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bft25_cnv


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                        DISCRETE SEMICONDUCTORS




  DATA SHEET




  BFT25
  NPN 2 GHz wideband transistor
Product specification                             November 1992
NXP Semiconductors                                                                                       Product specification


     NPN 2 GHz wideband transistor                                                                                         BFT25

DESCRIPTION                                  PINNING
NPN transistor in a plastic SOT23              PIN             DESCRIPTION
envelope.
                                                          Code: V1p
It is primarily intended for use in RF          1       base                         lfpage                         3
low power amplifiers, such as in
                                                2       emitter
pocket phones, paging systems, etc.
The transistor features low current             3       collector
consumption (100 A to 1 mA); due to
its high transition frequency, it also                                                             1                        2
has excellent wideband properties
                                                                                                   Top view             MSB003
and low noise up to high frequencies.


                                                                                                       Fig.1 SOT23.



QUICK REFERENCE DATA

     SYMBOL               PARAMETER                                   CONDITIONS                       TYP.      MAX.                UNIT
VCBO             collector-base voltage                open emitter                                             8                    V
VCEO             collector-emitter voltage             open base                                                5                    V
Ic               DC collector current                                                                           6.5                  mA
Ptot             total power dissipation               up to Ts = 167 C; note 1                                 30                   mW
fT               transition frequency                  IC = 1 mA; VCE = 1 V; f = 500 MHz;          2.3                               GHz
                                                       Tamb = 25 C
Cre              feedback capacitance                  IC = 1 mA; VCE = 1 V; f = 1 MHz;                         0.45                 pF
                                                       Tamb = 25 C
GUM              maximum unilateral power gain IC = 1 mA; VCE = 1 V; f = 500 MHz;                  18                                dB
                                               Tamb = 25 C
F                noise figure                          IC = 1 mA; VCE = 1 V; f = 500 MHz;          3.8                               dB
                                                       Tamb = 25 C


LIMITING VALUES
In accordance with the Absolute Maximum System (IEC 134).
     SYMBOL                PARAMETER                                  CONDITIONS                 MIN.         MAX.                   UNIT
VCBO             collector-base voltage                  open emitter                                     8                      V
VCEO             collector-emitter voltage               open base                                        5                      V
VEBO             emitter-base voltage                    open collector                                   2                      V
IC               DC collector current                                                                     6.5                    mA
ICM              peak collector current                  f  1 MHz                                         10                     mA
Ptot             total power dissipation                 up to Ts = 167 C; note 1                         30                     mW
Tstg             storage temperature                                                          65          150                    C
Tj               junction temperature                                                                     175                    C

Note
1. Ts is the temperature at the soldering point of the collector tab.


November 1992                                                     2
NXP Semiconductors                                                                                                                     Product specification


     NPN 2 GHz wideband transistor                                                                                                               BFT25

THERMAL RESISTANCE

 SYMBOL                                        PARAMETER                                            CONDITIONS                  THERMAL RESISTANCE
Rth j-s               thermal resistance from junction to                                   up to Ts = 167C; note 1                    260 K/W
                      soldering point
Note
1. Ts = is the temperature at the soldering point of the collector tab.


CHARACTERISTICS
Tj = 25 C unless otherwise specified.

 SYMBOL                            PARAMETER                                               CONDITIONS                    MIN.       TYP.   MAX.     UNIT
ICBO               collector cut-off current                                    IE = 0; VCB = 5 V                                          50      nA
hFE                DC current gain                                              IC = 10 A; VCE = 1 V                  20         30        
                                                                                IC = 1 mA; VCE = 1 V                  20         40        
fT                 transition frequency                                         IC = 1 mA; VCE = 1 V; f = 500 MHz     1.2        2.3               GHz
Cc                 collector capacitance                                        IE = ie = 0; VCB = 0.5 V; f = 1 MHz                        0.6     pF
Ce                 emitter capacitance                                          Ic = ic = 0; VEB = 0; f = 1 MHz                            0.5     pF
Cre                feedback capacitance                                         IC = 1 mA; VCE = 1 V; f = 1 MHz;                           0.45    pF
                                                                                Tamb = 25 C
GUM                maximum unilateral power gain IC = 1 mA; VCE = 1 V; f = 500 MHz;                                              18                dB
                   (note 1)                      Tamb = 25 C
                                                                                IC = 1 mA; VCE = 1 V; f = 800 MHz;               12                dB
                                                                                Tamb = 25 C
F                  noise figure                                                 IC = 0.1 mA; VCE = 1 V;                          5.5               dB
                                                                                f = 500 MHz; Tamb = 25 C
                                                                                IC = 1 mA; VCE = 1 V; f = 500 MHz;               3.8               dB
                                                                                Tamb = 25 C

Note
1. GUM is the maximum unilateral power gain, assuming S12 is zero and
                                                         2
                                           S 21
      G UM = 10 log --------------------------------------------------------- dB.
                                            2                             2
                                                                            -
                     1 



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