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SN54AS646 Datasheet(PDF) 10 Page - Texas Instruments |
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SN54AS646 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 18 page SN54ALS646, SN54ALS648, SN54AS646 SN74ALS646A, SN74ALS648A, SN74AS646, SN74AS648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SDAS039F – DECEMBER 1983 – REVISED JANUARY 1995 10 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN54ALS648 SN74ALS648A 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 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 VOL VCC =4 5V IOL = 12 mA 0.25 0.4 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 0.1 mA II A or B ports VCC = 5.5 V VI = 5.5 V 0.1 0.1 mA I Control inputs V5 5 V V2 7 V 20 20 A IIH A or B ports‡ VCC = 5.5 V, VI = 2.7 V 20 20 µA I Control inputs V5 5 V V0 4 V – 0.2 – 0.2 mA IIL A or B ports‡ VCC = 5.5 V, VI = 0.4 V – 0.2 – 0.2 mA IO§ VCC = 5.5 V, VO = 2.25 V –20 –112 –30 –112 mA Outputs high 47 76 47 76 ICC VCC = 5.5 V Outputs low 57 88 57 88 mA Outputs disabled 57 88 57 88 † 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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