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MM74HC221ASJ Datasheet(PDF) 4 Page - Fairchild Semiconductor |
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MM74HC221ASJ Datasheet(HTML) 4 Page - Fairchild Semiconductor |
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4 / 9 page  www.fairchildsemi.com 4 AC Electrical Characteristics VCC = 5V, TA = 25°C, CL = 15 pF, tr = tf = 6 ns AC Electrical Characteristics CL = 50 pF, tr = tf = 6 ns (unless otherwise specified) Note 5: CPD determines the no load dynamic power consumption, PD = CPD VCC 2f + I CC VCC, and the no load dynamic current consumption, IS = CPD VCCf + ICC. Symbol Parameter Conditions Typ Guaranteed Units Limit tPLH Maximum Trigger Propagation 22 36 ns Delay A, B or Clear to Q tPHL Maximum Trigger Propagation 25 42 ns Delay A, B or Clear to Q tPHL Maximum Propagation Delay Clear to Q 20 31 ns tPLH Maximum Propagation Delay Clear to Q 22 33 ns tW Minimum Pulse Width A, B or Clear 14 26 ns tREM Minimum Clear Removal Time 0ns tWQ(MIN) Minimum Output Pulse Width CEXT = 28 pF 400 ns REXT = 2 kΩ tWQ Output Pulse Width CEXT = 1000 pF 10 µs REXT = 10 kΩ Symbol Parameter Conditions VCC TA = 25°CTA = −40 to 85°CTA = −55 to 125°C Units Typ Guaranteed Limits tPLH Maximum Trigger Propagation 2.0V 77 169 194 210 ns Delay A, B or Clear to Q 4.5V 26 42 51 57 ns 6.0V 21 32 39 44 ns tPHL Maximum Trigger Propagation 2.0V 88 197 229 250 ns Delay A, B or Clear to Q 4.5V 29 48 60 67 ns 6.0V 24 38 46 51 ns tPHL Maximum Propagation 2.0V 54 114 132 143 ns Delay Clear to Q 4.5V 23 34 41 45 ns 6.0V 19 28 33 36 ns tPLH Maximum Propagation 2.0V 56 116 135 147 ns Delay Clear to Q 4.5V 25 36 42 46 ns 6.0V 20 29 34 37 ns tW Minimum Pulse Width 2.0V 57 123 144 157 ns A, B, Clear 4.5V 17 30 37 42 ns 6.0V 12 21 27 30 ns tREM Minimum Clear 2.0V 0 0 0 ns Removal Time 4.5V 0 0 0 ns 6.0V 0 0 0 ns tTLH, tTHL Maximum Output 2.0V 30 75 95 110 ns Rise and Fall Time 4.5V 8 15 19 22 ns 6.0V 7 13 16 19 ns tWQ(MIN) Minimum Output CEXT = 28 pF 2.0V 1.5 µs Pulse Width REXT = 2 kΩ 4.5V 450 ns REXT = 6 kΩ (VCC = 2V) 6.0V 380 ns tWQ Output Pulse Width CEXT = 0.1 µF Min 5.0V 1 0.9 0.86 0.85 ms REXT = 10 kΩ Max 5.0V 1 1.1 1.14 1.15 ms CPD Power Dissipation 87 pF Capacitance (Note 5) CIN Maximum Input 12 20 20 20 pF Capacitance (Pins 7 & 15) CIN Maximum Input 6 10 10 10 pF Capacitance (other inputs) |
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