7 Detailed Description

7.1 Overview

The ’HC4002 logic gate utilizes silicon gate CMOS technology to achieve operating speeds similar to LSTTL

gates with the low power consumption of standard CMOS integrated circuits. All devices have the ability to drive

10 LSTTL loads. The ’HC4002 logic family is functional as well as pin compatible with the standard LS logic

family.

7.2 Functional Block Diagram

Figure 7-1. Functional Diagram

Figure 7-2. Logic Symbol

7.3 Device Functional Modes

Table 7-1. Truth Table(1)

INPUTS

OUTPUT

nA

nB

nC

nD

nY

L

L

L

L

H

H

X

X

X

L

X

H

X

X

L

X

X

H

X

L

X

X

X

H

L

(1)

H = High Voltage Level, L = Low Voltage Level, X = Irrelevant

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CD54HC4002, CD74HC4002

SCHS197F – AUGUST 1997 – REVISED FEBRUARY 2022

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Product Folder Links: CD54HC4002 CD74HC4002