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SN74AHC08DRG4 데이터시트(PDF) 10 Page - Texas Instruments |
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SN74AHC08DRG4 데이터시트(HTML) 10 Page - Texas Instruments |
10 / 31 page MCU (MSP43x) Temp. Sensor Y VCC = 5 V EN VO B A SN74AHC08, SN54AHC08 SCLS236J – MARCH 1996 – REVISED DECEMBER 2015 www.ti.com 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 A common application for AND gates is the 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 SN74AHC08 to verify that the processor has turned on can protect it from harmful signals. 10.2 Typical Application Figure 3. Typical Application Diagram 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 must be considered to prevent ringing. 10.2.2 Detailed Design Procedure 1. Recommended input conditions – Rise time and fall time specs: See ( Δt/Δv) in the Recommended Operating Conditions table. – Specified High and low levels: See (VIH and VIL) in the Recommended Operating Conditions table. – Inputs are overvoltage tolerant allowing them to go as high as 5.5 V at any valid VCC 2. Recommend output conditions – Load currents should not exceed 25 mA per output and 50 mA total for the part – Outputs should not be pulled above VCC 10 Submit Documentation Feedback Copyright © 1996–2015, Texas Instruments Incorporated Product Folder Links: SN74AHC08 SN54AHC08 |
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