Details, datasheet, quote on part number: MRF641
CategoryDiscrete => Transistors => Bipolar => RF
DescriptionRF Power Transistor NPN Silicon
CompanyMotorola Semiconductor Products
DatasheetDownload MRF641 datasheet
Cross ref.Similar parts: PD55015
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Features, Applications

. designed for 12.5 Volt UHF large­signal amplifier applications in industrial and commercial FM equipment operating to 512 MHz. Specified 12.5 Volt, 470 MHz Characteristics Output Power = 15 Watts Minimum Gain 7.8 dB Efficiency = 55% Characterized with Series Equivalent Large­Signal Impedance Parameters Built­In Matching Network for Broadband Operation Tested for Load Mismatch Stress at all Phase Angles with 20:1 VSWR @ 16­Volt High Line and Overdrive Circuit board photomaster available upon request by contacting RF Tactical Marketing in Phoenix, AZ.

Rating Collector­Emitter Voltage Collector­Base Voltage Emitter­Base Voltage Collector Current Continuous Total Device Dissipation = 25°C 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 Symbol RJC Max 4.0 Unit °C/W

Collector­Emitter Breakdown Voltage (IC = 20 mAdc, = 0) Collector­Emitter Breakdown Voltage (IC = 20 mAdc, VBE = 0) Emitter­Base Breakdown Voltage (IE = 5.0 mAdc, = 0) Collector Cutoff Current (VCE = 15 Vdc, VBE = 25°C) V(BR)CEO V(BR)CES V(BR)EBO ICES Vdc mAdc (continued)

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

Common­Emitter Amplifier Power Gain (VCC = 12.5 Vdc, Pout = 470 MHz) Collector Efficiency (VCC = 12.5 Vdc, Pout = 470 MHz) Output Mismatch Stress (VCC = 16 Vdc, Pin = 470 MHz, VSWR = 20:1, All Phase Angles) Gpe No Degradation in Output Power dB %

PARTS x 0.187 Microstrip x 0.187 Microstrip Z3 Capacitor Block (Base) Z4 Collector Block x 0.187 Microstrip x 0.187 Microstrip x 0.187 Microstrip Dotted Area Capacitor Assembly 10 pF Johanson 24 pF Chip Caps 100 mils ATC 22 pF Chip Caps 100 mils ATC 220 pF Chip Cap 100 mils ATC 1.0 µF Tantalum 35 Vdc 680 pF Feedthrough Allen­Bradley 200 pF UNELCO C8 0.1 µF, 50 V Erie Red Cap 200 104B Ferrite Choke L1 4 Turns 0.2 Dia. #16 AWG L2 9 Turns 0.15 Dia. #16 AWG Bead Ferroxcube 56­590­65­35EB

NOTES *C5, C6, are mounted as close to the capacitor *assembly as possible. C3, C4 are mounted in the capacitor assembly. Board 62.5 mil Glass Teflon, = 2.55.

Figure 2. Power Output versus Power Input
Figure 4. Power Output versus Supply Voltage

ZOL* = Conjugate of the load impedance into which the device output operates at a given power, , and frequency.

Figure 6. Series Equivalent Input­Output Impedance MOTOROLA RF DEVICE DATA MRF641 3


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