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SD8250 Datasheet(PDF) 1 Page - STMicroelectronics |
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SD8250 Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 5 page July 19, 1994 AVIONICS APPLICATIONS RF & MICROWAVE TRANSISTORS .400 x .400 2LFL (S036) hermetically sealed . REFRACTORY/GOLD METALLIZATION . EMITTER SITE BALLASTED . 5:1 VSWR CAPABILITY @ 1.75 dB RF OVERDRIVE . LOW THERMAL RESISTANCE . INPUT/OUTPUT MATCHING . OVERLAY GEOMETRY . METAL/CERAMIC HERMETIC PACKAGE . POUT = 250 W MIN. WITH 8.0 dB GAIN DESCRIPTION The SD8250 is a high power Class C transistor specifically designed for TACAN/DME pulsed out- put and driver applications. This device is designed for operation under mod- erate pulse width and duty cycle pulse conditions and is capable of withstanding 5:1 output VSWR at rated RF overdrive. Low RF thermal resistance and computerized au- tomatic wire bonding techniques ensure high re- liability and product consistency. The SD8250 is supplied in the AMPAC ™ Hermetic Metal/Ceramic package with internal Input/Output matching structures. PIN CONNECTION BRANDING STAN250A ORDER CODE SD8250 ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C) Symbol Parameter Value Uni t PDISS Power Dissipation* (TC ≤ 90°C) 575 W IC Device Current* 20 A VCC Collector-Supply Voltage* 55 V TJ Junction Temperature (Pulsed RF Operation) 250 °C TSTG Storage Temperature − 65 to +200 °C RTH(j-c) Junction-Case Thermal Resistance (1) 0.28 °C/W *Applies only to rated RF amplifier operation (1) Infra-Red Scan of Hot Spot Junction Temperature at Rated RF Operating Conditions SD8250 1. Collector 3. Emitter 2. Base 4. Base THERMAL DATA 1/5 |
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