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74AHCT3G14GD

Inverting Schmitt trigger

NXP Semiconductors. 

NXP Semiconductors

74AHC3G14; 74AHCT3G14

Inverting Schmitt trigger

200

∆ICC(AV)

(µA)

150

100

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

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

∆ICC(AV) differs with positive or negative input transitions, as shown in Figure 15

and Figure 16.

For 74AHC3G14 and 74AHCT3G14 used in relaxation oscillator circuit, see Figure 17.

Note to the application information:

1. All values given are typical unless otherwise specified.

mna036

positive-going

edge

200

∆ICC(AV)

(µA)

150

100

mna058

positive-going

edge

50

50

negative-going

edge

negative-going

edge

0

0

2.0

4.0

6.0

VCC (V)

0

0

2

4 VCC (V) 6

Linear change of VI between 0.1VCC to 0.9VCC

Fig 15. Average additional ICC for 74AHC3G14 Schmitt

trigger devices

Linear change of VI between 0.1VCC to 0.9VCC

Fig 16. Average additional ICC for 74AHCT3G14

Schmitt trigger devices

R

C

mna035

For 74AHC3G14:

f

=

-1--

T

≈

0---.--5---5---1-×-----R----C---

For 74AHCT3G14: f = T-1-- ≈ 0---.--6---0---1-×-----R----C---

Fig 17. Relaxation oscillator using the 74AHC3G14 and 74AHCT3G14

74AHC_AHCT3G14_4

Product data sheet

Rev. 04 — 5 May 2009

© NXP B.V. 2009. All rights reserved.

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