1898

SD1898 RF & MICROWAVE TRANSISTORS 1.6 GHz SATCOM APPLICATIONS . . . . . . 1.65 GHz 28 VOLTS EFFICIENCY 40% MIN. CLASS C OPERATION COMMON BASE P OUT = 32 W MIN. WITH 9 dB GAIN .400 SQ. 2LFL (M186) epoxy sealed ORDER CODE SD1898 BRANDING 1898 PIN CONNECTION DESCRIPTION The SD1898 is a 28 V Class C silicon NPN transistor designed for INMARSAT and other 1.65 GHz SATCOM applications. A gold metallized emitterballasted die geometry is employed providing high gain and efficiency while ensuring long term reliability and ruggedness under severe operating conditions. SD1898 is packaged in a cost-effective epoxy sealed housing. ABSOLUTE MAXIMUM RATINGS (T case = 25 ° C) Symbol Parameter Value Unit 1. Collector 2. Base 3. Emitter 4. Base VCBO VCEO VEBO IC PDISS TJ T STG Collector-Base Voltage Collector-Emitter Voltage Emitter-Base Voltage Device Current Power Dissipation Junction Temperature Storage Temperature 45 15 3.5 7.8 87.5 +200 − 65 to +150 V V V A W °C °C THERMAL DATA RTH(j-c) November 1992 Junction-Case Thermal Resistance 2.0 °C/W 1/4 SD1898 ELECTRICAL SPECIFICATIONS (T case = 25 ° C) STATIC Symbol Test Conditions Value Min. Typ. Max. Unit BVCBO BVCEO BVEBO hFE DYNAMIC Symbol IC = 10mA IC = 10mA IE = 10mA VCE = 5V IE = 0mA IB = 0mA IC = 0mA IC = 2A 45 12 3.5 15 — — — — — — — 150 V V V — Test Conditions Value Min . Typ. Max. Unit POUT GP ηc f = 1.65 GHz f = 1.65 GHz f = 1.65 GHz PIN = 4.0 W PIN = 4.0 W PIN = 4.0 W VCE = 28 V VCE = 28 V VCE = 28 V 32 ...