74LS221 ON Semiconductor, 74LS221 Datasheet
74LS221
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74LS221 Summary of contents
Page 1
... Jitter-free operation is maintained over the full temperature and V ranges for greater than six decades of timing capacitance ( F), and greater than one decade of timing resistance (2.0 to 100 k for the SN74LS221). Pulse width is defined by the relationship: t (out 2.0 ...
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... Positive logic: Q high regardless of dc levels at A Positive logic inputs ext + C R/C ext FUNCTION TABLE (EACH MONOSTABLE) INPUTS OUTPUTS CLEAR ° ± ° *See operational notes — Pulse Trigger Modes TYPICAL MAXIMUM TYPE POWER OUTPUT PULSE DISSIPATION LENGTH SN74LS221 http://onsemi.com ...
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... This is not the case for the LS221. Also note that it is recommended to externally ground the LS123 C However, this cannot be done on the LS221. The SN74LS221 is a dual, monolithic, non-retriggerable, high-stability one shot. The output pulse width, t varied over 9 decades of timing by proper selection of the ...
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... I IL Input B Clear I Short Circuit Current (Note 1) OS Power Supply Current Quiescent Triggered Note 1: Not more than one output should be shorted at a time, nor for more than 1 second. SN74LS221 (unless otherwise specified) Limits Min Typ Max Unit 1.0 2 MIN CC 0.7 0.8 ...
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... W(out SETUP REQUIREMENTS ( Symbol Parameter Rate of Rise or Fall of Input Pulse dv/dt Input Pulse Width Clear-Inactive-State Setup Time s R External Timing Resistance ext C External Timing Capacitance ext Output Duty Cycle SN74LS221 = 25 C) Limits Min Typ Max Unit See Figure 120 150 ...
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... SN74LS221 AC WAVEFORMS t W(in) B INPUT 1 CLEAR t t PLH PHL Q OUTPUT t t PHL PLH Q OUTPUT A INPUT IS LOW. TRIGGER FROM B, THEN CLEAR — CONDITION 1 B INPUT 60 ns 1.3 V CLEAR Q OUTPUT A INPUT IS LOW. TRIGGER FROM B, THEN CLEAR — CONDITION 2 B INPUT 50 ns CLEAR TRIGGERED Q OUTPUT NOT TRIGGERED A INPUT IS LOW ...
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... 0.25 (0.010) M –A– –B– –T– SEATING PLANE 0.25 (0.010 SN74LS221 PACKAGE DIMENSIONS N SUFFIX PLASTIC PACKAGE CASE 648–08 ISSUE R L SEATING –T– PLANE SUFFIX PLASTIC SOIC PACKAGE CASE 751B–05 ISSUE 0.25 (0.010 http://onsemi.com ...
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... Nishi–Gotanda, Shinagawa–ku, Tokyo, Japan 141–8549 Phone: 81–3–5487–8345 Email: r14153@onsemi.com Fax Response Line: 303–675–2167 800–344–3810 Toll Free USA/Canada ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 8 SN74LS221/D ...