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SN74AHCT14DR Fiches technique(PDF) 6 Page - Texas Instruments |
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SN74AHCT14DR Fiches technique(HTML) 6 Page - Texas Instruments |
6 / 33 page SN54AHCT14, SN74AHCT14 SCLS246Q – OCTOBER 1995 – REVISED JULY 2014 www.ti.com 7.7 Noise Characteristics VCC = 5 V, CL = 50 pF, TA = 25°C (1) SN74AHCT14 PARAMETER UNIT MIN TYP MAX VOL(P) Quiet output, maximum dynamic VOL 0.9 V VOL(V) Quiet output, minimum dynamic VOL –0.7 V VOH(V) Quiet output, minimum dynamic VOH 4.3 V VIH(D) High-level dynamic input voltage 2.1 V VIL(D) Low-level dynamic input voltage 0.5 V (1) Characteristics are for surface-mount packages only. 7.8 Operating Characteristics VCC = 5 V, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance No load, f = 1 MHz 112 pF 7.9 Typical Characteristics One common misconception is that the current consumption will be less when switching a slow signal into a Schmitt trigger. This is partly true because the Schmitt trigger prevents oscillation which can draw a lot of current; however, you will see higher ICC current due to the amount of time the input is not at the rail. This is Delta ICC. Delta ICC is where the inputs are not at the rails and upper or lower drive transistors are partially on. Figure 1 shows ICC across the input voltage sweep. Figure 1. Supply Current vs Input Voltage 6 Submit Documentation Feedback Copyright © 1995–2014, Texas Instruments Incorporated Product Folder Links: SN54AHCT14 SN74AHCT14 |
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