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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