8 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, as well as validating and testing their design

implementation to confirm system functionality.

8.1 Typical Application

C or System

Logic

1A

4A

1Y

4Y

VCC

GND

C/System

Logic/LEDs

3 V

5 V

1OE

4OE

Figure 8-1. Typical Application Schematic

8.1.1 Design Requirements

This device uses CMOS technology and has balanced output drive. Care should be taken to avoid bus

contention because it can drive currents that would exceed maximum limits. The high drive will also create

fast edges into light loads so routing and load conditions should be considered to prevent ringing.

8.1.2 Detailed Design Procedure

1. Recommended Input Conditions:

• For rise time and fall time specifcations, see (Δt/ΔV) in the Section 5.3 table.

• For specified high and low levels, see (VIH and VIL) in the Section 5.3 table.

• Inputs are overvoltage tolerant allowing them to go as high as (VI max) in the Section 5.3 table at any

valid VCC.

2. Recommend Output Conditions:

• Load currents should not exceed (IO max) per output and should not exceed (Continuous current through

VCC or GND) total current for the part. These limits are located in the Section 5.1 table.

• Outputs should not be pulled above VCC.

• Series resistors on the output may be used if the user desires to slow the output edge signal or limit the

output current.

SN74LVC125A

SCAS290R – JANUARY 2015 – REVISED FEBRUARY 2024

www.ti.com

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