2N4427 STMICROELECTRONICS | Alldatasheet
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G7 7; SGS-THOMSON 2N4427 MICROELECTRONICS BFR98 VHF OSCILLATOR POWER AMPLIFIER
DESCRIPTION
The 2N4427 and BFR98 are silicon planar epitaxial NPN transistor in Jedec TO-39 metal case. They are designed for VHF class A, B, or C amplifier and os- cillator applications. TO-39 INTERNAL SCHEMATIC DIAGRAM Cc NPN | Ss ows E ABSOLUTE MAXIMUM RATINGS [Pro _| Total Power Dissipation at Tcase < 25 °C Storage and Junction Temperature January 1989 1/3 403
2N4427-BFR98 | THERMAL DATA : Thermal Resistance Junction-case Max ELECTRICAL CHARACTERISITCS (Tamp = 25 C unless otherwise specified) Symbol | __—-Parameter__— | Test Conditions | Min. | Typ. | Max.| unit | Iceo Collector Cutoff Current . (Ig = 0) Voce =12V 20 nA V(aryca0 Collector-base Breakdown Ic = 100 pA Vv Voltage (le = 0) Vceoisus)” | Collector-emitter Sustaining lo =5 mA 20 Vv Voltage (Ip = 0) VceR(sus)” | Collector-Emitter Sustaining Io =5 mA 40 Vv Voltage (Ree = 10 Q) Viaryeso | Emitter-Base Breakdown Voltage | le =100 pA 3.5 Vv (Ic = 0) Vce(saty” | Collector-Emitter Saturation I¢ =100 mA Ig =20 mA 0.5 Vv Voltage hee” DC Current Gain I¢ =100 mA Vee =5 V 10 200 Ic = 360 mA Vee =5 V 5 fr Transition Frequency Io =50 mA Vee = 15 V f = 200 MHz MHz Ccao Collector-base Capacitance le =0 Veg =12V f =1 MHz 4 pF Output Power Veco =12V P, = 100 mw f = 175 MHz Ww nt Collector Efficiency Veco =12 V Po =1W f =175 MHz 50 Yo * Pulsed : pulse duration = 300 us, duty cycle = 1% ** See test circuit. RF Output Power. Collector-base Capacitance. ~ 3947 o-mus ® [TTTTTTTT TTT ttt tit tt ceoof [TTT TTTTT TTT TTT io ty) oo CEE EEE Eee SeCL EEE ECE Cee ee reer rr Prrrrr erry rrr rrr rrr | rrr rrr rrr ry rrr ve efFLE PPT rrr er PPP rrr ry rrr PEEP T teetme TTT TTT Pray r TTT Try ry ry | TERRES R eee CTT RA Pi somwT TT TT TTT TT ATT Tyree we th ASE Tr eft Pierre “UTE SAT rrr | WEP e TS Pert PAA Sco ONSET YT) TTT SARS CRIP eee oe HANS SWE ‘ PINT TET rrr CCC Gem IS ISSCC TTIN TTT rrr rr rrr PPP rrr NENT PPP PSA eer LPP r yr ry eA NTT LPP eee ot oA 2et ET ee “CEP TE ETE iS NER PEP rr errr PPT rr rrr OAT PPP er rere rer rr TTTTrrr ry rrr rrr rrr CPT Pre rrrerryrr COCO eee eee COTTT Terre ry rr yy rrr) o 100 200 300 400 (MH ° 8 6 2% 32 Veal¥) = iy SGS-THOMSON ‘Tf wcroszctmomes 404
Test Circuit for Power Output Measurement (f = 175 MHz). C3) la 2, =50N 252502 u Oo G {> : aS 2 C4 C6 Ry t_} O12v $-3016/ C1,C2,C3,C4 = 3+30pF L1 = 2 turns 16 wire, 3/16” ID, 1/4" long C5 = 1000 pF L2 = ferrite choke, Z = 450 W C6 = 20kpF L3 = 2 turns 16 wire, 1/4” ID, 1/4" long Ri = 10W L4 = 4 turns 16 wire, 3/8” ID, 3/8" long oe eSeSsSEG|F'ScS-THOMSON ‘T7 micromactmomes 405 ee ce