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SN74ALS869DW Datasheet(PDF) 12 Page - Texas Instruments |
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SN74ALS869DW Datasheet(HTML) 12 Page - Texas Instruments |
12 / 17 page SN54AS867, SN54AS869 SN74ALS867A, SN74ALS869, SN74AS867, SN74AS869 SYNCHRONOUS 8-BIT UP/DOWN COUNTERS SDAS115C – DECEMBER 1982 – REVISED JANUARY 1995 12 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 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: SN54AS867 – 55 °C to 125°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SN74AS867 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 SN54AS867 SN74AS867 UNIT MIN NOM MAX MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 4.5 5 5.5 V VIH High-level input voltage 2 2 V VIL Low-level input voltage 0.8 0.8 V IOH High-level output current –2 –2 mA IOL Low-level output current 20 20 mA fclock* Clock frequency 0 40 0 50 MHz tw(clock)* Pulse duration, CLK high or low 12.5 10 ns tw(clear)* Pulse duration of clear pulse, S0 and S1 low 12.5 10 ns Data inputs A – H 5 4 ENP or ENT 9 8 t * Set p time before CLK ↑ S0 low and S1 high (load) 11 10 ns tsu* Setup time before CLK ↑ S0 and S1 low (clear) 11 10 ns S0 high and S1 low (count down) 42 40 S0 and S1 high (count up) 42 40 th* Hold time after CLK ↑ Data inputs A – H 0 0 ns tskew* Skew time between S0 and S1 (maximum to avoid inadvertent clear) 8 7 ns TA Operating free-air temperature –55 125 0 70 °C * On products compliant to MIL-STD-883, Class B, this parameter is based on characterization data but is not production tested. |
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