1OE

V

GND

5-V system

CC

µC or

System Logic

µC

System Logic

LEDs

Regulated 3.3 V or 5 V

1A

4A

1Y

4Y

4OE

10

SN74LV125A

SCES124N – DECEMBER 1997 – REVISED JANUARY 2016

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Product Folder Links: SN74LV125A

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Copyright © 1997–2016, Texas Instruments Incorporated

10 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.

10.1 Application Information

The SN74LV125A is a low-drive CMOS device that can be used for a multitude of bus interface type applications

where output ringing is a concern. The low drive and slow edge rates minimize overshoot and undershoot on the

10.2 Typical Application

Figure 5. Typical Application Schematic

10.2.1 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.

10.2.2 Detailed Design Procedure

1. Recommended Input Conditions

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For rise time and fall time specifications, see

Δt/ΔV in the Recommended Operating Conditions table.

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2. Recommend Output Conditions

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Load currents should not exceed 35 mA per output and 70 mA total for the part.

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