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SN74ALS666DWE4 데이터시트(PDF) 5 Page - Texas Instruments |
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SN74ALS666DWE4 데이터시트(HTML) 5 Page - Texas Instruments |
5 / 12 page SN74ALS666, SN74ALS667 8-BIT D-TYPE TRANSPARENT READ-BACK LATCHES WITH 3-STATE OUTPUTS SDAS227A – JUNE 1984 – REVISED JANUARY 1995 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN74ALS666 SN74ALS667 UNIT MIN TYP† MAX VIK VCC = 4.5 V, II = – 18 mA – 1.2 V V All outputs VCC = 4.5 V to 5.5 V, IOH = – 0.4 mA VCC –2 V VOH Q or Q VCC = 4.5 V, IOH = – 2.6 mA 2.4 3.2 V Dinputs VCC =4 5V IOL = 4 mA 0.25 0.4 VOL D inputs VCC = 4.5 V IOL = 8 mA 0.35 0.5 V VOL QorQ VCC =4 5V IOL = 12 mA 0.25 0.4 V Q or Q VCC = 4.5 V IOL = 24 mA 0.35 0.5 IOZH Q or Q VCC = 5.5 V, VO = 2.7 V 20 µA IOZL Q or Q VCC = 5.5 V, VO = 0.4 V –20 µA II D inputs VCC =5 5V VI = 5.5 V 0.1 mA II All others VCC = 5.5 V VI = 7 V 0.1 mA IIH D inputs‡ VCC =5 5V VI =2 7V 20 µA IIH All others VCC = 5.5 V, VI = 2.7 V 20 µA I D inputs‡ VCC =5 5V VI =0 4V – 0.1 mA IIL All others VCC = 5.5 V, VI = 0.4 V – 0.1 mA IO§ VCC = 5.5 V, VO = 2.25 V –30 –112 mA V5 5 V Q outputs high 25 50 SN74ALS666 VCC = 5.5 V, OERB high Q outputs low 40 73 ICC OERB high Q outputs disabled 30 55 mA ICC V5 5 V Q outputs high 25 50 mA SN74ALS667 VCC = 5.5 V, OERB high Q outputs low 45 79 OERB high Q outputs disabled 30 60 † All typical values are at VCC = 5 V, TA = 25°C. ‡ For I/O ports (QA through QH), the parameters IIH and IIL include the off-state output current. § The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. |
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