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SN74LS221DE4 数据表(PDF) 9 Page - Texas Instruments |
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SN74LS221DE4 数据表(HTML) 9 Page - Texas Instruments |
9 / 27 page SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT TRIGGER INPUTS SDLS213B − DECEMBER 1983 − REVISED NOVEMBER 2004 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 switching characteristics VCC = 5 V, RL = 2 kΩ, TA = 25_C (see Figures 1 and 2) PARAMETER FROM TO TEST CONDITIONS SN54LS221 SN74LS221 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 35 55 35 55 ns tPLH CLR Q Cext = 80 pF, Rext = 2 kΩ 44 65 44 65 ns Cext = 80 pF, Rext = 2 kΩ 70 120 150 70 120 150 tw A or B Q or Q Cext = 0, Rext = 2 kΩ 20 47 70 20 47 70 ns tw A or B Q or Q Cext = 100 pF, Rext = 10 kΩ 670 740 810 670 740 810 ns Cext = 1 µF, Rext = 10 kΩ 6* 6.9 7.5* 6 6.9 7.5 ms ∗ On products compliant to MIL-PRF-38535, this parameter is not production tested. |
类似零件编号 - SN74LS221DE4 |
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类似说明 - SN74LS221DE4 |
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