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| B-6 01/99 2N3957, 2N3958 N-Channel Dual Silicon Junction Field-Effect Transistor Low and Medium Frequency Differential Amplifiers High Input Impedance Amplifiers Absolute maximum ratings at TA = 25C Reverse Gate Source & Reverse Gate Drain Voltage Gate Current Total Device Power Dissipation (each side) @ 85C Case Temperature (both sides) Power Derating (both sides) - 50 V 50 mA 250 mW 500 mW 4.3 mW/C At 25C free air temperature: Static Electrical Characteristics Gate Source Breakdown Voltage Gate Reverse Current Gate Operating Current Gate Source Voltage Gate Source Cutoff Voltage Gate Source Forward Voltage Drain Saturation Current (Pulsed) Dynamic Electrical Characteristics Common Source Forward Transconductance Common Source Output Conductance Common Source Input Capacitance Drain Gate Capacitance Common Source Reverse Transfer Capacitance Noise Figure Differential Gate Current Saturation Drain Current Ratio Differential Gate Source Voltage Differential Gate Source Voltage with Temperature Transconductance Ratio gfs gos Ciss Cdgo Crss NF | IG1 - IG2 | IDSS1 / IDSS2 | VGS1 - VGS2 | VGS1- VGS2 T 2N3957 Min V(BR)GSS IGSS IG VGS VGS(OFF) VGS(F) IDSS 0.5 - 50 - 100 - 500 - 50 - 250 - 4.2 - 0.5 -1 -4 - 4.5 2 5 Max 2N3958 Min - 50 - 100 - 500 - 50 - 250 - 4.2 - 0.5 -1 0.5 -4 - 4.5 2 5 Max Unit V pA nA pA nA V V V V mA Process NJ16 Test Conditions IG = - 1 A, VDS = OV VGS = - 30V, VDS = OV VGS = - 30V, VDS = OV VDS = 20V, ID = 200 A VDS = 20V, ID = 200 A VDS = 20V, ID = 50 A VDS = 20V, ID = 200 A VDS = 20V, ID = 1 nA VDS = O, IG = 1 mA VDS = 20V, VGS = OV TA = 125C TA = 125C 1000 3000 1000 3000 1000 35 4 1.5 1.2 0.5 10 0.9 1 20 6 7.5 0.9 1 0.85 0.85 1000 35 4 1.5 1.2 0.5 10 1 25 8 10 1 S S S pF pF pF dB nA mV mV mV VDS = 20V, VGS = OV VDS = 20V, VGS = OV VDS = 20V, VGS = OV VDS = 20V, VGS = OV VDS = 10V, IS = OA VDS = 20V, VGS = OV VDS = 20V, VGS = OV RG = 10 M VDS = 20V, ID = 200 A VDS = 20V, VGS = OV VDS = 20V, ID = 200 A VDS = 20V, ID = 200 A VDS = 20V, ID = 200 A VDS = 20V, ID = 200 A f = 1 kHz f = 200 MHz f = 1 kHz f = 1 MHz f = 1 MHz f = 1 MHz f = 100 Hz TA = 125C TA = 25C to - 55C TA = 25C to 125C gfs1 / gfs2 f = 1 kHz TO71 Package See Section G for Outline Dimensions 1000 N. Shiloh Road, Garland, TX 75042 (972) 487-1287 FAX (972) 276-3375 Pin Configuration 1 Source, 2 Drain, 3 Gate, 5 Source, 6 Drain, 7 Gate www.interfet.com |
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