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SN74ALS621A-1 数据表(PDF) 5 Page - Texas Instruments |
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SN74ALS621A-1 数据表(HTML) 5 Page - Texas Instruments |
5 / 19 page SN74ALS620A, SN74ALS621A, SN74ALS623A, SN74AS623 OCTAL BUS TRANSCEIVERS SDAS226A – DECEMBER 1982 – REVISED JANUARY 1995 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics (see Figure 1) PARAMETER FROM (INPUT) TO (OUTPUT) VCC = 4.5 V to 5.5 V, CL = 50 pF, R1 = 500 Ω, R2 = 500 Ω, TA = MIN to MAX† UNIT SN74ALS620A SN74ALS623A MIN MAX MIN MAX tPLH A B 2 10 2 13 ns tPHL A B 2 10 3 11 ns tPLH B A 2 10 2 13 ns tPHL B A 2 10 3 11 ns tPZH OEBA A 3 17 5 22 ns tPZL OEBA A 5 25 5 22 ns tPHZ OEBA A 2 12 2 16 ns tPLZ OEBA A 3 18 2 19 ns tPZH OEAB B 3 18 5 22 ns tPZL OEAB B 5 25 5 22 ns tPHZ OEAB B 2 12 2 16 ns tPLZ OEAB B 3 18 2 19 ns † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage, VCC 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage, VI: All inputs and I/O ports 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Operating free-air temperature range, TA: SN74ALS621A 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 SN74ALS621A UNIT 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 VOH High-level output voltage 5.5 V IOL Low level output current 24 mA IOL Low-level output current 48§ mA 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 |
类似零件编号 - SN74ALS621A-1 |
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类似说明 - SN74ALS621A-1 |
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