2N3906 Low Power Bipolar Transistors Electrical Characteristics (Ta = 25°C unless otherwise specified)DescriptionSymbolTest ConditionT2N3906UnitSmall Signal Characteristics Transistors Frequency ft IC = 10mA, VCE = 20V, f = 100MHz >250 MHz Output Capacitance Cob VCB = 5V, IE = 0, f = 100kHz <4.5 pF Input Capacitance Cib VBE = 0.5V, IC = 0, f = 100kHz <10 Small Signal Current Gain hfe 100 - 400 - Input Impedance hie All f = 1kHz 2.0 - 12 kΩ IC = 1mA, VCE = 10V Output Admittance hoe 3.0 - 60 µΩ Voltage Feedback Ratio hre 0.1 - 10 x 10-4 IC = 100µA, VCE = 5V Noise Figure NF Rs = 1kΩ <40 dB f = 10Hz to 15.7kHz Switching Time Delay Time td VCC = 3V, VBE = 0.5V <35 Rise Time tr IC = 10mA, IB1 = 1mA nS Storage time ts VCC = 3V, IC = 10mA <225 Fall Time tf IB1 = IB2 = 1mA <75 Part Number TablePackagePart Number TO-92 2N3906 Page <3> 12/05/08 V1.1