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SN54BCT646 Datasheet(PDF) 7 Page - Texas Instruments |
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SN54BCT646 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 15 page SN54BCT646, SN74BCT646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3STATE OUTPUTS SCBS037D − AUGUST 1989 − REVISED MAY 2004 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (unless otherwise noted) (see Figure 2) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 5 V, TA = 25°C SN54BCT646 SN74BCT646 UNIT PARAMETER (INPUT) (OUTPUT) MIN TYP MAX MIN MAX MIN MAX UNIT fmax 83 83 83 MHz tPLH CLKBA or CLKAB A or B 3.6 7 9.4 3.6 12.4 3.6 11.2 ns tPHL CLKBA or CLKAB A or B 3.9 7 9.2 3.9 11.5 3.9 10.6 ns tPLH A or B B or A 3.1 6 8.1 3.1 11.1 3.1 9.5 ns tPHL A or B B or A 3.7 6.8 8.9 3.7 12.1 3.7 10.5 ns tPLH SAB or SBA† A or B 4.5 8.8 11.2 4.5 15.2 4.5 13.8 ns tPHL SAB or SBA† (with A or B high) A or B 3.3 6 8.1 3.3 9.8 3.3 9.1 ns tPLH SAB or SBA† A or B 3.9 7.7 10.2 3.9 13.3 3.9 12 ns tPHL SAB or SBA† (with A or B low) A or B 4.7 8.3 10.8 4.7 13.7 4.7 12.9 ns tPZH OE A or B 4 7.9 10.7 4 14 4 13.2 ns tPZL OE A or B 4.6 8.8 11.8 4.6 15.4 4.6 14.4 ns tPHZ OE A or B 4 7.2 9.4 4 12 4 10.9 ns tPLZ OE A or B 3.4 7 9.3 3.4 11.6 3.4 10.5 ns tPZH DIR A or B 2.8 7.8 10.7 2.8 14 2.8 13.1 ns tPZL DIR A or B 3.8 8.9 11.9 3.8 15.6 3.8 14.6 ns tPHZ DIR A or B 3.8 8.4 10.7 3.8 13.2 3.8 12.6 ns tPLZ DIR A or B 3.2 7.3 9.9 3.2 12.6 3.2 11.8 ns † These parameters are measured with the internal output state of the storage register opposite that of the bus input. |
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