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U74HCT640L-R20-R Datasheet(PDF) 4 Page - Unisonic Technologies |
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U74HCT640L-R20-R Datasheet(HTML) 4 Page - Unisonic Technologies |
4 / 6 page U74HCT640 CMOS IC UNISONICTECHNOLOGIESCO.,LTD 4 of 6 www.unisonic.com.tw QW-R502-684.B SWITCHING CHARACTERISTICS (TA =25°C) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Propagation delay from A to B or B to A tPD VCC=4.5V, CL=50pF, RL=1kΩ 14 21 ns VCC=5.5V, CL=50pF, RL=1kΩ 12 18 Enable times from OE to A or B tEN VCC=4.5V, CL=50pF, RL=1kΩ 27 35 ns VCC=5.5V, CL=50pF, RL=1kΩ 24 32 Disable times from OE to A or B tDIS VCC=4.5V, CL=50pF, RL=1kΩ 20 30 ns VCC=5.5V, CL=50pF, RL=1kΩ 18 26 Output rise or fall time tT VCC=4.5V, CL=50pF, RL=1kΩ 9 12 ns VCC=5.5V, CL=50pF, RL=1kΩ 8 11 SWITCHING CHARACTERISTICS (TA =25°C) PARAMETER SYMBOL TEST CONDITIONS MIN TYP MAX UNIT Propagation delay from A to B or B to A tPD VCC=4.5V, CL=150pF, RL=1kΩ 17 27 ns VCC=5.5V, CL=150pF, RL=1kΩ 15 24 Enable times from OE to A or B tEN VCC=4.5V, CL=150pF, RL=1kΩ 31 45 ns VCC=5.5V, CL=150pF, RL=1kΩ 28 41 Output rise or fall time tT VCC=4.5V, CL=150pF, RL=1kΩ 17 42 ns VCC=5.5V, CL=150pF, RL=1kΩ 14 38 OPERATING CHARACTERISTICS (TA =25°C) PARAMETER SYMBOL TEST CONDITIONS TYP UNIT Power dissipation capacitance CPD No load 40 pF |
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