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SN74HC244DWE4 Scheda tecnica(PDF) 4 Page - Texas Instruments |
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SN74HC244DWE4 Scheda tecnica(HTML) 4 Page - Texas Instruments |
4 / 32 page 4 SN54HC244, SN74HC244 SCLS130E – DECEMBER 1982 – REVISED MAY 2016 www.ti.com Product Folder Links: SN54HC244 SN74HC244 Submit Documentation Feedback Copyright © 1982–2016, Texas Instruments Incorporated (1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, which do not imply functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. (2) The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 6 Specifications 6.1 Absolute Maximum Ratings over operating free-air temperature range (unless otherwise noted) (1) MIN MAX UNIT Supply voltage range, VCC –0.5 7 V Input clamp current, IIK VI < 0 or VI > VCC (2) ±20 mA Output clamp current, IOK VO < 0 or VO > VCC (2) ±20 mA Continuous output current, IO VO = 0 or VCC ±35 mA Continuous current through VCC or GND ±70 mA Junction Temperature, TJ 150 °C Storage temperature, Tstg –65 150 °C (1) JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process. (2) JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process. 6.2 ESD Ratings SN74HC244 VALUE UNIT V(ESD) Electrostatic discharge Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001(1) ±2000 V Charged-device model (CDM), per JEDEC specification JESD22-C101(2) ±1000 (1) All unused inputs of the device must be held at VCC or GND to ensure proper device operation. See the Texas Instruments application report, Implications of Slow or Floating CMOS Inputs, SCBA004. 6.3 Recommended Operating Conditions over operating free-air temperature range (unless otherwise noted) (1) MIN NOM MAX UNIT VCC Supply voltage 2 5 6 V VIH High-level input voltage VCC = 2 V 1.5 V VCC = 4.5 V 3.15 VCC = 6 V 4.2 VIL Low-level input voltage VCC = 2 V 0.5 V VCC = 4.5 V 1.35 VCC = 6 V 1.8 VI Input voltage 0 VCC V VO Output voltage 0 VCC V Δt/Δv Input transition rise and fall time VCC = 2 V 1000 ns/V VCC = 4.5 V 500 VCC = 6 V 400 Cpd Power dissipation capacitance per buffer or driver (no load) 35 pF TA Operating free-air temperature SN54HC244 –55 125 °C SN74HC244 –40 85 |
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