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SN74HCS03-Q1 Datasheet(Fiches technique) 8 Page - Texas Instruments

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Numéro de pièce SN74HCS03-Q1
Description  SN74HCS03-Q1 Automotive Quadruple 2-Input NAND Gates with Open-Drain Outputs and Schmitt-Trigger Inputs
Télécharger  16 Pages
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Fabricant  TI1 [Texas Instruments]
Site Internet  http://www.ti.com
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SN74HCS03-Q1 Datasheet(HTML) 8 Page - Texas Instruments

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One of Four Channels
xA
xB
xY
8
SN74HCS03-Q1
SCLS759 – APRIL 2020
www.ti.com
Product Folder Links: SN74HCS03-Q1
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Copyright © 2020, Texas Instruments Incorporated
8 Detailed Description
8.1 Overview
This device contains four independent 2-input NAND gates with open-drain outputs and Schmitt-trigger inputs.
Each gate performs the Boolean function Y = A
● B in positive logic.
8.2 Functional Block Diagram
8.3 Feature Description
8.3.1 CMOS Open-Drain Outputs
The open-drain output allows the device to sink current to GND but not to source current from VCC. When the
output is not actively pulling the line low, it will go into a high impedance state. This allows the device to be used
for a wide variety of applications, including up-translation and down-translation, as the output voltage can be
determined by an external pull-up resistor.
The current drive capability of this device creates fast edges into light loads, so routing and load conditions
should be considered to prevent ringing. Additionally, the outputs of this device are capable of driving larger
currents than the device can sustain without being damaged. It is important for the power output of the device to
be limited to avoid thermal runaway and damage due to over-current. The electrical and thermal limits defined
the in the Absolute Maximum Ratingsmust be followed at all times.
8.3.2 CMOS Schmitt-Trigger Inputs
Standard CMOS inputs are high impedance and are typically modeled as a resistor in parallel with the input
capacitance given in the Electrical Characteristics. The worst case resistance is calculated with the maximum
input voltage, given in the Absolute Maximum Ratings, and the maximum input leakage current, given in the
Electrical Characteristics, using ohm's law (R = V ÷ I).
The Schmitt-trigger input architecture provides hysteresis as defined by ΔVT in the Electrical Characteristics,
which makes this device extremely tolerant to slow or noisy inputs. While the inputs can be driven much slower
than standard CMOS inputs, it is still recommended to properly terminate unused inputs. Driving the inputs slowly
will also increase dynamic current consumption of the device. For additional information regarding Schmitt-trigger
inputs, please see Understanding Schmitt Triggers.


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