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SN74AHCT244QPWR Datasheet(PDF) 3 Page - Texas Instruments |
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SN74AHCT244QPWR Datasheet(HTML) 3 Page - Texas Instruments |
3 / 13 page SN74AHCT244Q OCTAL BUFFER/DRIVER WITH 3-STATE OUTPUTS SGDS024 – FEBRUARY 2002 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 recommended operating conditions (see Note 3) MIN MAX UNIT VCC Supply voltage 4.5 5.5 V VIH High-level input voltage 2 V VIL Low-level input voltage 0.8 V VI Input voltage 0 5.5 V VO Output voltage 0 VCC V IOH High-level output current –8 mA IOL Low-level output current 8 mA 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. electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VCC TA = 25°C MIN MAX UNIT PARAMETER TEST CONDITIONS VCC MIN TYP MAX MIN MAX UNIT VOH IOH = –50 mA 45 V 4.4 4.5 4.4 V VOH IOH = –8 mA 4.5 V 3.94 3.8 V VOL IOL = 50 mA 45 V 0.1 0.1 V VOL IOL = 8 mA 4.5 V 0.36 0.44 V IOZ VO = VCC or GND 5.5 V ±0.25 ±2.5 mA II VI = 5.5 V or GND 0 V to 5.5 V ±0.1 ±1 mA ICC VI = VCC or GND, IO = 0 5.5 V 4 40 mA ∆ICC† One input at 3.4 V, Other inputs at VCC or GND 5.5 V 1.35 1.5 mA Ci VI = VCC or GND 5 V 2.5 10 pF Co VO = VCC or GND 5 V 3 pF † This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V or VCC. switching characteristics over recommended operating free-air temperature range, VCC = 5 V ± 0.5 V (unless otherwise noted) (see Figure 1) PARAMETER FROM TO LOAD TA = 25°C MIN MAX UNIT PARAMETER (INPUT) (OUTPUT) CAPACITANCE MIN TYP MAX MIN MAX UNIT tPLH A Y CL =15 pF 5.4 7.4 1 8.5 ns tPHL A Y CL = 15 pF 5.4 7.4 1 8.5 ns tPZH OE Y CL =15 pF 7.7 10.4 1 12 ns tPZL OE Y CL = 15 pF 7.7 10.4 1 12 ns tPHZ OE Y CL =15 pF 5 9.4 1 10 ns tPLZ OE Y CL = 15 pF 5 9.4 1 10 ns tPLH A Y CL =50 pF 5.9 8.4 1 9.5 ns tPHL A Y CL = 50 pF 5.9 8.4 1 9.5 ns tPZH OE Y CL =50 pF 8.2 11.4 1 13 ns tPZL OE Y CL = 50 pF 8.2 11.4 1 13 ns tPHZ OE Y CL =50 pF 8.8 11.4 1 13 ns tPLZ OE Y CL = 50 pF 8.8 11.4 1 13 ns tsk(o) CL = 50 pF 1 ns |
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