8 Application and Implementation

8.1 Application Information

The SN74LVC86A device is a high-drive, open-drain CMOS device that can be used for a multitude of buffer-

type functions. It can produce 24 mA of drive current at 3 V. Therefore, this device is ideal for driving multiple

inputs and for high-speed applications up to 100 MHz. The inputs and outputs are 5.5-V tolerant allowing the

device to translate up to 5.5 V or down to VCC.

8.2 Typical Application

1B

1Y

1A

1.65-V to 3.6-V VCC

System Inputs/MCU

System Outputs/MCU

4B

4Y

4A

Figure 8-1. Typical OR Gate Application and Supply Voltage

8.2.1 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.

8.2.2 Detailed Design Procedure

1. Recommended Input Conditions

• Rise time and fall time specs: See (Δt/ΔV) in the Section 5.3 table.

• 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 5.5 V at any valid VCC.

2. Recommend Output Conditions

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

• Outputs should not be pulled above 5.5 V.

SN54LVC86A, SN74LVC86A

SCAS288R – JANUARY 1993 – REVISED AUGUST 2024

www.ti.com

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