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74LVC2G241DCTRE4 데이터시트(PDF) 10 Page - Texas Instruments |
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74LVC2G241DCTRE4 데이터시트(HTML) 10 Page - Texas Instruments |
10 / 22 page SN74LVC2G241 (One driver) Physical Push Bu tton Microprocessor VCC SN74LVC2G241 SCES210O – APRIL 1999 – REVISED DECEMBER 2015 www.ti.com 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 Typical Application shows a simple application where a physical push button is connected to the SN74LVC2G241. The push button is in a physical location far enough away from the processor that the input signal is weak and needs to be redriven. The SN74LVC2G241 acts as a redriver, providing a strong input signal to the processor with as little as 1 ns of propagation delay. 9.2 Typical Application Figure 4. SN74LVC2G241 Application 9.2.1 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 also creates fast edges into light loads, so routing and load conditions must be considered to prevent ringing. 9.2.2 Detailed Design Procedure 1. Recommended Input Conditions – Rise time and fall time specs. See ( Δt/ΔV) in Recommended Operating Conditions. – Specified high and low levels. See (VIH and VIL) in Recommended Operating Conditions. – Inputs are overvoltage tolerant allowing them to go as high as (VI max) in Recommended Operating Conditions at any valid VCC. 2. Recommend Output Conditions – Load currents must not exceed (IO max) per output and must not exceed (Continuous current through VCC or GND) total current for the part. These limits are located in Absolute Maximum Ratings. – Outputs must not be pulled above VCC during normal operation or 5.5 V in high-z state. 10 Submit Documentation Feedback Copyright © 1999–2015, Texas Instruments Incorporated Product Folder Links: SN74LVC2G241 |
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