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7414

Hex inverting Schmitt trigger

Philips Electronics 

Philips Semiconductors

Hex inverting Schmitt trigger

Product specification

74HC14; 74HCT14

Type 74HCT

GND = 0 V; tr = tf = 6 ns; CL = 50 pF

SYMBOL

PARAMETER

Tamb = 25 °C; note 1

tPHL/tPLH

tTHL/tTLH

propagation delay nA to nY

output transition time

Tamb = −40 to +85 °C

tPHL/tPLH

tTHL/tTLH

propagation delay nA to nY

output transition time

Tamb = −40 to +125 °C

tPHL/tPLH

tTHL/tTLH

propagation delay nA to nY

output transition time

TEST CONDITIONS

WAVEFORMS

VCC (V)

MIN.

see Fig.9

see Fig.9

4.5

−

4.5

−

see Fig.9

see Fig.9

4.5

43

4.5

19

see Fig.9

see Fig.9

4.5

−

4.5

−

Note

1. All typical values are measured at Tamb = 25 °C.

TYP.

20

7

−

−

−

−

MAX. UNIT

34

ns

15

ns

−

ns

−

ns

51

ns

22

ns

TRANSFER CHARACTERISTIC WAVEFORMS

VO

VH

VT−

VT+

VI

MNA844

handbook, halfpage

VI

VT+

VH

VT−

VO

MNA845

Fig.7 Transfer characteristic.

VT+ and VT− are between limits of 20% and 70%.

Fig.8 The definitions of VT+, VT− and VH.

2003 Oct 30

13

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