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SN74HC646 Datasheet(PDF) 8 Page - Texas Instruments |
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SN74HC646 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 10 page SN54HC646, SN74HC646 OCTAL BUS TRANSCEIVERS AND REGISTERS WITH 3-STATE OUTPUTS SCLS150B – DECEMBER 1982 – REVISED MAY 1997 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics over recommended operating free-air temperature range, CL = 150 pF (unless otherwise noted) (see Figure 2) PARAMETER FROM TO VCC TA = 25°C SN54HC646 SN74HC646 UNIT PARAMETER (INPUT) (OUTPUT) VCC MIN TYP MAX MIN MAX MIN MAX UNIT 2 V 90 265 400 330 CLKBA or CLKAB A or B 4.5 V 24 53 80 66 6 V 20 46 68 57 2 V 70 220 335 280 tpd A or B B or A 4.5 V 20 44 67 56 ns 6 V 15 38 57 49 † 2 V 80 275 415 345 SBA or SAB† A or B 4.5 V 24 55 83 69 6 V 20 47 70 60 2 V 113 330 500 410 OE A or B 4.5 V 33 66 100 82 t 6 V 27 57 85 71 ns ten 2 V 113 330 500 410 ns DIR A or B 4.5 V 33 66 100 82 6 V 27 57 85 71 2 V 45 210 315 265 tt Any 4.5 V 17 42 63 53 ns 6 V 13 36 53 43 † These parameters are measured with the internal output state of the storage register opposite that of the bus input. operating characteristics, TA = 25°C PARAMETER TEST CONDITIONS TYP UNIT Cpd Power dissipation capacitance No load 50 pF PRODUCT PREVIEW information concerns products in the formative or design phase of development. Characteristic data and other specifications are design goals. Texas Instruments reserves the right to change or discontinue these products without notice. |
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