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                                                                           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 videooutput
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
                                                                              Value
  Symbol                                 Parameter                                              Unit
                                                                    BF 257 BF258 BF25 9
   V CBO       Collector-base Voltage (I E = 0)                      160       250        300    V
   V CEO       Collector-emitter Voltage (I B = 0)                   160       250        300    V
   V E BO      Emitter-base Voltage (I C = 0)                                      5             V
     IC        Collector Current                                               100              mA
    I CM       Collector Peak Current                                          200              mA
    Pt o t     Total Power Dissipation at T amb  50 



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