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SN74HC125DRE4 데이터시트(PDF) 11 Page - Texas Instruments |
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SN74HC125DRE4 데이터시트(HTML) 11 Page - Texas Instruments |
11 / 28 page SN74HC125 (1 gate) Physical Push Button Microprocessor VCC SN54HC125 SN74HC125 www.ti.com SCLS104E – AUGUST 1984 – REVISED DECEMBER 2015 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 The SNx4HC125 can be used to buffer noisy or weak input signals in order to clean up these signals and drive a strong logic level to a processor or other sampling system. 9.2 Typical Application Figure 3. Typical Application Diagram 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 will also create fast edges into light loads so routing and load conditions should 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 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 (VI maximum) in the Recommended Operating Conditions table at any valid VCC. 2. Recommend Output Conditions – Load currents should not exceed (IO maximum) per output and should not exceed (continuous current through VCC or GND) total current for the part. These limits are located in the Absolute Maximum Ratings table. – Outputs should not be pulled above VCC. Copyright © 1984–2015, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: SN54HC125 SN74HC125 |
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