Datasheet

2011-09-19
4
BC857...-BC860...
Electrical Characteristics at T
A
= 25°C, unless otherwise specified
Parameter
Symbol Values Unit
min. typ. max.
AC Characteristics
Transition frequency
I
C
= 20 mA, V
CE
= 5 V, f = 100 MHz
f
T
- 250 - MHz
Collector-base capacitance
V
CB
= 10 V, f = 1 MHz
C
cb
- 1.5 - pF
Emitter-base capacitance
V
EB
= 0.5 V, f = 1 MHz
C
eb
- 8 -
Short-circuit input impedance
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
-
-
-
kΩ
Open-circuit reverse voltage transf. ratio
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
-
-
-
10
-4
Short-circuit forward current transf. ratio
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
-
-
-
-
Open-circuit output admittance
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
-
-
-
µS
Noise figure
I
C
= 0.2 mA, V
CE
= 5 V, f = 1 kHz,
∆
f = 200 Hz, R
S
= 2 kΩ, BC859, BC850
F
- 1 4 dB
Equivalent noise voltage
I
C
= 200 mA, V
CE
= 5 V, R
S
= 2 kΩ,
f = 10...50 Hz, BC860
V
n
- - 0.11 µV