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SN74HC245PWE4 Scheda tecnica(PDF) 3 Page - Texas Instruments |
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SN74HC245PWE4 Scheda tecnica(HTML) 3 Page - Texas Instruments |
3 / 16 page SN54HC245, SN74HC245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SCLS131D – DECEMBER 1982 – REVISED AUGUST 2003 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 recommended operating conditions (see Note 3) SN54HC245 SN74HC245 UNIT MIN NOM MAX MIN NOM MAX UNIT VCC Supply voltage 2 5 6 2 5 6 V V High-level input voltage VCC = 2 V 1.5 1.5 V VIH High-level input voltage VCC = 4.5 V 3.15 3.15 V IH VCC = 6 V 4.2 4.2 V Low-level input voltage VCC = 2 V 0.5 0.5 V VIL Low-level input voltage VCC = 4.5 V 1.35 1.35 V IL VCC = 6 V 1.8 1.8 VI Input voltage 0 VCC 0 VCC V VO Output voltage 0 VCC 0 VCC V t/ v Input transition rise/fall time VCC = 2 V 1000 1000 ns ∆t/∆v Input transition rise/fall time VCC = 4.5 V 500 500 ns VCC = 6 V 400 400 TA Operating free-air temperature –55 125 –40 85 °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 SN54HC245 SN74HC245 UNIT PARAMETER TEST CONDITIONS VCC MIN TYP MAX MIN MAX MIN MAX UNIT V V = V or V I = –20 A 2 V 1.9 1.998 1.9 1.9 V V V = V or V IOH = –20 µA 4.5 V 4.4 4.499 4.4 4.4 V VOH VI = VIH or VIL OH 6 V 5.9 5.999 5.9 5.9 V OH IIH IL IOH = –6 mA 4.5 V 3.98 4.3 3.7 3.84 IOH = –7.8 mA 6 V 5.48 5.8 5.2 5.34 V V = V or V I = 20 A 2 V 0.002 0.1 0.1 0.1 V V V = V or V IOL = 20 µA 4.5 V 0.001 0.1 0.1 0.1 V VOL VI = VIH or VIL OL 6 V 0.001 0.1 0.1 0.1 V OL IIH IL IOL = 6 mA 4.5 V 0.17 0.26 0.4 0.33 IOL = 7.8 mA 6 V 0.15 0.26 0.4 0.33 II DIR or OE VI = VCC or 0 6 V ±0.1 ±100 ±1000 ±1000 nA IOZ A or B VO = VCC or 0 6 V ±0.01 ±0.5 ±10 ±5 µA ICC VI = VCC or 0, IO = 0 6 V 8 160 80 µA Ci DIR or OE 2 V to 6 V 3 10 10 10 pF |
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