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74AC138B Datasheet(PDF) 5 Page - STMicroelectronics |
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74AC138B Datasheet(HTML) 5 Page - STMicroelectronics |
5 / 10 page 74AC138 5/10 AC ELECTRICAL CHARACTERISTICS (CL = 50 pF, RL = 500 Ω, Input tr = tf = 3ns) (*) Voltage range is 3.3V ± 0.3V (**) Voltage range is 5.0V ± 0.5V 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/n (per circuit) TEST CIRCUIT CL = 50pF or equivalent (includes jig and probe capacitance) RL = R1 = 500Ω or equivalent RT = ZOUT of pulse generator (typically 50Ω) 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. tPLH tPHL Propagation Delay Time A, B, C to Y 3.3(*) 1.5 5.5 10.5 1.5 14.0 1.5 15.4 ns 5.0(**) 1.5 4.5 9.0 1.5 10.0 1.5 11.0 tPLH tPHL Propagation Delay Time G1 to Y 3.3(*) 1.5 6.0 10.5 1.5 14.0 1.5 15.4 ns 5.0(**) 1.5 4.5 11.0 1.5 10.0 1.5 11.0 tPLH tPHL Propagation Delay Time G2A or G2B to Y 3.3(*) 1.5 5.5 10.5 1.5 12.7 1.5 14.0 ns 5.0(**) 1.5 4.5 9.0 1.5 10.0 1.5 10.0 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 4 pF CPD Power Dissipation Capacitance (note 1) 5.0 fIN = 10MHz 60 pF |
Número de pieza similar - 74AC138B |
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Descripción similar - 74AC138B |
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