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SN74LVC08APWRE4 数据表(PDF) 11 Page - Texas Instruments |
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SN74LVC08APWRE4 数据表(HTML) 11 Page - Texas Instruments |
11 / 32 page A B Y C R SN54LVC08A, SN74LVC08A www.ti.com 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 current drive of about 24 mA at 3-V VCC. The inputs for SN74LVC08 are 5.5-V tolerant allowing it to translate down to VCC. 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 in Figure 5 TI recommends to use a series resistance to limit the current. If VCC is 3 V, and LED current should 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: R = (VCC – VLED) / I (1) R = (3 – 2.5) / 0.01 = 50 Ω Copyright © 1993–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: SN54LVC08A SN74LVC08A |
类似零件编号 - SN74LVC08APWRE4 |
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类似说明 - SN74LVC08APWRE4 |
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