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SN74ALS845-1NT 数据表(PDF) 3 Page - Texas Instruments |
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SN74ALS845-1NT 数据表(HTML) 3 Page - Texas Instruments |
3 / 9 page SN74ALS845 8BIT BUSINTERFACE DTYPE LATCH WITH 3STATE OUTPUTS SDAS233A − DECEMBER 1983 − REVISED JANUARY 1995 3 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Voltage applied to a disabled 3-state output 5.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA 0 °C to 70°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range −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 MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 V VIH High-level input voltage 2 V VIL Low-level input voltage 0.8 V IOH High-level output current − 2.6 mA IOL Low-level output current 24 mA IOL Low-level output current 48‡ mA tw Pulse duration CLR or PRE low 35 ns tw Pulse duration LE high 20 ns tsu Setup time, data before LE ↓ 10 ns th Hold time, data after LE ↓ 5 ns TA Operating free-air temperature 0 70 °C ‡ Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP§ MAX UNIT VIK VCC = 4.5 V, II = − 18 mA − 1.2 V VOH VCC = 4.5 V to 5.5 V, IOH = − 0.4 mA VCC −2 V VOH VCC = 4.5 V, IOH = − 2.6 mA 2.4 3.2 V IOL = 12 mA 0.25 0.4 VOL VCC = 4.5 V IOL = 24 mA 0.35 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 20 µA IOZL VCC = 5.5 V, VO = 0.4 V −20 µA II VCC = 5.5 V, VI = 7 V 0.1 mA IIH VCC = 5.5 V, VI = 2.7 V 20 µA IIL VCC = 5.5 V, VI = 0.4 V − 0.1 mA IO¶ VCC = 5.5 V, VO = 2.25 V −30 −112 mA Outputs high 21 36 ICC VCC = 5.5 V Outputs low 41 67 mA ICC VCC = 5.5 V Outputs disabled 25 42 mA ‡ Applies only to the -1 version and only if VCC is between 4.75 V and 5.25 V § 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. |
类似零件编号 - SN74ALS845-1NT |
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类似说明 - SN74ALS845-1NT |
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