NTE2643 Silicon NPN Transistor, VHF/UHF Low Noise Amp (Surface Mount) Features: D Low Noise Figure, High Gain D NF = 1.1dB, |S21e|2 = 13dB (f = 1GHz) Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Collector–Base Voltage, VCBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V Collector–Emitter Voltage, VCEO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12V Emitter–Base Voltage, VEBO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3V Collector Current, IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80mA Base Current, IB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40mA Collector Power Dissipation, PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100mW Operating Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +125°C Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Collector Cutoff Current ICBO VCB = 10V, IE = 0 – – 1 µA Emitter Cutoff Current IEBO VEB = 1V, IC = 0 – – 1 µA DC Current Gain hFE VCE = 10V, IC = 20mA 80 – 240 Output Capacitance Cob VCB = 10V, IE = 0, f = 1MHz, Note 1 – 1.1 1.6 pF Reverse Transfer Capacitance Cre – 0.65 1.05 pF Transition Frequency Insertion Gain fT |S21e|2 VCE = 10V, IC = 20mA 5 7 – GHz VCE = 10V, IC = 20mA, f = 500MHz – 18 – dB 9.5 13.0 – dB VCE = 10V, IC = 5mA, f = 500MHz – 1 – dB VCE = 10V, IC = 5mA, f = 1GHz – 1.1 2.0 dB VCE = 10V, IC = 20mA, f = 1GHz Noise Figure NF Note 1. Cre is measured by 3 terminal method with capacitance bridge. .008 (0.2) C E .083 (2.1) E B .051 (1.3) .079 (2.0) .049(1.25) .037 (0.95) .004 (0.1)