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SN74BCT648DWR Arkusz danych(PDF) 7 Page - Texas Instruments |
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SN74BCT648DWR Arkusz danych(HTML) 7 Page - Texas Instruments |
7 / 8 page SN54BCT648, SN74BCT648 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3STATE OUTPUTS SCBS050B − MAY 1990 − REVISED APRIL 1994 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (unless otherwise noted) (see Note 2) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 5 V, TA = 25°C SN54BCT648 SN74BCT648 UNIT PARAMETER (INPUT) (OUTPUT) MIN TYP MAX MIN MAX MIN MAX UNIT fmax 67 110 67 67 MHz tPLH CLKBA or CLKAB A or B 3.7 7.4 10.3 3.7 13.4 3.7 12.1 ns tPHL CLKBA or CLKAB A or B 4.3 7.8 10.6 4.3 13.2 4.3 12.5 ns tPLH A or B B or A 3.8 7.4 9.9 3.8 12.8 3.8 12.2 ns tPHL A or B B or A 3.3 6.5 8.9 3.3 11.2 3.3 10.1 ns tPLH SAB or SBA† A or B 3.3 6.2 8.4 3.3 10.7 3.3 9.7 ns tPHL SAB or SBA† (with A or B high) A or B 5.3 9.6 12.6 5.3 16.5 5.3 15.5 ns tPLH SBA or SAB† A or B 4.6 8.8 11.7 4.6 16.5 4.6 14.3 ns tPHL SBA or SAB† (with A or B low) A or B 4.9 8.4 11.1 4.9 13.8 4.9 13 ns tPZH OE A or B 4.5 8.4 11 4.5 14.4 4.5 13.5 ns tPZL OE A or B 4.9 9.2 12.2 4.9 16 4.9 15 ns tPHZ OE A or B 4 7.3 9.7 4 12 4 11.2 ns tPLZ OE A or B 3.5 6.6 9.3 3.5 11.6 3.5 10.5 ns tPZH DIR A or B 3.1 7.4 11 3.1 14.1 3.1 13.4 ns tPZL DIR A or B 3.8 8.3 12.2 3.8 15.5 3.8 14.7 ns tPHZ DIR A or B 4.3 8.3 11.6 3.5 14.3 4.3 13.9 ns tPLZ DIR A or B 2.7 6.7 9.9 2.7 12.8 2.7 11.9 ns † These parameters are measured with the internal output state of the storage register opposite to that of the bus input. NOTE 2: Load circuits and voltage waveforms are shown in Section 1. |
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