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SN74ALS243AN Datasheet(PDF) 3 Page - Texas Instruments |
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SN74ALS243AN Datasheet(HTML) 3 Page - Texas Instruments |
3 / 5 page SN54ALS243A, SN74ALS243A QUADRUPLE BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS069B – DECEMBER 1982 – REVISED DECEMBER 1994 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN54ALS243A SN74ALS243A 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 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 15 30 15 25 ICC VCC = 5.5 V Outputs low 20 35 20 30 mA Outputs disabled 21 37 21 32 † 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. 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 SN54ALS243A SN74ALS243A MIN MAX MIN MAX tPLH AorB BorA 4 15 4 11 ns tPHL A or B B or A 4 15 4 11 ns tPZH OEAB B 7 25 7 20 ns tPZL OEAB B 7 25 7 20 ns tPHZ OEAB B 2 16 2 14 ns tPLZ OEAB B 3 27 3 22 ns tPZH OEBA A 7 25 7 20 ns tPZL OEBA A 7 25 7 20 ns tPHZ OEBA A 2 16 2 14 ns tPLZ OEBA A 3 27 3 22 ns ¶ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. |
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