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SN74ALS996DW 데이터시트(PDF) 4 Page - Texas Instruments |
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SN74ALS996DW 데이터시트(HTML) 4 Page - Texas Instruments |
4 / 17 page SN54ALS996, SN74ALS996 8BIT DTYPE EDGETRIGGERED READBACK LATCHES SDAS098B − OCTOBER 1984 − REVISED JANUARY 1995 2−4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 recommended operating conditions SN54ALS996 SN74ALS996 UNIT MIN NOM MAX MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V All inputs 2 VIH High-level input voltage All inputs except OE, RD 2 V VIH High-level input voltage OE, RD 2.2 V VIL Low-level input voltage 0.8 0.8 V IOH High-level output current Q −1 − 2.6 mA IOH High-level output current D − 0.4 − 0.4 mA Q 12 24 IOL Low-level output current Q 48† mA IOL Low-level output current D 8 8 mA fclock Clock frequency 0 35 0 35 MHZ CLR low 10 10 tw Pulse duration CLK low 14.5 14.5 ns tw Pulse duration CLK high 14.5 14.5 ns Data before CLK ↑ 15 15 tsu Setup time EN low before CLK ↑ 10 10 ns tsu Setup time CLK high before EN ↑‡ 15 15 ns CLR high (inactive) before CLK ↑ 10 10 Data after CLK ↑ 1 0 th Hold time EN low after CLK ↑ 5 5 ns th Hold time RD high after CLK ↑§ 5 5 ns TA Operating free-air temperature −55 125 0 70 °C † Applies only to the -1 version and only if VCC is maintained between 4.75 V and 5.25 V ‡ This setup time ensures that EN will not false clock the data register. § This hold time ensures that there will be no conflict on the input data bus. |
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