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SN74ALS191AD Datasheet(PDF) 5 Page - Texas Instruments |
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SN74ALS191AD Datasheet(HTML) 5 Page - Texas Instruments |
5 / 18 page SN54ALS191A, SN74ALS191A SYNCHRONOUS 4BIT UP/DOWN BINARY COUNTERS SDAS210C − DECEMBER 1982 − REVISED JULY 1996 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 POST OFFICE BOX 1443 • HOUSTON, TEXAS 77251−1443 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage, VCC 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage, VI 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA: SN54ALS191A −55 °C to 125°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN74ALS191A 0 °C to 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg −65 °C to 150°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . † Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. recommended operating conditions SN54ALS191A SN74ALS191A 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 − 0.4 − 0.4 mA IOL Low-level output current 4 8 mA fclock Clock frequency 0 20 0 30 MHz tw Pulse duration CLK high or low 20 16.5 ns tw Pulse duration LOAD low 25 20 ns Data before LOAD ↑ 25 20 tsu Setup time CTEN before CLK ↑ 45 20 ns tsu Setup time D/U before CLK ↑ 30 20 ns LOAD inactive before CLK ↑ 20 20 Data after LOAD ↑ 5 5 th Hold time CTEN after CLK ↑ 0 0 ns D/U after CLK ↑ 0 0 ns TA Operating free-air temperature −55 125 0 70 °C |
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