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SN74ALS990DWR Datasheet(PDF) 2 Page - Texas Instruments |
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SN74ALS990DWR Datasheet(HTML) 2 Page - Texas Instruments |
2 / 14 page SN74ALS990 8-BIT D-TYPE TRANSPARENT READ-BACK LATCH SDAS027B – APRIL 1984 – REVISED JANUARY 1995 2 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 logic diagram (positive logic) 1D C1 To Seven Other Channels 1 11 2 19 OERB LE 1D 1Q timing diagram Data Bus LE OERB Q tsu th tpd tdis Input Data Read Back Input Data tpd tsu† ten † This setup time ensures that the read-back circuit will not create a conflict on the input data bus. absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡ Supply voltage, VCC 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Input voltage, VI (OERB and LE) 7 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Voltage applied to D inputs 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. |
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