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SN74ALS1245ADW 데이터시트(PDF) 3 Page - Texas Instruments |
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SN74ALS1245ADW 데이터시트(HTML) 3 Page - Texas Instruments |
3 / 5 page SN54ALS1245A, SN74ALS1245A OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDAS245A – DECEMBER 1982 – REVISED 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 SN54ALS1245A SN74ALS1245A 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 VOL VCC =4 5V IOL= 8 mA 0.25 0.4 0.25 0.4 V VOL VCC = 4.5 V IOL = 16 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 21 33 21 30 ICC VCC = 5.5 V Outputs low 23 36 23 33 mA Outputs disabled 25 40 25 36 † All typical values are 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 SN54ALS1245A SN74ALS1245A MIN MAX MIN MAX tPLH AorB BorA 2 19 2 13 ns tPHL A or B B or A 2 15 2 13 ns tPZH OE AorB 8 30 8 25 ns tPZL OE A or B 8 29 8 25 ns tPHZ OE AorB 2 14 2 12 ns tPLZ OE A or B 3 30 3 18 ns ¶ For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. |
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