MSC81325M RF & MICROWAVE TRANSISTORS AVIONICS APPLICATIONS .. .. .. . PRELIMINARY DATA REFRACTORY/GOLD METALLIZATION EMITTER BALLASTED RUGGEDIZED VSWR ∞:1 INPUT/OUTPUT MATCHING OVERLAY GEOMETRY METAL/CERAMIC HERMETIC PACKAGE POUT = 325 W MIN. WITH 6.7 dB GAIN .400 x .400 2NLFL (S042) hermetically sealed ORDER CODE MSC81325M BRANDING 81325M PIN CONNECTION DESCRIPTION The MSC81325M device is a high power pulsed transistor specifically designed for DME/TACAN avionics applications. This device is capable of withstanding an infinite load VSWR at any phase angle under full rated conditions. Low RF thermal resistance and semiautomatic bonding techniques ensure high reliability and product consistency. The MSC81325M is housed in the industry-standard AMPAC™ metal/ceramic hermetic package with internal input/output matching structures. 1. Collector 2. Base 3. Emitter 4. Base ABSOLUTE MAXIMUM RATINGS (T case = 25 ° C) Symbol PDISS IC VCC TJ TSTG Parameter Value Unit 880 W Device Current* 24 A Collector-Supply Voltage* 55 V Junction Temperature (Pulsed RF Operation) 250 °C − 65 to +200 °C 0.17 °C/W Power Dissipation* (TC ≤ 100˚C) Storage Temperature THERMAL DATA RTH(j-c) Junction-Case Thermal Resistance* *Applies only to rated RF amplifier operation October 1992 1/3 MSC81325M ELECTRICAL SPECIFICATIONS (T case = 25 ° C) STATIC Symbol Value Test Conditions Min. Typ. Max. Unit BVCBO IC = 10mA IE = 0mA 65 — — V BVEBO IE = 1mA IC = 0mA 3.5 — — V BVCER IC = 25mA RBE = 10Ω 65 — — V ICES VBE = 0V VCE = 50V — — 25 mA hFE VCE = 5V IC = 1A 15 — 120 — DYNAMIC Symbol Min. Typ. Max. Unit POUT ηc f = 1025 — 1150 MHz PIN = 70 W VCC = 50 V 325 360 — W f = 1025 — 1150 MHz PIN = 70 W VCC = 50 V 40 41 — % GP f = 1025 — 1150 MHz PIN = 70 W VCC = 50 V 6.7 7.1 — dB Note: Pulse Width Duty Cycle = = 10 µ Sec 1% TEST CIRCUIT All dimensions are in inches. Ref.: Dwg. No. C127471 2/3 Value Test Conditions MSC81325M PACKAGE MECHANICAL DATA Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectonics. © 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A 3/3