Philips Semiconductors

Product specification

Hex inverting Schmitt trigger

74HC14; 74HCT14

0

1

2

3

4

5

6

VI

VM

VM

nA input

GND

tPHL

tPLH

VOH

90%

nY output

VM

VM

VOL

10%

tTHL

tTLH

MNA722

2003 Oct 30

15

Philips Semiconductors

Product specification

Hex inverting Schmitt trigger

74HC14; 74HCT14

S1

VCC

VCC

open

RL =

GND

VI

VO

1 kΩ

PULSE

D.U.T.

GENERATOR

CL =

RT

50 pF

MNA742

2003 Oct 30

16

Philips Semiconductors

Product specification

Hex inverting Schmitt trigger

74HC14; 74HCT14

APPLICATION INFORMATION

The slow input rise and fall times cause additional power

400

MNA852

dissipation. This can be calculated using the following

handbook, halfpage

formula:

ICC(AV)

Pad = fi × (tr × ICC(AV) + tf × ICC(AV)) × VCC.

( A)

300

Where:

Pad = additional power dissipation (μW);

fi = input frequency (MHz);

200

positive - going

tr = input rise time (μs); 10% to 90%;

edge

tf = input fall time (μs); 10% to 90%;

ICC(AV) = average additional supply current (μA).

100

ICC(AV) differs with positive or negative input transitions, as

negative - going

shown in Figs 16 and 17.

edge

For 74HC/HCT14 used in a relaxation oscillator circuit,

0

2

4

6

0

VCC (V)

see Fig.18.

Note to application information

All values given are typical unless otherwise specified.

Linear change of VI between 0.1VCC to 0.9VCC

Fig.16

Average ICC for 74HC14 Schmitt trigger

devices.

2003 Oct 30

17

Philips Semiconductors

Product specification

Hex inverting Schmitt trigger

74HC14; 74HCT14

PACKAGE OUTLINES

SO14: plastic small outline package; 14 leads; body width 3.9 mm

SOT108-1

D

E

A

X

c

y

HE

v M A

Z

14

8

Q

A2

(A3)

A

A1

pin 1 index

θ

L p

1

7

L

e

w M

detail X

bp

0

2.5

5 mm

scale

DIMENSIONS (inch dimensions are derived from the original mm dimensions)

UNIT

A

A1

A2

A3

bp

c

D(1)

E(1)

e

HE

L

Lp

Q

v

w

y

Z (1)

θ

max.

mm

1.75

0.25

1.45

0.25

0.49

0.25

8.75

4.0

1.27

6.2

1.05

1.0

0.7

0.25

0.25

0.1

0.7

0.10

1.25

0.36

0.19

8.55

3.8

5.8

0.4

0.6

0.3

8

o

0o

inches

0.069

0.010

0.057

0.01

0.019

0.0100

0.35

0.16

0.05

0.244

0.041

0.039

0.028

0.01

0.01

0.004

0.028

0.004

0.049

0.014

0.0075

0.34

0.15

0.228

0.016

0.024

0.012

OUTLINE

REFERENCES

EUROPEAN

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

PROJECTION

SOT108-1

076E06

MS-012

99-12-27

03-02-19

2003 Oct 30

18

Philips Semiconductors

Product specification

Hex inverting Schmitt trigger

74HC14; 74HCT14

DIP14: plastic dual in-line package; 14 leads (300 mil)

SOT27-1

UNIT

A

A1

A 2

b

b

1

c

D

(1)

E

(1)

e

e

1

L

M

E

M

H

w

Z (1)

max.

min.

max.

max.

mm

4.2

0.51

3.2

1.73

0.53

0.36

19.50

6.48

2.54

7.62

3.60

8.25

10.0

0.254

2.2

1.13

0.38

0.23

18.55

6.20

3.05

7.80

8.3

inches

0.17

0.02

0.13

0.068

0.021

0.014

0.77

0.26

0.1

0.3

0.14

0.32

0.39

0.01

0.087

0.044

0.015

0.009

0.73

0.24

0.12

0.31

0.33

OUTLINE

REFERENCES

EUROPEAN

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

PROJECTION

SOT27-1

050G04

MO-001

SC-501-14

99-12-27

03-02-13

2003 Oct 30

19

Philips Semiconductors

Product specification

Hex inverting Schmitt trigger

74HC14; 74HCT14

TSSOP14: plastic thin shrink small outline package; 14 leads; body width 4.4 mm

SOT402-1

D

E

A

X

c

y

HE

v M A

Z

14

8

Q

A

2

(A3)

A

pin 1 index

A1

θ

Lp

L

1

7

w M

detail X

e

bp

0

2.5

5 mm

scale

DIMENSIONS (mm are the original dimensions)

UNIT

A

A1

A2

A3

bp

c

D (1)

E (2)

e

HE

L

Lp

Q

v

w

y

Z (1)

θ

max.

mm

1.1

0.15

0.95

0.25

0.30

0.2

5.1

4.5

0.65

6.6

1

0.75

0.4

0.2

0.13

0.1

0.72

8o

0.05

0.80

0.19

0.1

4.9

4.3

6.2

0.50

0.3

0.38

0o

OUTLINE

REFERENCES

EUROPEAN

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

PROJECTION

SOT402-1

MO-153

99-12-27

03-02-18

2003 Oct 30

20

Philips Semiconductors

Product specification

Hex inverting Schmitt trigger

74HC14; 74HCT14

DHVQFN14: plastic dual in-line compatible thermal enhanced very thin quad flat package; no leads;

SOT762-1

14 terminals; body 2.5 x 3 x 0.85 mm

A

E

A1

c

terminal 1

detail X

index area

terminal 1

e1

C

index area

y1 C

y

e

b

v

M C A B

2

w

M

C

6

L

1

7

Eh

e

14

8

13

9

Dh

X

0

2.5

5 mm

UNIT

A(1)

A1

b

c

D(1)

Dh

E(1)

Eh

e

e1

L

v

w

y

y1

max.

mm

1

0.05

0.30

0.2

3.1

1.65

2.6

1.15

0.5

2

0.5

0.1

0.05

0.05

0.1

0.00

0.18

2.9

1.35

2.4

0.85

0.3

OUTLINE

REFERENCES

EUROPEAN

ISSUE DATE

VERSION

IEC

JEDEC

JEITA

PROJECTION

SOT762-1

- - -

MO-241

- - -

02-10-17

03-01-27

2003 Oct 30

21