2N2857
Prelim. 7/98
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612. e-mail sales@semelab.co.uk
Website http://www.semelab.co.uk
ABSOLUTE MAXIMUM RATINGS
(T
A
= 25C unless otherwise stated)
30V
15V
2.5V
40mA
200mW
300mW
65 to 200C
V
CBO
Collector Base Voltage
V
CEO
Collector Emitter Voltage
V
EBO
Emitter Base Voltage
I
C
Collector Current
P
D
Total Device Dissipation
@ T
A
=25C
P
D
Total Device Dissipation
@ T
C
=25C
T
STG
, T
J
Operating and Storage Temperature Range
NPN TRANSISTOR
FEATURES
SILICON NPN TRANSISTOR
APPLICATIONS:
AMPLIFIER, OSCILLATOR AND
CONVERTER APPLICATIONS UP TO
500MHz
MECHANICAL DATA
Dimensions in mm (inches)
TO-72 METAL PACKAGE
0.48 (0.019)
0.41 (0.016)
dia.
4.95 (0.195)
4.52 (0.178)
4.95 (0.195)
4.52 (0.178)
5.
33 (0.
2
10)
4.
32 (0.
1
70)
1
2
.7
(
0
.5
0
0
)
mi
n
.
1
2
3
4
2.54 (0.100)
Nom.
2N2857
Prelim. 7/98
Semelab plc.
Telephone +44(0)1455) 556565. Fax +44(0)1455) 552612. e-mail sales@semelab.co.uk
Website http://www.semelab.co.uk
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
nA
A
--
dB
pF
dB
ps
GHz
pF
mW
30
15
2.5
10
1
30
150
3.8
4.5
1.4
12.5
19
4
7
15
1
1.9
0.6
1
30
I
C
= 1
A
I
E
= 0
I
C
= 3mA
I
B
= 0
I
E
= 10
A
I
C
= 0
V
CB
= 15V
I
E
= 0
Tamb= 150C
V
CE
= 1V
I
C
= 3mA
V
CE
= 6V
I
C
= 1.5mA
f = 450MHz
R
G
= 50
V
EB
= 0.5V
I
C
= 0
f = 1 MHz
V
CE
= 6V
I
C
= 1.5mA
f = 450MHz
R
G
= 50
V
CB
= 6V
I
C
= 2mA
f = 31.9MHz
V
CE
= 6V
I
C
= 5mA
f = 100 MHz
V
CE
= 10V
I
C
= 0
f = 1 MHz
V
CB
= 10V
I
C
= 12mA
f = 500MHz
ELECTRICAL CHARACTERISTICS
(TA = 25C unless otherwise stated)
V
(BR)CBO*
Collector Base Breakdown Voltage
V
(BR)CEO
Collector Emitter Breakdown Voltage
V
(BR)EBO
Emitter Base Breakdown Voltage
I
CBO
Collector Base Cut-off Current
h
FE
DC Current Gain
NF
Noise Figure
C
EBO
Emitter Base Capacitance
G
pe
Power Gain (Neutralised)
r
bB
'C
'b'c
Feedback Time Constant
fT
Transition Frequency
Cre
Reverse Capacitance
Pc
Oscillator Power Output
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