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SN74LS221N3 Datasheet(PDF) 6 Page - Texas Instruments |
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SN74LS221N3 Datasheet(HTML) 6 Page - Texas Instruments |
6 / 27 page SN54221, SN54LS221, SN74221, SN74LS221 DUAL MONOSTABLE MULTIVIBRATORS WITH SCHMITT TRIGGER INPUTS SDLS213B − DECEMBER 1983 − REVISED NOVEMBER 2004 6 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 electrical characteristics over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS† SN54221 SN74221 UNIT PARAMETER TEST CONDITIONS† MIN TYP‡ MAX MIN TYP‡ MAX UNIT VT+ Positive-going threshold voltage, B input VCC = MIN 1.55 2* 1.55 2 V VT− Negative-going threshold voltage, B input VCC = MIN 0.8* 1.35 0.8 1.35 V VIK VCC = MIN, II = −12 mA −1.5 −1.5 V VOH VCC = MIN, IOH = −800 µA 2.4 3.4 2.4 3.4 V VOL VCC = MIN, IOL = 16 mA 0.2 0.4 0.2 0.4 V II VCC = MAX, VI = 5.5 V 1 1 mA IIH A input VCC = MAX, VI = 2.4 V 40 40 A IIH CLR, B input VCC = MAX, VI = 2.4 V 80 80 µA IIL A input VCC = MAX, VI = 0.4 V −1.6 −1.6 mA IIL CLR, B input VCC = MAX, VI = 0.4 V −3.2 −3.2 mA IOS§ VCC = MAX −20 −55 −18 −55 mA ICC Quiescent VCC = MAX 26 50* 26 50 mA ICC Triggered VCC = MAX 46 80* 46 80 mA ∗ On products compliant to MIL-PRF-38535, this parameter is not production tested. † For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. ‡ All typical values are at VCC = 5 V, TA = 25°C. § Not more than one output should be shorted at a time, and the duration of the short circuit should not exceed one second. timing requirements over recommended ranges of supply voltage and operating free-air temperature SN54221 SN74221 UNIT MIN MAX MIN MAX UNIT tw Pulse duration A or B input 50 50 ns tw Pulse duration CLR 20 20 ns tsu Setup time, inactive-state¶ CLR 15 15 ns Rext External timing resistance 1.4* 30* 1.4 40 k Ω Cext External timing capacitance 0* 1000* 0 1000 µF Output duty cycle Rext = 2 kΩ 67% 67% Output duty cycle Rext = MAX Rext 90% 90% ∗ On products compliant to MIL-PRF-38535, this parameter is not production tested. ¶ Inactive-state setup time also is referred to as recovery time. |
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