.zSem.i-Conawito'i , fi ne. TELEPHONE: (973) 376-2922 (212)227-6005 FAX: (973) 376-8960 20 STERN AVE. SPRINGFIELD, NEW JERSEY 07081 U.SA BF257 BF258-BF259 HIGH VOLTAGE VIDEO AMPLIFIERS DESCRIPTION The BF257, BF258 and BF259 are silicon planar epitaxial NPN transistors in Jedec TO-39 metal case. They are particularly designed for video output stages in CTV and MTV sets, class A audio output stages and drivers for horizontal deflection circuits. TO-39 INTERNAL SCHEMATIC DIAGRAM ABSOLUTE MAXIMUM RATINGS Symbol Value Parameter Unit BF257 BF258 BF259 VCBO Collector-base Voltage (IE =0) 160 250 300 VCEO Collector-emitter Voltage (IB = 0) 160 250 300 VEBO Emitter-base Voltage (Ic = 0) Ic I CM 5 V V V Collector Current 100 mA Collector Peak Current 200 mA 5 W - 55 to 200 C 1C Plot Total Power Dissipation at Tamb < 50 'C Tstg Storage Temperature Tj Junction Temperature Qualify Semi-Conductors 200 BF257-BF258-BF259 THERMAL DATA Rth j-case °th j-amb Thermal Resistance Junction-case Thermal Resistance Junction-ambient 30 175 Max Max "CM/ •CIW ELECTRICAL CHARACTERISTICS (Tamb = 25 °C unless otherwise specified) Parameter Symbol ICBO V(BR) CBO V(BR)CEO* V(BR) EBO VCE (sat)* Min. Typ. Max. Unit 50 50 50 nA nA nA forBF257 for BF258 for BF259 VCB = 100V V CB = 200 V VCB = 250 V Collector-base Breakdown Voltage (IE=0) l c =100|jA for BF257 forBF258 for BF259 160 250 300 V V V Collector-emitter Breakdown Voltage (lB = 0) lc = 10mA for BF257 forBF258 for BF259 160 250 300 V V V 5 V Emittter-base Breakdown Voltage dc=0) Collector-emitter Saturation Voltage IE = 100uA Ic =30 mA IB =6 mA DC Current Gain lc=30mA VCE = 10V fy Transition Frequency lc = 15mA VCE = 10V Cre Reverse Capacitance lc=0 f = 1 MHz V CE = 3 0 V h F £* * Test Conditions Collector Cutoff Current (IE = 0) Pulsed : pulse duration = 300 us, duty cycle 1 %. DC Current Gain. «. hFE BO at 02 Ic(mA) 1 V 25 90 MHz 3 PF BF257-BF258-BF259 TO39 MECHANICAL DATA mm inch DIM. MIN. A TYP. MIN. MAX. TYP. MAX. 0.500 12.7 B 0.49 0.019 D 6.6 0.260 E 8.5 0.334 F 9.4 0.370 G 5.08 0.200 H 1.2 0.047 1 0.9 0.035 L 45° (typ.)