MCU

(MSP43x)

Temp.

Sensor

Y

EN

B

A

9

SN74AHC1G08

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SCLS314P – MARCH 1996 – REVISED MARCH 2016

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Copyright © 1996–2016, Texas Instruments Incorporated

9 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.

9.1 Application Information

A common application for AND gates is their use in power sequencing. Power sequencing is often employed in

applications that require a processor or other delicate device with specific voltage timing requirements in order to

protect the device from malfunctioning. Using the SN74AHC1G08 to verify that the processor has turned on can

protect it from any harmful signals.

9.2 Typical Application

Figure 4. Power Sequencing Application

9.2.1 Design Requirements

The SN74AHC1G08 device uses CMOS technology and has balanced output drive. Take care to avoid bus

contention because it can drive currents that would exceed maximum limits.

The SN74AHC1G08 allows switching control of analog and digital signals with a digital control signal. All

9.2.2 Detailed Design Procedure

1. Recommended input conditions:

–

For rise time and fall time specifications, see

Δt/Δv in the Recommended Operating Conditions table.

–

–

2. Recommended output conditions:

–

Load currents should not exceed ±50 mA.

3. Frequency selection criterion:

–

The effects of frequency upon the device's power consumption should be studied in CMOS Power

Consumption and CPD Calculation, SCAA035.

–

Added trace resistance and capacitance can reduce maximum frequency capability; follow the layout

practices listed in the Layout section.