Buffer Function

VPU

HC05

uC or Logic

HC05

uC or Logic

Wired OR

uC or Logic

uC or Logic

HC05

VPU

Basic LED Driver

SN54HC05, SN74HC05

SCLS080E – FEBRUARY 2015 – REVISED MARCH 2015

www.ti.com

9 Application and Implementation

NOTE

Information in the following applications sections is not part of the TI component

specification, and TI does not warrant its accuracy or completeness. TI’s customers are

responsible for determining suitability of components for their purposes. Customers should

validate and test their design implementation to confirm system functionality.

9.1 Application Information

The SN74HC05 device is a low drive open-drain CMOS device that can be used for a multitude of buffer type

down translation.

9.2 Typical Application

Figure 5. Simplified Application Schematic

9.2.1 Design Requirements

This device uses CMOS technology and is open-drain so it has low-output drive only. Take care to avoid bus

contention because it can drive currents that would exceed maximum limits. Parallel output drive can create fast

edges into light loads so consider routing and load conditions to prevent ringing.

9.2.2 Detailed Design Procedure

•

Recommended input conditions:

–

Rise time and fall time specs see (

Δt/ΔV) in Recommended Operating Conditions.

–

•

Recommended output conditions:

–

Load currents should not exceed 25 mA per output and 50 mA total for the part.

8

Submit Documentation Feedback

Copyright © 2015, Texas Instruments Incorporated

Product Folder Links: SN54HC05 SN74HC05