140 COMMERCE DRIVE MONTGOMERYVILLE, PA 18936-1013 PHONE: (215) 631-9840 FAX: (215) 631-9855 2N6255 RF & MICROWAVE DISCRETE LOW POWER TRANSISTORS Features • • • • Silicon NPN, To-39 packaged VHF Transistor 3.0 Watt Power Output @ 175 MHz Power Gain, GPE = 7.8 dB Efficiency = 50% 1. Emitter 2. Base 3. Collector TO-39 DESCRIPTION: Silicon NPN transistor, designed for 12.5 volt VHF equipment. Applications include amplifier; pre-driver, driver, and output stages. Also suitable for oscillator and frequency-multiplier functions. ABSOLUTE MAXIMUM RATINGS (Tcase = 25°C) Symbol VCEO Parameter Collector-Emitter Value 18 Unit Vdc VCBO VEBO Collector-Base Voltage 36 Vdc Emitter-Base Voltage 4.0 Vdc IC Collector Current 1 A 5.0 28.5 Watts mW/ ºC Thermal Data P D Total Device Dissipation @ TA = 25ºC Derate above 25ºC MSC1306.PDF 10-25-99 2N6255 ELECTRICAL SPECIFICATIONS (Tcase = 25°C) STATIC (off) Symbol BVCES BVCEO BVEBO ICES ICBO Test Conditions Value Min. Typ. Max. Unit Collector-Emitter Breakdown Voltage (IC = 5.0 mAdc, VBE =0Vdc) 36 - - Vdc Collector-Emitter Breakdown Voltage (IC=10 mAdc, IB=0) 18 - - Vdc Emitter-Base Breakdown Voltage (IE = 1.0 mAdc, IC = 0) 4.0 - Collector Cutoff Current (VCE = 15 Vdc, VBE = 0 Vdc) - - 5.0 mA Emitter Cutoff Current (VCB = 15 Vdc, IE = 0) - - .25 mA 5.0 - - - 20 pF Vdc (on) HFE DC Current Gain (IC = 250 mAdc, VCE = 5.0 Vdc) DYNAMIC Symbol COB Test Conditions Output Capacitance (VCB = 12.5Vdc, f = 1.0 MHz Value - 15 FUNCTIONAL Symbol GPE ηC Test Conditions Power Gain Collector Efficiency MSC1306.PDF 10-25-99 Test Circuit-Figure 1 Pout = 3.0 W, VCC = 12.5Vdc f = 175 MHz Test Circuit-Figure 1 Pout = 3.0 W, VCC = 12.5Vdc f = 175 MHz Value Min. Typ. Max. Unit 7.8 - - dB 50 - - % 2N6255 12.5 Vdc C6 C5 RFC2 L2 C4 POUT (RL=50 OHMS) C1 L1 PIN (RS=50 OHMS) RFC1 C3 C2 Bead Figure 1 - 175 MHz RF AMPLIFIER CIRCUIT FOR GPE, AND EFFICIENCY SPECIFICATIONS. C1,3: 2.0-50 pF ARCO 461 ELEMENCO C5: 1000 pF FEED THRU L1: 1 TURN #18 AWG ¼” I.D. RFC2: 0.15 uH MOLDED CHOKE C2,4: 5.0-80 pF ARCO 462 ELEMENCO C6: 5.0 uF L2: 2 1/2 TURNS #18 AWG ¼” I.D BEAD: FERROXCUBE 56-570-65/3B RFC1: 0.15 uH MOLDED CHOKE WITH BEAD ON GROUND LEG MSC1306.PDF 10-25-99 2N6255 MSC1306.PDF 10-25-99