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SN74LVC1GU04

SCES215Y – APRIL 1999 – REVISED DECEMBER 2017

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Feature Description (continued)

The inputs and outputs for this device enter a high-impedance state when the supply voltage is 0 V. The

Characteristics.

8.3.5 Over-voltage Tolerant Inputs

Input signals to this device can be driven above the supply voltage so long as they remain below the maximum

input voltage value specified in the Recommended Operating Conditions.

8.3.6 Unbuffered Logic

A standard CMOS logic function typically consists of at least three stages: the input inverter, the logic function,

and the output inverter. Some devices have multiple stages at the input or output for various reasons. An

unbuffered CMOS logic function eliminates the extra input and output stages; the device only contains the

required logic function which is directly driven from the inputs and directly drives the outputs.

The unbuffered inverter is commonly used in oscillator circuits because it is less sensitive to parameter changes

in the oscillator circuit due to having lower total gain than a buffered equivalent. To learn more about how to use

an unbuffered inverter in an oscillator circuit, see Use of the CMOS Unbuffered Inverter in Oscillator Circuits.

8.4 Device Functional Modes

Table 1 lists the functional modes of the SN74LVC1GU04.

Table 1. Function Table

INPUT

A

OUTPUT

Y

H

L

L

H