74HC21

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© NXP Semiconductors N.V. 2015. All rights reserved.

Product data sheet

Rev. 7 — 30 November 2015

7 of 14

NXP Semiconductors

74HC21

Dual 4-input AND gate

Test data is given in Table 9.

Definitions test circuit:

RT = termination resistance should be equal to output impedance Zo of the pulse generator.

CL = load capacitance including jig and probe capacitance.

Fig 8.

Test circuit for measuring switching times

Table 9.

Test data

Type

Input

Load

Test

VI

tr, tf

CL

74HC21

VCC

6.0 ns

15 pF, 50 pF

tPLH, tPHL

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