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SN74ALS688N Datasheet(PDF) 4 Page - Texas Instruments |
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SN74ALS688N Datasheet(HTML) 4 Page - Texas Instruments |
4 / 16 page SN54ALS688, SN74ALS688 8-BIT IDENTITY COMPARATORS SDAS228A – JUNE 1982 – REVISED JANUARY 1995 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 recommended operating conditions SN54ALS688 SN74ALS688 UNIT MIN NOM MAX MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V VIH High-level input voltage 2 2 V VIL Low-level input voltage 0.7 0.8 V IOH High-level output current –1 – 2.6 mA IOL Low-level output current 12 24 mA TA Operating free-air temperature –55 125 0 70 °C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS SN54ALS688 SN74ALS688 UNIT PARAMETER TEST CONDITIONS MIN TYP† MAX MIN TYP† MAX UNIT 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 3.3 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 VCC = 5.5 V, VI = 7 V 0.1 0.1 mA IIH VCC = 5.5 V, VI = 2.7 V 20 20 µA IIL 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 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, 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 (INPUT) (OUTPUT) SN54ALS688 SN74ALS688 MIN MAX MIN MAX tPLH P PQ 3 16 3 12 ns tPHL P P = Q 5 25 5 20 ns tPLH Q PQ 3 16 3 12 ns tPHL Q P = Q 5 25 5 20 ns tPLH G P=Q 3 15 3 12 ns tPHL G P = Q 5 25 5 22 ns § For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. |
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