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M74HC221 Datasheet(PDF) 7 Page - STMicroelectronics |
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M74HC221 Datasheet(HTML) 7 Page - STMicroelectronics |
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7 / 14 page ![]() M74HC221 7/14 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, Input tr = tf = 6ns) CAPACITIVE CHARACTERISTICS 1) CPD is defined as the value of the IC’s internal equivalent capacitance which is calculated from the operating current consumption without load. (Refer to Test Circuit). Average operating current can be obtained by the following equation. ICC(opr) = CPD x VCC x fIN + ICC’ Duty/100 + Ic/2(per monostable) (Icc’ : Active Supply current) (Duty : %) Symbol Parameter Test Condition Value Unit VCC (V) TA = 25°C -40 to 85°C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. tTLH tTHL Output Transition Time 2.0 30 75 95 110 ns 4.5 8 151922 6.0 7 131619 tPLH tPHL Propagation Delay Time (A, B - Q, Q) 2.0 102 210 265 315 ns 4.5 30 42 53 63 6.0 24 36 45 54 tPLH tPHL Propagation Delay Time(CLR TRIGGER - Q, Q) 2.0 102 235 295 355 ns 4.5 30 47 59 71 6.0 24 40 50 60 tPLH tPHL Propagation Delay Time (CLR - Q, Q) 2.0 67 160 200 240 ns 4.5 20 32 40 48 6.0 16 27 34 41 tWOUT Output Pulse Width 2.0 Cx = 100 pF Rx = 10K Ω 1.5 µs 4.5 1.3 6.0 1.2 2.0 Cx = 0.1 µF Rx = 100K Ω 7.0 ms 4.5 6.9 6.0 6.9 ∆t WOUT Output Pulse Width Error Between Circuits in Same Package ±1 % tW(H) tW(L) Minimum Pulse Width 2.0 75 95 110 ns 4.5 15 19 22 6.0 13 16 20 tW(L) Minimum Pulse Width 2.0 75 95 110 ns 4.5 15 19 22 6.0 13 16 20 Symbol Parameter Test Condition Value Unit VCC (V) TA = 25°C -40 to 85°C -55 to 125°C Min. Typ. Max. Min. Max. Min. Max. CIN Input Capacitance 5.0 5 101010 pF CPD Power Dissipation Capacitance (note 1) 5.0 174 pF |
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