74HC_HCT14

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© 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.

Fig 6.

Input to output propagation delays

mna722

90 %

10 %

nY output

nA input

GND

Table 8.

Measurement points

Type

Input

Output

74HC14

74HCT14

1.3 V

1.3 V

Test data is given in Table 9.

Definitions test circuit:

Fig 7.

Load circuitry for measuring switching times

001aah768

negative

pulse

GND

positive

pulse

GND

10 %

90 %

90 %

10 %

DUT

RT

VI

VO

CL

G