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74HC14N Datasheet(PDF) 7 Page - NXP Semiconductors

Part No. 74HC14N
Description  Hex inverting Schmitt trigger
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

74HC14N Datasheet(HTML) 7 Page - NXP Semiconductors

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74HC_HCT14
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2012. All rights reserved.
Product data sheet
Rev. 6 — 19 September 2012
7 of 21
NXP Semiconductors
74HC14; 74HCT14
Hex inverting Schmitt trigger
12. Waveforms
Measurement points are given in Table 8.
VOL and VOH are typical voltage output levels that occur with the output load.
Fig 6.
Input to output propagation delays
mna722
tPLH
tPHL
VM
VM
90 %
10 %
VM
VM
nY output
nA input
VI
GND
VOH
VOL
tTLH
tTHL
Table 8.
Measurement points
Type
Input
Output
VM
VM
VX
VY
74HC14
0.5VCC
0.5VCC
0.1VCC
0.9VCC
74HCT14
1.3 V
1.3 V
0.1VCC
0.9VCC
Test data is given in Table 9.
Definitions test circuit:
RT = termination resistance should be equal to output impedance Zo of the pulse generator.
CL = load capacitance including jig and probe capacitance.
Fig 7.
Load circuitry for measuring switching times
001aah768
tW
tW
tr
tr
tf
VM
VI
negative
pulse
GND
VI
positive
pulse
GND
10 %
90 %
90 %
10 %
VM
VM
VM
tf
VCC
DUT
RT
VI
VO
CL
G


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