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SN74LS221NSRG4 Datasheet(PDF) 7 Page - Texas Instruments |
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SN74LS221NSRG4 Datasheet(HTML) 7 Page - Texas Instruments |
7 / 27 page SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT TRIGGER INPUTS SDLS213B − DECEMBER 1983 − REVISED NOVEMBER 2004 7 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics VCC = 5 V, RL = 400 Ω, TA = 25_C (see Figures 1 and 2) PARAMETER FROM TO TEST CONDITIONS SN54221 SN74221 UNIT PARAMETER FROM (INPUT) TO (OUTPUT) TEST CONDITIONS MIN TYP MAX MIN TYP MAX UNIT tPLH A Q 45 70 45 70 tPLH B Q Cext = 80 pF, Rext = 2 kΩ 35 55 35 55 ns tPHL A Q Cext = 80 pF, Rext = 2 kΩ 50 80 50 80 ns tPHL B Q 40 65 40 65 tPHL CLR Q Cext = 80 pF, Rext = 2 kΩ 27 27 ns tPLH CLR Q Cext = 80 pF, Rext = 2 kΩ 40 40 ns Cext = 80 pF, Rext = 2 kΩ 70 110 150 70 110 150 tw A or B Q or Q Cext = 0, Rext = 2 kΩ 17 30 50 17 30 50 ns tw A or B Q or Q Cext = 100 pF, Rext = 10 kΩ 650 700 750 650 700 750 ns Cext = 1 µF, Rext = 10 kΩ 6.5* 7 7.5* 6.5 7 7.5 ms ∗ On products compliant to MIL-PRF-38535, this parameter is not production tested. recommended operating conditions (see Note 4) SN54LS221 SN74LS221 UNIT MIN NOM MAX MIN NOM MAX UNIT VCC Supply voltage 4.5 5 5.5 4.75 5 5.25 V IOH High-level output current −400 −400 µA IOL Low-level output current 4 8 mA ∆v/∆t Rise or fall of input pulse rate B input 1* 1 V/s ∆v/∆t Rise or fall of input pulse rate A input 1* 1 V/ µs TA Operating free-air temperature −55 125 0 70 °C ∗ On products compliant to MIL-PRF-38535, this parameter is not production tested. NOTE 4: All unused inputs of the device must be held at VCC or GND to ensure proper device operation. Refer to the TI application report, Implications of Slow or Floating CMOS Inputs, literature number SCBA004. |
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