Infineon Technologies N/A BC 849 B NPN Case type SOT 23 I(C) BC849B Data Sheet
Product codes
BC849B
2011-09-09
4
BC847...-BC850...
Electrical Characteristics at T
A
= 25°C, unless otherwise specified
Parameter
Symbol
Values
Unit
min.
typ.
max.
AC Characteristics
Transition frequency
I
Transition frequency
I
C
= 10 mA, V
CE
= 5 V, f = 100 MHz
f
T
-
250
-
MHz
Collector-base capacitance
V
V
CB
= 10 V, f = 1 MHz
C
cb
-
0.95
-
pF
Emitter-base capacitance
V
V
EB
= 0.5 V, f = 1 MHz
C
eb
-
9
-
Short-circuit input impedance
I
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.A
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.B
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.C
h
11e
-
-
-
-
-
2.7
4.5
8.7
4.5
8.7
-
-
-
-
-
k
Ω
Open-circuit reverse voltage transf. ratio
I
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.A
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.B
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.C
h
12e
-
-
-
-
-
1.5
2
3
3
-
-
-
-
-
10
-4
Short-circuit forward current transf. ratio
I
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.A
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.B
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.C
h
21e
-
-
-
-
-
200
330
600
330
600
-
-
-
-
-
Open-circuit output admittance
I
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.A
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.B
I
C
= 2 mA, V
CE
= 5 V, f = 1 kHz, h
FE
-grp.C
h
22e
-
-
-
-
-
18
30
60
30
60
-
-
-
-
-
µS
Noise figure
I
I
C
= 200 µA, V
CE
= 5 V, f = 1 kHz,
∆ f = 200 Hz, R
S
= 2 k
Ω, BC849..., BC850...
F
-
1.2
4
dB
Equivalent noise voltage
I
I
C
= 200 µA, V
CE
= 5 V, R
S
= 2 k
Ω,
f = 10 ... 50 Hz , BC850...
V
n
-
-
0.135 µV