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CD74FCT646 Datasheet(PDF) 6 Page - Texas Instruments |
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CD74FCT646 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 12 page CD74FCT646 BiCMOS OCTAL BUS TRANSCEIVER AND REGISTER WITH 3-STATE OUTPUTS SCBS735A – JULY 2000 – REVISED JULY 2000 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended operating temperature conditions (unless otherwise noted) (see Figure 2) MIN MAX UNIT fclock Clock frequency 85 MHz tw Pulse duration CLKBA or CLKAB high or low 6 ns tsu Setup time A before CLKAB ↑ or B before CLKBA↑ 4 ns th Hold time A after CLKAB ↑ or B after CLKBA↑ 2 ns switching characteristics over recommended operating temperature conditions (unless otherwise noted) (see Figure 2) PARAMETER FROM TO TA = 25°C MIN MAX UNIT PARAMETER (INPUT) (OUTPUT) TYP MIN MAX UNIT fmax 85 MHz CLKBA or CLKAB A or B 6.8 2 9 tpd A or B B or A 6.8 2 9 ns SBA or SAB† A or B 8.3 2 11 ten OE A or B 10.5 2 14 ns tdis OE A or B 6.8 2 9 ns † These parameters are measured with the internal output state of the storage register opposite that of the bus input. noise characteristics, VCC = 5 V, CL = 50 pF, TA = 25°C PARAMETER MIN TYP MAX UNIT VOL(P) Quiet output, maximum dynamic VOL 1 V VOH(V) Quiet output, minimum dynamic VOH 0.5 V VIH(D) High-level dynamic input voltage 2 V VIL(D) Low-level dynamic input voltage 0.8 V |
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