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BCY58
BCY59

LOW NOISE AUDIO AMPLIFIERS

DESCRIPTION
The BCY58 and BCY59 are silicon planar epitaxial
NPN transistors in Jedec TO-18 metal case.
They are intended for use in audio input stages,
driver stages and low-noise input stages. The com-
plementary PNP types are respectively the BCY78
and BCY79.

TO-18

INTERNAL SCHEMATIC DIAGRAM

ABSOLUTE MAXIMUM RATINGS
Value
Symbol Parameter Unit
BCY58 BCY59
V CES Collector-emitter Voltage (V BE = 0) 32 45 V
V CEO Collector-emitter Voltage (I B = 0) 32 45 V
V EBO Emitter-base Voltage (I C = 0) 7 V
IC Collector Current 200 mA
IB Base Current 50 mA
Pt o t Total Power Dissipation at T amb 25