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SNJ54ALS645AJ Datasheet(PDF) 3 Page - Texas Instruments |
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SNJ54ALS645AJ Datasheet(HTML) 3 Page - Texas Instruments |
3 / 9 page SN54ALS645A, SN54AS645, SN74ALS645A, SN74AS645 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS278 – JANUARY 1995 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN54ALS645A SN74ALS645A 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 † 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. switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX# UNIT SN54ALS645A SN74ALS645A MIN MAX MIN MAX tPLH AorB BorA 1 19 3 10 ns tPHL A or B B or A 1 14 3 10 ns tPZH OE AorB 2 30 5 20 ns tPZL OE A or B 2 29 5 20 ns tPHZ OE AorB 2 14 2 10 ns tPLZ OE A or B 2 30 4 15 ns # For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. |
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