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SN74LS224AN3 데이터시트(PDF) 5 Page - Texas Instruments |
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SN74LS224AN3 데이터시트(HTML) 5 Page - Texas Instruments |
5 / 13 page SN54LS224A, SN74LS224A 16 × 4 SYNCHRONOUS FIRST-IN, FIRST-OUT MEMORIES WITH 3-STATE OUTPUTS SDLS023E – JANUARY 1991 – REVISED APRIL 2003 5 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 timing diagram Invalid W1 W2 W1 W2 W15 W16 Invalid Word 1 Word 2 Word 1 Word 2 CLR LDCK IR UNCK D0–D3 OR Q0–Q3 Load Two Words Unload Two Words Load Until Full Unload Initialize absolute maximum ratings over operating free-air temperature range (unless otherwise noted)† Supply voltage range, VCC (see Note 1) –0.5 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage range, VI –0.5 V to 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Off-state output voltage range, VO –0.5 V to 5.5 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Package thermal impedance, θJA: N package (see Note 2) 67 °C/W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N package (see Note 3) 88 °C/W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 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. NOTES: 1. All voltage values are with respect to GND. 2. The package thermal impedance is calculated in accordance with JESD 51-7. 3. The package thermal impedance is calculated in accordance with JESD 51-3. |
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