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SN74ALS521 데이터시트(PDF) 7 Page - Texas Instruments |
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SN74ALS521 데이터시트(HTML) 7 Page - Texas Instruments |
7 / 21 page SN54ALS520, SN74ALS518, SN74ALS520, SN74ALS521 8-BIT IDENTITY COMPARATORS SDAS224B – JUNE 1982 – REVISED NOVEMBER 1995 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN54ALS520 SN74ALS520 SN74ALS521 UNIT MIN TYP† MAX MIN TYP† MAX VIK VCC = 4.5 V, II = – 18 mA – 1.5 – 1.5 V VCC = 4.5 V to 5.5 V, IOH = – 0.4 mA VCC –2 VCC –2 VOH VCC =4 5V IOH = – 1 mA 2.4 3.3 V VCC = 4.5 V IOH = – 2.6 mA 2.4 3.2 VOL VCC =4 5V IOL = 12 mA 0.25 0.4 0.25 0.4 V VOL VCC = 4.5 V IOL = 24 mA 0.35 0.5 V II ′ALS520 Q inputs VCC =5 5V VI = 5.5 V 0.1 0.1 mA II All other inputs VCC = 5.5 V VI = 7 V 0.1 0.1 mA I ′ALS520 Q inputs VCC =5 5V VI =2 7V – 0.2 – 0.2 mA IIH All other inputs VCC = 5.5 V, VI = 2.7 V 20 20 µA IIL ′ALS520 Q inputs VCC =5 5V VI =0 4V – 0.6 – 0.6 mA IIL All other inputs VCC = 5.5 V, VI = 0.4 V – 0.1 – 0.1 mA IO‡ VCC = 5.5 V, VO = 2.25 V –20 –112 –30 –112 mA ICC ′ALS520 VCC =5 5V See Note 1 12 19 12 19 mA ICC SN74ALS521 VCC = 5.5 V, See Note 1 12 19 12 19 mA † All typical values are at VCC = 5 V, TA = 25°C. ‡ The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS. NOTE 1: ICC is measured with G grounded, and P and Q at 4.5 V. switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, RL = 500 Ω, TA = MIN to MAX§ UNIT PARAMETER (INPUT) (OUTPUT) SN54ALS520 SN74ALS520 SN74ALS521 UNIT MIN MAX MIN MAX tPLH PorQ PQ 3 19 3 12 ns tPHL P or Q P = Q 3 25 5 20 ns tPLH G P=Q 2 18 2 12 ns tPHL G P = Q 5 23 5 22 ns § For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. |
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