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                                                                                   MMBTA42

                                                             Small signal NPN transistor

Features
   Miniature SOT-23 plastic package for surface
   mounting circuits
   Tape and reel packaging
   The PNP complementary type is MMBTA92

Applications
   Video amplifier circuits (rgb cathode current
   control)
                                                                          SOT-23
   Telephone wireline interface (hook switches,
   dialer circuits)

Description                                            Figure 1.   Intenal schematic diagram

The device is manufactured in Epitaxial Planar
technology.




Table 1.     Device summary
   Order code          Marking                     Package                      Packaging

   MMBTA42               A42                       SOT-23                      tape and reel




November 2007                                      Rev 3                                             1/8
                                                                                               www.st.com   8
Electrical characteristics                                                           MMBTA42


1           Electrical characteristics

            (Tcase = 25

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