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SN74ALS640B Datasheet(PDF) 4 Page - Texas Instruments |
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SN74ALS640B Datasheet(HTML) 4 Page - Texas Instruments |
4 / 20 page ![]() SN54ALS640B, SN54AS640, SN74ALS640B, SN74AS640 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS122A – DECEMBER 1983 – REVISED JANUARY 1995 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage, VI: All inputs 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I/O ports 5.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA: SN54AS640 – 55 °C to 125°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN74AS640 0 °C to 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range – 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. recommended operating conditions SN54AS640 SN74AS640 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 0.8 0.8 V IOH High-level output current –12 –15 mA IOL Low-level output current 48 64 mA TA Operating free-air temperature –55 125 0 70 °C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN54AS640 SN74AS640 UNIT PARAMETER TEST CONDITIONS MIN TYP‡ MAX MIN TYP‡ MAX UNIT VIK VCC = 4.5 V, II = – 18 mA – 1.2 – 1.2 V VCC = 4.5 V, IOH = – 2 mA VCC –2 VCC = 4.5 V to 5.5 V, IOH = – 2 mA VCC –2 VOH IOH = – 3 mA 2.4 3.2 2.4 3.2 V VCC = 4.5 V IOH = – 12 mA 2.4 IOH = – 15 mA 2.4 VOL VCC =4 5V IOL = 48 mA 0.3 0.55 V VOL VCC = 4.5 V IOL = 64 mA 0.35 0.55 V 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 70 70 µA IIL Control inputs VCC =5 5V VI =0 4V – 0.5 – 0.5 mA IIL A or B ports§ VCC = 5.5 V, VI = 0.4 V – 0.75 – 0.75 mA IO¶ VCC = 5.5 V, VO = 2.25 V –50 – 150 –50 – 150 mA Outputs high 37 58 37 58 ICC VCC = 5.5 V Outputs low 78 123 78 123 mA Outputs disabled 51 80 51 80 ‡ All typical values are at 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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