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SN74HC244QPWRQ1 Datasheet(PDF) 2 Page - Texas Instruments |
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SN74HC244QPWRQ1 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 11 page SN74HC244Q1 OCTAL BUFFER AND LINE DRIVER WITH 3STATE OUTPUTS SCLS543A − SEPTEMBER 2002 − REVISED APRIL 2008 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 logic diagram (positive logic) 1 2 4 6 8 19 11 13 15 17 3 5 7 9 12 14 16 18 1A1 1A2 1A3 1A4 1Y1 2A1 2A2 2A3 2A4 2Y1 1Y2 1Y3 1Y4 2Y2 2Y3 2Y4 2OE 1OE absolute maximum ratings over operating free-air temperature range† Supply voltage range, VCC −0.5 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1) ±20 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1) ±20 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous output current, IO (VO = 0 to VCC) ±35 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Continuous current through VCC or GND ±70 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Package thermal impedance, θJA (see Note 2): DW package 58 °C/W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . PW package 83 °C/W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg −65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. NOTES: 1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. The package thermal impedance is calculated in accordance with JESD 51-7. recommended operating conditions (see Note 3) MIN NOM MAX UNIT VCC Supply voltage 2 5 6 V VCC = 2 V 1.5 VIH High-level input voltage VCC = 4.5 V 3.15 V VIH High-level input voltage VCC = 6 V 4.2 V VCC = 2 V 0.5 VIL Low-level input voltage VCC = 4.5 V 1.35 V VIL Low-level input voltage VCC = 6 V 1.8 V VI Input voltage 0 VCC V VO Output voltage 0 VCC V VCC = 2 V 1000 tt Input transition (rise and fall) time VCC = 4.5 V 500 ns tt Input transition (rise and fall) time VCC = 6 V 400 ns TA Operating free-air temperature −40 125 °C NOTE 3: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. |
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