Diodes 74AHCT138 Manuel d'utilisateur télécharger pdf (Page 5)

74AHCT138

Document number: DS35483 Rev. 2 - 2

5 of 9

www.diodes.com

June 2013

74AHCT138

Switching Characteristics

Symbol Parameter Test Conditions

= +25°C

-40°C to +85°C -40°C to +125°C

Unit

Min Typ Max Min Max Min Max

Propagation Delay

An to Y

Figure 2 C

=15pF

4.5V to 5.5V 0.5 4.4 10.4 1.0 12.0 1.0 13.0

Figure 2 C

= 50pF

4.5V to 5.5V 0.5 6.2 11.4 1.0 13.0 1.0 14.5

Propagation Delay

E3 to Y

Figure 2 C

= 15pF

4.5V to 5.5V 0.5 4.3 9.1 1.0 10.5 1.0 11.5

Figure 2 C

= 50pF

4.5V to 5.5V 0.5 6.2 10.1 1.0 11.5 1.0 13.0

Propagation Delay

n to Yn

Figure 2 C

= 15pF

4.5V to 5.5V 0.5 4.3 9.6 1.0 11.0 1.0 12.0

Figure 2 C

= 50pF

4.5V to 5.5V 0.5 6.2 10.6 1.0 12.0 1.0 13.5

Operating Characteristics (@T

= +25°C, unless otherwise specified.)

Parameter

Test

Conditions

= 5V

Unit

Typ

Power dissipation

capacitance

f = 1 MHz all outputs switching-no load 23 pF

Parameter Measurement Information

Inputs

Input Output

4.5V to 5.5V 3.0 V 3ns 1.5 V

15pF, 50pF

Voltage Waveform

Pulse Duration

Voltage Waveform

Propagation Delay Times

Inverting and Non Inverting Outputs

Notes: A. Includes test lead and test apparatus capacitance.

B. All pulses are supplied at pulse repetition rate ≤ 10 MHz.

C. Inputs are measured separately one transition per measurement.

D. t

PLH

and t

PHL

are the same as t

1 2 3 4 5 6 7 8 9

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Diodes 74AHCT138 Manuel d'utilisateur Page 5

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