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SN74ALS245A-1DWRG4 데이터시트(PDF) 3 Page - Texas Instruments |
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SN74ALS245A-1DWRG4 데이터시트(HTML) 3 Page - Texas Instruments |
3 / 22 page SN54ALS245A, SN54AS245, SN74ALS245A, SN74AS245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS272A – NOVEMBER 1994 – REVISED JANUARY 2003 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 recommended operating conditions (see Note 2) SN54ALS245A SN74ALS245A UNIT MIN NOM MAX MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V VIH High-level input voltage 2 2 V VIL Low-level input voltage 0.7 0.8 V IOH High-level output current – 12 – 15 mA IOL Low level output current 12 24 mA IOL Low-level output current 48† mA TA Operating free-air temperature – 55 125 0 70 °C † Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V 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 SN54ALS245A SN74ALS245A UNIT PARAMETER TEST CONDITIONS MIN TYP‡ MAX MIN TYP‡ MAX UNIT VIK VCC = 4.5 V, II = – 18 mA –1.5 –1.5 V VCC = 4.5 V to 5.5 V, IOH = – 0.4 mA VCC – 2 VCC – 2 VOH IOH = – 3 mA 2.4 3.2 2.4 3.2 V VOH VCC = 4.5 V IOH = – 12 mA 2 V IOH = – 15 mA 2 IOL= 12 mA 0.25 0.4 0.25 0.4 VOL VCC = 4.5 V IOL = 24 mA 0.35 0.5 V IOL = 48 mA† 0.35 0.5 II Control inputs VCC =5 5V VI = 7 V 0.1 0.1 mA II A or B ports VCC = 5.5 V VI = 5.5 V 0.1 0.1 mA IIH Control inputs VCC =5 5V VI =2 7V 20 20 µA IIH A or B ports§ VCC = 5.5 V, VI = 2.7 V 20 20 µA IIL Control inputs VCC =5 5V VI =0 4V – 0.1 – 0.1 mA IIL A or B ports§ VCC = 5.5 V, VI = 0.4 V – 0.1 – 0.1 mA IO¶ VCC = 5.5 V, VO = 2.25 V – 20 –112 – 30 –112 mA Outputs high 30 48 30 45 ICC VCC = 5.5 V Outputs low 36 60 36 55 mA Outputs disabled 38 63 38 58 † Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V ‡ All typical values are VCC = 5 V, TA = 25°C. § For I/O ports, the parameters IIH and IIL include the off-state output current. ¶ The output conditions have been chosen to produce a current that closely approximates one-half of the true short-circuit output current, IOS. |
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