A

B

Y

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9

SN54HC08, SN74HC08

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SCLS081G – DECEMBER 1982 – REVISED JUNE 2016

Product Folder Links: SN54HC08 SN74HC08

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Copyright © 1982–2016, Texas Instruments Incorporated

8 Detailed Description

8.1 Overview

The SNx4HC08 contains quadruple 2-input positive AND gate device and performs the Boolean function

Y = A

● B. This device is useful when multiple AND functions are used in the system.

8.2 Functional Block Diagram

Figure 3. Logic Diagram (Positive Logic)

8.3 Feature Description

The device can operate from 2 V to 6 V, allowing a wide operating voltage.

8.4 Device Functional Modes

Table 1 lists the functional modes for the SN54HC08 and SN74HC08 devices.

Table 1. Function Table (Each Inverter)

INPUTS

OUTPUT

A

B

Y

H

H

H

L

X

L

X

L

L