shapers
Astable multivibrators
Monostable multivibrators






74HCT14BQ Datasheet, Funktion
NXP Semiconductors
74HC14; 74HCT14
Hex inverting Schmitt trigger
11. Dynamic characteristics
Table 7. Dynamic characteristics
GND = 0 V; CL = 50 pF; for test circuit see Figure 7.
Symbol Parameter
Conditions
Tamb = 25 C
Min Typ Max
74HC14
tpd propagation delay nA to nY; see Figure 6
VCC = 2.0 V
VCC = 4.5 V
VCC = 5.0 V; CL = 15 pF
VCC = 6.0 V
tt
transition time
see Figure 6
VCC = 2.0 V
VCC = 4.5 V
VCC = 6.0 V
CPD power dissipation per package; VI = GND to VCC
capacitance
74HCT14
tpd propagation delay nA to nY; see Figure 6
VCC = 4.5 V
VCC = 5.0 V; CL = 15 pF
tt
transition time
VCC = 4.5 V; see Figure 6
CPD power dissipation per package;
capacitance
VI = GND to VCC 1.5 V
[1]
[2]
[3]
[1]
[2]
[3]
[1] tpd is the same as tPHL and tPLH.
[2] tt is the same as tTHL and tTLH.
[3] CPD is used to determine the dynamic power dissipation (PD in W):
PD = CPD VCC2 fi N + (CL VCC2 fo) where:
fi = input frequency in MHz;
fo = output frequency in MHz;
CL = output load capacitance in pF;
VCC = supply voltage in V;
N = number of inputs switching;
(CL VCC2 fo) = sum of outputs.
-
-
-
-
-
-
-
-
-
-
-
-
41 125
15 25
12 -
12 21
19 75
7 15
6 13
7-
20 34
17 -
7 15
8-
Tamb = 40 C to Unit
+125 C
Max Max
(85 C) (125 C)
155 190 ns
31 38 ns
- - ns
26 32 ns
95 110 ns
19 22 ns
15 19 ns
- - pF
43 51 ns
- - ns
19 22 ns
- - pF
74HC_HCT14
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 19 September 2012
© NXP B.V. 2012. All rights reserved.
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6 Page









74HCT14BQ pdf, datenblatt
NXP Semiconductors
74HC14; 74HCT14
Hex inverting Schmitt trigger
R
C
For 74HC14 and 74HCT14:
f
=
-1-
T
K--------1---R----C--
For K-factor see Figure 15
Fig 14. Relaxation oscillator
mna035

.

DDD




9&& 9
K-factor for 74HC14
Fig 15. Typical K-factor for relaxation oscillator

.








K-factor for 74HCT14
DDD

9&& 9
74HC_HCT14
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 6 — 19 September 2012
© NXP B.V. 2012. All rights reserved.
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