GND

Logic

Input

Output

Device

A

Y

2

4

9

SN74LVC1GU04

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SCES215Y – APRIL 1999 – REVISED DECEMBER 2017

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Copyright © 1999–2017, Texas Instruments Incorporated

8 Detailed Description

8.1 Overview

The SN74LVC1GU04 device contains one inverter with an unbuffered output with a maximum sink current of

32 mA.

8.2 Functional Block Diagram

Figure 3. Logic Diagram (Positive Logic)

8.3 Feature Description

8.3.1 Balanced High-Drive CMOS Push-Pull Outputs

A balanced output allows the device to sink and source similar currents. The high-drive capability of this device

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

Additionally, the outputs of this device are capable of driving larger currents than the device can sustain without

being damaged. It is important for the power output of the device to be limited to avoid thermal runaway and

damage due to overcurrent. The electrical and thermal limits defined in the Absolute Maximum Ratings must be

followed at all times.

8.3.2 Standard CMOS Inputs

Standard CMOS inputs are high impedance and are typically modeled as a resistor in parallel with the input

capacitance given in the Electrical Characteristics. The worst-case resistance is calculated with the maximum

input voltage, given in the Absolute Maximum Ratings, and the maximum input leakage current, given in the

Electrical Characteristics, using ohm's law (R = V ÷ I).

Signals that are applied to the inputs need to have fast edge rates, as shown by Δt/Δv in the Recommended

Operating Conditions, to avoid excessive current consumption and oscillations. If a slow or noisy input signal is

required, a device with a Schmitt-trigger input should be used to condition the input signal prior to the standard

CMOS input.

8.3.3 Negative Clamping Diodes

The inputs and outputs to this device have negative clamping diodes as shown in Figure 4.

CAUTION

Voltages beyond the values specified in the Absolute Maximum Ratings table can

cause damage to the device. The input negative-voltage and output voltage ratings

may be exceeded if the input and output clamp-current ratings are observed.

Figure 4. Electrical Placement of Clamping Diodes for Each Input and Output