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SN74ABT843DBLE 데이터시트(PDF) 5 Page - Texas Instruments |
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SN74ABT843DBLE 데이터시트(HTML) 5 Page - Texas Instruments |
5 / 17 page SN54ABT843, SN74ABT843 9-BIT BUS-INTERFACE D-TYPE LATCHES WITH 3-STATE OUTPUTS SCBS197D – FEBRUARY 1991 – REVISED MAY 1997 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing requirements over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see Figures 1 and 2) VCC = 5 V, TA = 25°C SN54ABT843 SN74ABT843 UNIT MIN MAX MIN MAX MIN MAX CLR low 5.5 5.5 5.5 tw Pulse duration PRE low 4.5 4.5 4.5 ns LE low 3.3 3.3 3.4 Data before LE ↓ Low 2.5 2.5 2.5 t Setup time Data before LE ↓ High 3 3 3 ns tsu Setup time PRE inactive 1.6 1.6 1.6 ns CLR inactive 2 2 2 th Hold time data after LE ↓ High 1 1 1 ns th Hold time, data after LE ↓ Low 1.5† 2.3† 1.5† ns † This data sheet limit may vary among suppliers. switching characteristics over recommended ranges of supply voltage and operating free-air temperature, CL = 50 pF (unless otherwise noted) (see Figures 1 and 2) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 5 V, TA = 25°C SN54ABT843 SN74ABT843 UNIT (INPUT) (OUTPUT) MIN TYP MAX MIN MAX MIN MAX tPLH D Q 1.2† 3.8 5.2 1.2† 7.8 1.2† 6.7† ns tPHL D Q 1.5† 3.4 6.3 1.5† 7.3 1.5† 7.2 ns tPLH LE Q 1.7† 4.4 5.6 1.7† 8.3 1.7† 7.2† ns tPHL LE Q 1.9† 4.1 6.3 1.3† 7.2 1.9† 6.9 ns tPLH PRE Q 2.2 5 6.2 2.2 8.3 2.2 7.4 ns tPHL PRE Q 2.1† 4.1 6.5 2.1† 7.5 2.1† 7.2 ns tPLH CLR Q 2† 4.4 6.3 2† 7.6 2† 7.1 ns tPHL CLR Q 1.9† 4.5 6.8 1.9† 8.1 1.9† 8 ns tPZH OE Q 1 3.4 4.5† 1 6.4 1 5.7† ns tPZL OE Q 2 4.3 5.7† 2 6.6 2 6.5 ns tPHZ OE Q 2.4† 4.9 6.2 2.4† 7.3 2.4† 6.8 ns tPLZ OE Q 1.5† 4.2 6.3 1.5† 7 1.5† 5.9† ns † This data sheet limit may vary among suppliers. |
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