1997 Sep 04

2

Philips Semiconductors

Product specification

N-channel junction FETs

BF861A; BF861B; BF861C

FEATURES

• High transfer admittance

• Low input capacitance

• Low feedback capacitance

• Low noise.

APPLICATIONS

• Preamplifiers for AM tuners in car radios.

DESCRIPTION

N-channel symmetrical junction field effect transistors in a

SOT23 package.

PINNING - SOT23

PIN

SYMBOL

DESCRIPTION

1

s

source

2

d

drain

3

g

gate

CAUTION

The device is supplied in an antistatic package. The

gate-source input must be protected against static

discharge during transport or handling.

Fig.1 Simplified outline and symbol.

Marking codes:

BF861A: M33.

BF861B: M34.

BF861C: M35.

handbook, halfpage

s

d

g

21

3

MAM036

Top view

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

MIN.

MAX.

UNIT

drain-source voltage (DC)

−

25

V

drain current

BF861A

2

6.5

mA

BF861B

6

15

mA

BF861C

12

25

mA

total power dissipation

−

250

mW

forward transfer admittance

BF861A

12

20

mS

BF861B

16

25

mS

BF861C

20

30

mS

input capacitance

f = 1 MHz

−

10

pF

reverse transfer capacitance

f = 1 MHz

−

2.7

pF