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SN74AS874DW Datasheet(PDF) 4 Page - Texas Instruments |
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SN74AS874DW Datasheet(HTML) 4 Page - Texas Instruments |
4 / 9 page SN54ALS874B, SN74ALS874B, SN74ALS876A SN74AS874, SN74AS876 DUAL 4-BIT D-TYPE EDGE-TRIGGERED FLIP-FLOPS SDAS061C – APRIL 1982 – REVISED JANUARY 1995 4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 recommended operating conditions SN54ALS874B SN74ALS874B SN74ALS876A UNIT MIN NOM MAX MIN NOM MAX 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 fclock Clock frequency 0 25 0 30 MHz PRE or CLR low 15 10 tw Pulse duration CLK high 20 16.5 ns CLK low 20 16.5 t Set p time before CLK ↑ Data 15 15 ns tsu Setup time before CLK ↑ PRE or CLR inactive 15 10 ns th Hold time, data after CLK ↑ 4 0 ns 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 SN54ALS874B SN74ALS874B SN74ALS876A UNIT MIN TYP† MAX MIN TYP† MAX VIK VCC = 4.5 V, II = – 18 mA – 1.2 – 1.2 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 IOZH VCC = 5.5 V, VO = 2.7 V 20 20 µA IOZL VCC = 5.5 V, VO = 0.4 V –20 –20 µA 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 – 0.2 – 0.2 mA IO‡ VCC = 5.5 V, VO = 2.25 V –20 –112 –30 –112 mA Outputs high 14 21 14 21 ′ALS874B VCC = 5.5 V Outputs low 19 30 19 30 ICC Outputs disabled 20 32 20 32 mA ICC Outputs high 14 21 mA SN74ALS876A VCC = 5.5 V Outputs low 18 29 Outputs disabled 20 31 † 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. |
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