74AHC3G14(2009) Ver la hoja de datos (PDF) - NXP Semiconductors.

Número de pieza

componentes Descripción

Fabricante

74AHC3G14
(Rev.:2009)

Inverting Schmitt trigger

NXP Semiconductors. 

NXP Semiconductors

74AHC3G14; 74AHCT3G14

Inverting Schmitt trigger

Table 9. Dynamic characteristics …continued

GND = 0 V; tr = tf ≤ 3.0 ns; for test circuit see Figure 7.

Symbol Parameter Conditions

25 °C

−40 °C to +85 °C −40 °C to +125 °C Unit

Min Typ Max Min Max

Min

Max

74AHCT3G14

tpd

propagation nA to nY;

[1]

delay

VCC = 4.5 V to 5.5 V

[3]

CL = 15 pF

- 4.1 7.0 1.0

8.0

1.0

9.0 ns

CL = 50 pF

- 5.9 8.5 1.0

10.0

1.0

11.0 ns

CPD

power

per buffer;

[4] -

12

-

-

-

-

-

pF

dissipation CL = 50 pF; fi = 1 MHz;

capacitance VI = GND to VCC

[1] tpd is the same as tPLH and tPHL.

[2] Typical values are measured at VCC = 3.3 V.

[3] Typical values are measured at VCC = 5.0 V.

[4] CPD is used to determine the dynamic power dissipation PD (µW).

PD = CPD × VCC2 × fi + Σ (CL × VCC2 × fo) where:

fi = input frequency in MHz;

fo = output frequency in MHz;

CL = output load capacitance in pF;

VCC = supply voltage in V;

Σ(CL × VCC2 × fo) = sum of the outputs.

13. Waveforms

A input

Y output

VM

tPHL

VM

The test data is given in Table 10

tPLH

mna033

Fig 6. The input (nA) to output (nY) propagation

delays

Table 10. Test data

Type number

74AHC3G14

74AHCT3G14

Input

VI

GND to VCC

GND to 3.0 V

VCC

PULSE

VI

GENERATOR

VO

DUT

RT

CL

mna101

Fig 7.

Test data is given in Table 10.

Definitions for test circuit:

CL = Load capacitance.

RT = Termination resistance should be equal to output

impedance Zo of the pulse generator.

Load circuit for measuring switching times

VM

0.5 × VCC

1.5 V

Output

VM

0.5 × VCC

0.5 × VCC

74AHC_AHCT3G14_4

Product data sheet

Rev. 04 — 5 May 2009

© NXP B.V. 2009. All rights reserved.

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