1996 Oct 08

2

Philips Semiconductors

Product specification

NPN wideband cascode transistor

BFC505

FEATURES

• Small size

• High power gain at low bias current and high

frequencies

• High reverse isolation

• Low noise figure

• Gold metallization ensures excellent reliability

APPLICATIONS

• Low voltage, low current, low noise and high gain

amplifiers

• Oscillator buffer amplifiers

• Wideband voltage-to-current converters.

DESCRIPTION

Cascode amplifier with two discrete dies in a surface

mount, 5-pin SOT353 (S-mini) package. The amplifier is

primarily intended for low power RF communications

equipment, such as pagers and has a very low feedback

capacitance resulting in high isolation.

PINNING - SOT353

PIN

SYMBOL

DESCRIPTION

base 2

emitter 1

base 1

collector 1/emitter 2

collector 2

Fig.1 Simplified outline and symbol.

handbook, halfpage

3

1

4

5

2

Top view

MAM212

c2

b2

c1/e2

b1

e1

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

−−

10

fF

maximum isolation

f = 900 MHz

60

−−

dB

MSG

maximum stable power gain

−

22

−

dB

F

noise figure

f = 500 MHz;

−

1.1

1.4

dB

f = 900 MHz;

−

1.8

2.1

dB

thermal resistance from

junction to soldering point

single loaded

−−

230

K/W

double loaded

−−

115

K/W

s

⁄

2