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SN74ALS621ADWG4 Scheda tecnica(PDF) 4 Page - Texas Instruments |
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SN74ALS621ADWG4 Scheda tecnica(HTML) 4 Page - Texas Instruments |
4 / 19 page SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623 OCTAL BUS TRANSCEIVERS SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 recommended operating conditions SN74ALS620A SN74ALS623A UNIT MIN NOM MAX VCC Supply voltage 4.5 5 5.5 V VIH High-level input voltage 2 V VIL Low-level input voltage 0.8 V IOH High-level output current –15 mA IOL Low-level output current 24 mA TA Operating free-air temperature 0 70 °C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN74ALS620A SN74ALS623A UNIT MIN TYP† MAX VIK VCC = 4.5 V, II = – 18 mA – 1.2 V VCC = 4.5 V to 5.5 V, IOH = – 0.4 mA VCC –2 VOH VCC =4 5V IOH = – 3 mA 2.4 3.2 V VCC = 4.5 V IOH = – 15 mA 2 VOL VCC =4 5V IOL = 12 mA 0.25 0.4 V VOL VCC = 4.5 V IOL = 24 mA‡ 0.35 0.5 V II Control inputs VCC =5 5V VI = 7 V 0.1 mA II A or B ports VCC = 5.5 V VI = 5.5 V 0.1 mA IIH Control inputs VCC =5 5V VI =2 7V 20 µA IIH A or B ports§ VCC = 5.5 V, VI = 2.7 V 20 µA IIL Control inputs VCC =5 5V VI =0 4V – 0.1 mA IIL A or B ports§ VCC = 5.5 V, VI = 0.4 V – 0.1 mA IO¶ VCC = 5.5 V, VO = 2.25 V –30 –112 mA Outputs high 24 34 SN74ALS620A VCC = 5.5 V Outputs low 31 44 ICC Outputs disabled 33 47 mA ICC Outputs high 32 43 mA SN74ALS623A VCC = 5.5 V Outputs low 39 50 Outputs disabled 42 55 † All typical values are at VCC = 5 V, TA = 25°C. ‡ Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V § 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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