0.1 F

µ

5 V Regulated

5-V Accessory

3.3-V Bus Driver

SN54AHCT86, SN74AHCT86

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SCLS250N – OCTOBER 1995 – REVISED AUGUST 2014

10 Application and Implementation

10.1 Application Information

The SNx4AHCT86 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 will minimize overshoot and undershoot on

This feature makes the device ideal for translating up from 3.3 V to 5 V. Figure 5 shows this type of translation.

10.2 Typical Application

Figure 4. 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; therefore, routing and load conditions should be considered to prevent ringing.

10.2.2 Detailed Design Procedure

1. Recommended input conditions

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Rise time and fall time specs: 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 25 mA per output and 75 mA total for the part

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Product Folder Links: SN54AHCT86 SN74AHCT86