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SN74AHCT14NE4 bảng dữ liệu(PDF) 9 Page - Texas Instruments |
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SN74AHCT14NE4 bảng dữ liệu(HTML) 9 Page - Texas Instruments |
9 / 33 page 5 V 10 k 1/6 W SN74AHCT14 10 nf Circuit Symbol for a Schmitt Trigger SN54AHCT14, SN74AHCT14 www.ti.com SCLS246Q – OCTOBER 1995 – REVISED JULY 2014 10 Application and Implementation 10.1 Application Information Schmitt triggers should be used anytime you need to translate a sign wave into a square wave, or used where a slow or noisy input needs to be sped up or cleaned up as in the switch de-bouncer circuit. 10.2 Typical Application Figure 3. Switch De-bouncer Using Schmitt Trigger Inverter 10.2.1 Design Requirements This device uses CMOS technology and has balanced output drive. Care should be taken 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; therefore, routing and load conditions should 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 Copyright © 1995–2014, Texas Instruments Incorporated Submit Documentation Feedback 9 Product Folder Links: SN54AHCT14 SN74AHCT14 |
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