GERMANIUM MESA PNP AF 2398 UHF PREAMPLIFIER The AF 239S is a germanium mesa PNP transistor in a Jedec TO-72 metal case. It is particularly designed as preamplifier, mixer and oscillator up to 900 MHz. ABSOLUTE MAXIMUM RATINGS Voces Veeo Veso Collector-emitter voltage (Vg_ = 0) Collector-emitter voltage (I, = 0) Emitter-base voltage (I. = 0) Collector current Total power dissipation at T,,, = 45C at Toa. = 66C Storage temperature Junction temperature MECHANICAL DATA Shield lead connected to case 11 5.2m 12,70 0.45% C-60n 0.442003 ~20 -15 ~0.3 -10 mA 60 mW 60 mW <<< ~30 to 75 C 90 C Dimensions in mm TO-72 6/68 AF 239S THERMAL DATA R R th j-case th j-amb Thermal resistance junction-case Thermal resistance junction-ambient max 400 max 750 C/W C/W ELECTRICAL CHARACTERISTICS (T case = 29C unless otherwise specified) Parameter Test conditions Min. Typ. Max. | Unit lees Collector cutoff current (Vge = 0) Vee = -20V -8]) vA leEo Collector cutoff current (I, = 0) Vee = -15V -500| nA lego Emitter cutoff current (I, = 0) Veg = -0.3V -100] LA Vee Base-emitter voltage Ik =-2mMA Vee = -10V ~350 mV lk =-5mMA Ve =-5V -400 mV Nee DC current gain Ik =-2mA Ve = -10V] 10 _ lo =-5mA Vee = -10V 30 f, Transition frequency lo =-2mA Vee = -10V f = 100 MHz 780 MHz -C.. Reverse capacitance le =-2mA Vee = -10V f = 450 kHz 0.2 pF NF Noise figure lb =-1ImMA Va = -10V R, = 602 f = 800 MHz 5| dB Goo Power gain Ik =-2mMA Vee = -10V RL =2kQ R, = 600. f = 800 MHz 12.5 15 dB 12