74HC_HCT14

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© NXP B.V. 2012. All rights reserved.

Product data sheet

Rev. 6 — 19 September 2012

8 of 21

NXP Semiconductors

74HC14; 74HCT14

Hex inverting Schmitt trigger

13. Transfer characteristics

14. Transfer characteristics waveforms

Table 9.

Test data

Type

Input

Load

Test

74HC14

6.0 ns

15 pF, 50 pF

74HCT14

3.0 V

6.0 ns

15 pF, 50 pF

Table 10.

Transfer characteristics

At recommended operating conditions; voltages are referenced to GND (ground = 0 V); see Figure 8 and Figure 9.

Symbol Parameter

Conditions

to +85

C

to +125

C

Unit

Min

Typ

Max

Min

Max

Min

Max

74HC14

positive-going

threshold

voltage

0.7

1.18

1.5

0.7

1.5

0.7

1.5

V

1.7

2.38

3.15

1.7

3.15

1.7

3.15

V

2.1

3.14

4.2

2.1

4.2

2.1

4.2

V

negative-going

threshold

voltage

0.3

0.52

0.9

0.3

0.9

0.3

0.9

V

0.9

1.4

2.0

0.9

2.0

0.9

2.0

V

1.2

1.89

2.6

1.2

2.6

1.2

2.6

V

hysteresis

voltage

0.2

0.66

1.0

0.2

1.0

0.2

1.0

V

0.4

0.98

1.4

0.4

1.4

0.4

1.4

V

0.6

1.25

1.6

0.6

1.6

0.6

1.6

V

74HCT14

positive-going

threshold

voltage

1.2

1.41

1.9

1.2

1.9

1.2

1.9

V

1.4

1.59

2.1

1.4

2.1

1.4

2.1

V

negative-going

threshold

voltage

0.5

0.85

1.2

0.5

1.2

0.5

1.2

V

0.6

0.99

1.4

0.6

1.4

0.6

1.4

V

hysteresis

voltage

0.4

0.56

-

0.4

-

0.4

-

V

0.4

0.6

-

0.4

-

0.4

-

V

Fig 8.

Transfer characteristics

Fig 9.

Transfer characteristics definitions

mna207

mna208