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SN74ALS842 Fiches technique(PDF) 9 Page - Texas Instruments |
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SN74ALS842 Fiches technique(HTML) 9 Page - Texas Instruments |
9 / 11 page SN54AS841, SN54AS842, SN74AS841, SN54AS842 10-BIT BUS INTERFACE D-TYPE LATCHES WITH 3-STATE OUTPUTS SDAS059B – D2910, DECEMBER 1983 – REVISED MAY 1986 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 9 recommended operating conditions SN54AS841 SN54AS842 SN74AS841 SN74AS842 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 0.8 0.8 V IOH High-level output current –24 –24 mA IOL Low-level output current 32 48 mA tw Pulse duration, C high 5 4 ns tsu Setup time, data before C ↓ 3.5 2.5 ns th Hold time,, data after C ↓ 3.5 2.5 ns TA Operating free-air temperature –55 125 0 70 °C electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) SN54AS841 SN74AS841 PARAMETER TEST CONDITIONS SN54AS842 SN74AS842 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 = – 2 mA VCC –2 VCC –2 VOH VCC = 4.5 V, IOH = – 15 mA 2.4 3.2 2.4 3.2 V VCC = 4.5 V, IOH = – 24 mA 2 2 VOL VCC = 4.5 V, IOL = 32 mA 0.25 0.5 V VOL VCC = 4.5 V, IOL = 48 mA 0.35 0.5 V IOZH VCC = 5.5 V, VO= 2. 7 V 50 50 µA IOZL VCC = 5.5 V, VO = 0.4 V –50 –50 µA II VCC = 5.5 V, VI = 7 V 0.1 0.1 mA IIH VCC = 5.5 V, VO = 2.7 V 20 20 µA IIL VCC = 5.5 V, VI = 0 .4 V – 0.5 – 0.5 mA IO‡ VCC = 5.5 V, VO = 2.25 V –30 –112 –30 –112 mA Outputs high 36 60 36 60 ’AS841 Outputs low 58 94 58 94 ICC VCC =5 5V Outputs disabled 56 92 56 92 mA ICC VCC = 5.5 V Outputs high 38 62 38 62 mA ’AS842 Outputs low 60 97 60 97 Outputs disabled 58 95 58 95 † 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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