2N2857
ELECTRICAL CHARACTERISTICS
Parameter
V
(BR)CBO*
V
(BR)CEO
V
(BR)EBO
I
CBO
h
FE
NF
C
EBO
G
pe
r
bB
’C
’b’c
fT
Cre
Pc
Collector – Base Breakdown Voltage
Emitter – Base Breakdown Voltage
Collector – Base Cut-off Current
DC Current Gain
Noise Figure
Emitter Base Capacitance
Power Gain (Neutralised)
Feedback Time Constant
Transition Frequency
(TA = 25°C unless otherwise stated)
Test Conditions
I
C
= 1µA
I
E
= 10µA
V
CB
= 15V
I
E
= 0
V
CE
= 1V
V
CE
= 6V
f = 450MHz
V
EB
= 0.5V
f = 1 MHz
V
CE
= 6V
f = 450MHz
V
CB
= 6V
f = 31.9MHz
V
CE
= 6V
f = 100 MHz
V
CE
= 10V
f = 1 MHz
V
CB
= 10V
f = 500MHz
I
C
= 12mA
I
C
= 5mA
I
C
= 0
I
C
= 1.5mA
R
G
= 50Ω
I
C
= 2mA
Tamb= 150°C
I
C
= 3mA
I
C
= 1.5mA
R
G
= 50Ω
I
C
= 0
I
E
= 0
I
B
= 0
I
C
= 0
Min.
30
15
2.5
Typ.
Max. Unit
V
10
1
nA
µA
—
dB
pF
19
dB
ps
GHz
pF
mW
Collector – Emitter Breakdown Voltage I
C
= 3mA
30
3.8
1.4
12.5
4
1
0.6
30
7
150
4.5
15
1.9
1
Reverse Capacitance
Oscillator Power Output
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612. e-mail sales@semelab.co.uk
Website http://www.semelab.co.uk
Prelim. 7/98
SEME-LAB [ SEME LAB ]
