2N1639 Datasheet and Replacement

   Type Designator: 2N1639
   Material of Transistor: Ge
   Polarity: PNP
   Maximum Collector Power Dissipation (Pc): 0.08 W
   Maximum Collector-Base Voltage |Vcb|: 34 V
   Maximum Emitter-Base Voltage |Veb|: 1 V
   Maximum Collector Current |Ic max|: 0.01 A
   Max. Operating Junction Temperature (Tj): 85 °C
   Transition Frequency (ft): 20 MHz
   Collector Capacitance (Cc): 4 pF
   Forward Current Transfer Ratio (hFE), MIN: 75
   Noise Figure, dB: -
   Package: TO1
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