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SN74HC257DT 数据表(PDF) 4 Page - Texas Instruments |
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SN74HC257DT 数据表(HTML) 4 Page - Texas Instruments |
4 / 17 page SN54HC257, SN54HC258, SN74HC257, SN74HC258 QUADRUPLE 2LINE TO 1LINE DATA SELECTORS/MULTIPLEXERS WITH 3STATE OUTPUTS SCLS224B − DECEMBER 1982 − REVISED SEPTEMBER 2003 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 recommended operating conditions (see Note 2) SN54HC257, SN54HC258 SN74HC257, SN74HC258 UNIT MIN NOM MAX MIN NOM MAX UNIT VCC Supply voltage 2 5 6 2 5 6 V VCC = 2 V 1.5 1.5 VIH High-level input voltage VCC = 4.5 V 3.15 3.15 V VIH High-level input voltage VCC = 6 V 4.2 4.2 V VCC = 2 V 0.3 0.5 VIL Low-level input voltage VCC = 4.5 V 0.9 1.35 V VIL Low-level input voltage VCC = 6 V 1.2 1.8 V VI Input voltage 0 VCC 0 VCC V VO Output voltage 0 VCC 0 VCC V VCC = 2 V 1000 1000 ∆t/∆v Input transition rise/fall time VCC = 4.5 V 500 500 ns ∆t/∆v Input transition rise/fall time VCC = 6 V 400 400 ns TA Operating free-air temperature −55 125 −40 85 °C NOTE 2: 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 SN54HC257, SN54HC258 SN74HC257, SN74HC258 UNIT PARAMETER TEST CONDITIONS VCC MIN TYP MAX MIN MAX MIN MAX UNIT 2 V 1.9 1.998 1.9 1.9 IOH = −20 µA 4.5 V 4.4 4.499 4.4 4.4 VOH VI = VIH or VIL IOH = −20 µA 6 V 5.9 5.999 5.9 5.9 V VOH VI = VIH or VIL IOH = −6 mA 4.5 V 3.98 4.3 3.7 3.84 V IOH = −7.8 mA 6 V 5.48 5.8 5.2 5.34 2 V 0.002 0.1 0.1 0.1 IOL = 20 µA 4.5 V 0.001 0.1 0.1 0.1 VOL VI = VIH or VIL IOL = 20 µA 6 V 0.001 0.1 0.1 0.1 V VOL VI = VIH or VIL IOL = 6 mA 4.5 V 0.17 0.26 0.4 0.33 V IOL = 7.8 mA 6 V 0.15 0.26 0.4 0.33 II VI = VCC or 0 6 V ±0.1 ±100 ±1000 ±1000 nA IOZ 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 2 V to 6 V 3 10 10 10 pF |
类似零件编号 - SN74HC257DT |
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类似说明 - SN74HC257DT |
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