Details, datasheet, quote on part number: MRF338
PartMRF338
CategoryDiscrete
DescriptionBroadband RF Power Transistor NPN Silicon
CompanyMotorola Semiconductor Products
DatasheetDownload MRF338 datasheet
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Features, Applications

Designed primarily for wideband large­signal output and driver amplifier stages in the to 512 MHz frequency range. Specified 28 Volt, 470 MHz Characteristics Output Power = 80 Watts Minimum Gain 7.3 dB Efficiency = 50% (Min) Built­In Matching Network for Broadband Operation 100% Tested for Load Mismatch at all Phase Angles with 30:1 VSWR Gold Metallization System for High Reliability Applications

Rating Collector­Emitter Voltage Collector­Base Voltage Emitter­Base Voltage Collector Current Continuous Collector Current Peak Total Device Dissipation 25°C (1) Derate above 25°C Storage Temperature Range Symbol VCEO VCBO VEBO IC PD Tstg Value to +150 Unit Vdc Adc Watts W/°C °C

Characteristic Thermal Resistance, Junction to Case (2) Symbol RJC Max 0.7 Unit °C/W

Collector­Emitter Breakdown Voltage (IC = 80 mAdc, = 0) Collector­Emitter Breakdown Voltage (IC = 80 mAdc, VBE = 0) Emitter­Base Breakdown Voltage (IE = 8 mAdc, = 0) V(BR)CEO V(BR)CES V(BR)EBO 60 4 Vdc

(1) This device is designed for RF operation. The total device dissipation rating applies only when the device is operated an RF amplifier. (2) Thermal Resistance is determined under specified RF operating conditions by infrared measurement techniques.

ELECTRICAL CHARACTERISTICS continued (TC = 25°C unless otherwise noted)

Collector­Base Breakdown Voltage (IC = 80 mAdc, = 0) Collector Cutoff Current (VCB = 30 Vdc, = 0) V(BR)CBO ICBO 60 5 Vdc mAdc

Common­Emitter Amplifier Power Gain (VCC = 28 Vdc, Pout = 470 MHz) Collector Efficiency (VCC = 28 Vdc, Pout = 470 MHz) Load Mismatch (VCC = 28 Vdc, Pout = 470 MHz, VSWR = 30:1, All Phase Angles at Frequency of Test) GPE No Degradation in Output Power dB %

Ferroxcube ­ 20 pF, Johanson (JMC 5501) 25 pF, 100 V, Underwood 100 pF, 100 V, Underwood 0.1 µF, Erie Redcap 680 pF, Feedthru 1.0 µF, Tantalum 0.15 µH, Molded Choke 5 Turns #20 AWG, 0.185 ID, Close Wound

3 Turns #18 AWG, 0.185 ID, Close Wound 4 Turns #18 AWG, 0.185 ID, Close Wound Ferroxcube , 2.0 Watt Carbon 2.5 L, Microstrip Lin 0.289 L, Microstrip Line 0.55 L, Microstrip Line 0.325 L, Microstrip Line Glass Teflon, = 2.56

= 470 MHz Pout , OUTPUT POWER (WATTS) 80 512 MHz Pout , OUTPUT POWER (WATTS) 60 100 Pin 14 W
Figure 2. Output Power versus Input Power
Figure 3. Output Power versus Supply Voltage

 

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