74AHCT240 datasheet(6/13 Pages) NEXPERIA

No de pièce	74AHCT240

Description	Octal buffer/line driver; inverting; 3-state

PDF	13 Pages

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Fabricant	NEXPERIA [Nexperia B.V. All rights reserved]

Site Internet	https://www.nexperia.com/

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Nexperia

74AHCT240

Octal buffer/line driver; inverting; 3-state

10.1. Waveforms and test circuit

nAn input

nYn output

tPHL

tPLH

GND

VOH

VOL

90 %

10 %

90 %

tTHL

tTLH

mgu781

Measurement points are given in Table 8.

VOL and VOH are typical voltage output drop that occur with the output load.

Fig. 5. Propagation delay input (nAn) to output (nYn)

001aae014

tPLZ

tPHZ

outputs

disabled

outputs

enabled

outputs

enabled

nYn output

LOW-to-OFF

OFF-to-LOW

nYn output

HIGH-to-OFF

OFF-to-HIGH

nOE input

VOL

VOH

VCC

GND

tPZL

tPZH

Measurement points are given in Table 8.

VOL and VOH are typical voltage output drop that occur with the output load.

Fig. 6. Enable and disable times

Table 8. Measurement points

Input

Output

1.5 V

0.5VCC

VOL + 0.3 V

VOH - 0.3 V

74AHCT240

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Product data sheet

Rev. 6 — 29 June 2020

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