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SN74AS169A 데이터시트(PDF) 4 Page - Texas Instruments |
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SN74AS169A 데이터시트(HTML) 4 Page - Texas Instruments |
4 / 9 page SN54ALS169B, SN54AS169A, SN74ALS169B, SN74AS169A SYNCHRONOUS 4-BIT UP/DOWN BINARY COUNTERS SDAS125B – MARCH 1984 – REVISED DECEMBER 1994 2–4 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 typical load, count, and inhibit sequences The following sequence is illustrated below: 1. Load (preset) to binary 13 2. Count up to 14, 15 (maximum), 0, 1, and 2 3. Inhibit 4. Count down to 1, 0 (minimum), 15, 14, and 13 Data Inputs Data Outputs LOAD A B C D CLK U/D ENP and ENT RCO QA QB QC QD Load Count Up Inhibit 13 14 15 0 0 12 Count Down 2 21 13 15 14 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: SN54ALS169B – 55 °C to 125°C . . . . . . . . . . . . . . . . . . . . . . . . . . . SN74ALS169B 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. |
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