6 Detailed Description

6.1 Overview

These octal buffers and line drivers are designed specifically to improve both the performance and density

of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The ’HCT240

devices are organized as two 4-bit buffers/drivers with separate output-enable (OE) inputs. When OE is low,

the device passes inverted data from the A inputs to the Y outputs. When OE is high, the outputs are in the

high-impedance state.

6.2 Functional Block Diagram

6.3 Device Functional Modes

Table 6-1. Function Table

(Each Buffer/Driver)

INPUTS

OUTPUT

Y

OE

A

L

H

L

L

L

H

H

X

Z

www.ti.com

SN54HCT240, SN74HCT240

SCLS174H – MARCH 1984 – REVISED AUGUST 2024

Copyright © 2024 Texas Instruments Incorporated

Submit Document Feedback

7

Product Folder Links: SN54HCT240 SN74HCT240