A

B

Y

C

R

SN54LVC08A, SN74LVC08A

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SCAS283S – JANUARY 1993 – REVISED AUGUST 2015

10 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.

10.1 Application Information

The SN74LVC08A is used to drive CMOS device and used for implementing AND logic. LVC famiy can support

10.2 Typical Application

Figure 5. Three Input AND Gate Implementation and Driving LED

10.2.1 Design Requirements

This 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 high drive will also create fast edges into light loads

so routing and load conditions should be considered to prevent ringing.

10.2.2 Detailed Design Procedure

SN74LVC08A contains four AND gates in one package which can be used for individual AND function or to

implement complex Bolean logic. Figure 5 shows an example of implementing 3input AND function. AB are

inputs for AND gate which are connected to another AND gate. Z= A·B·C. SN74LVC08A support high drive

current of 24 mA which can be used to drive LED's of even Drive low current signal FETs, an example is shown

be 10 mA, and the forward-voltage of LED is 2.5 V, then R as shown in Figure 5 is calculated using Equation 1

below:

(1)

R = (3 – 2.5) / 0.01 = 50

Ω

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