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SN74F245NE4 데이터시트(PDF) 4 Page - Texas Instruments |
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SN74F245NE4 데이터시트(HTML) 4 Page - Texas Instruments |
4 / 19 page SN54F245, SN74F245 OCTAL BUS TRANSCEIVERS WITH 3-STATE OUTPUTS SDFS010A – MARCH 1987 – REVISED OCTOBER 1993 2–4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics (see Note 2) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 5 V, CL = 50 pF, RL = 500 Ω, TA = 25°C VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX† UNIT (INPUT) (OUTPUT) ′F245 SN54F245 SN74F245 MIN TYP MAX MIN MAX MIN MAX tPLH AorB BorA 1.7 3.8 6 1.2 7.5 1.7 7 ns tPHL A or B B or A 1.7 4.2 6 1.2 7.5 1.7 7 ns tPZH OE AorB 2.2 4.9 7 1.7 9 2.2 8 ns tPZL OE A or B 2.7 5.6 8 2.2 10 2.7 9 ns tPHZ OE AorB 2.2 4.6 6.5 1.7 9 2.2 7.5 ns tPLZ OE A or B 1.2 4.6 6.5 1.2 10 1.2 7.5 ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. NOTE 2: Load circuits and waveforms are shown in Section 1. |
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