BC237/238/239
BC237/238/239
Switching and Amplifier Applications
• Low Noise: BC239
TO-92
1
NPN Epitaxial Silicon Transistor
1. Collector 2. Base 3. Emitter
Absolute Maximum Ratings Ta=25°C unless otherwise noted
Symbol
VCES
Collector-Emitter Voltage
Parameter
: BC237
: BC238/239
Value
50
30
Units
V
V
VCEO
Collector-Emitter Voltage
: BC237
: BC238/239
45
25
V
V
VEBO
Emitter-Base Voltage
: BC237
: BC238/239
6
5
V
V
IC
Collector Current (DC)
100
mA
PC
Collector Power Dissipation
500
mW
TJ
Junction Temperature
150
°C
TSTG
Storage Temperature
-55 ~ 150
°C
Electrical Characteristics Ta=25°C unless otherwise noted
Symbol
BVCEO
Parameter
Collector-Emitter Breakdown Voltage
: BC237
: BC238/239
Emitter Base Breakdown Voltage
: BC237
: BC238/239
BVEBO
Collector Cut-off Current
: BC237
: BC238/239
ICES
Test Condition
Min.
Typ.
Max.
Units
IC=2mA, IB=0
45
25
V
V
IE=1µA, IC=0
6
5
V
V
0.2
0.2
VCE=50V, VBE=0
VCE=30V, VBE=0
15
15
120
nA
nA
hFE
DC Current Gain
VCE=5V, IC=2mA
VCE (sat)
Collector-Emitter Saturation Voltage
IC=10mA, IB=0.5mA
IC=100mA, IB=5mA
0.07
0.2
800
0.2
0.6
V
V
VBE (sat)
Collector-Base Saturation Voltage
IC=10mA, IB=0.5mA
IC=100mA, IB=5mA
0.73
0.87
0.83
1.05
V
V
0.55
0.62
0.7
150
85
250
VBE (on)
Base-Emitter On Voltage
VCE=5V, IC=2mA
fT
Current Gain Bandwidth Product
VCE=3V, IC=0.5mA, f=100MHz
VCE=5V, IC=10mA, f=100MHz
Cob
Output Capacitance
VCB=10V, IE=0, f=1MHz
3.5
Cib
Input Base Capacitance
VEB=0.5V, IC=0, f=1MHz
8
NF
Noise Figure
VCE=5V, IC=0.2mA,
f=1KHz RG=2KΩ
VCE=5V, IC=0.2mA
RG=2KΩ, f=30~15KHz
: BC237/238
: BC239
: BC239
V
MHz
MHz
6
pF
pF
2
10
4
4
dB
dB
dB
hFE Classification
Classification
A
B
C
hFE
120 ~ 220
180 ~ 460
380 ~ 800
©2002 Fairchild Semiconductor Corporation
Rev. A2, August 2002
BC237/238/239
Typical Characteristics
100
IB = 400µA
VCE = 5V
IC[mA], COLLECTOR CURRENT
IC[mA], COLLECTOR CURRENT
100
IB = 350µA
IB = 300µA
80
IB = 250µA
60
IB = 200µA
IB = 150µA
40
IB = 100µA
20
10
1
IB = 50µA
0.1
0.0
0
0
2
4
6
8
10
12
14
16
18
20
VCE = 5V
hFE, DC CURRENT GAIN
1000
100
10
1
100
0.8
1.0
1.2
10000
IC = 10 IB
V BE(sat)
1000
100
V CE(sat)
10
1000
1
IC[mA], COLLECTOR CURRENT
10
100
1000
IC[mA], COLLECTOR CURRENT
Figure 3. DC current Gain
Figure 4. Base-Emitter Saturation Voltage
Collector-Emitter Saturation Voltage
1000
f=1MHz
IE = 0
10
1
0.1
1
10
100
VCB[V], COLLECTOR-BASE VOLTAGE
Figure 5. Output Capacitance
©2002 Fairchild Semiconductor Corporation
1000
fT, CURRENT GAIN-BANDWIDTH PRODUCT
100
Cob[pF], CAPACITANCE
0.6
Figure 2. Transfer Characteristic
VBE(sat), VCE(sat)[mV], SATURATION VOLTAGE
Figure 1. Static Characteristic
10
0.4
VBE[V], BASE-EMITTER VOLTAGE
VCE[V], COLLECTOR-EMITTER VOLTAGE
1
0.2
VCE = 5V
100
10
1
0.1
1
10
100
IC[mA], COLLECTOR CURRENT
Figure 6. Current Gain Bandwidth Product
Rev. A2, August 2002
BC237/238/239
Package Dimensions
TO-92
+0.25
4.58 ±0.20
4.58 –0.15
±0.10
14.47 ±0.40
0.46
1.27TYP
[1.27 ±0.20]
1.27TYP
[1.27 ±0.20]
±0.20
(0.25)
+0.10
0.38 –0.05
1.02 ±0.10
3.86MAX
3.60
+0.10
0.38 –0.05
(R2.29)
Dimensions in Millimeters
©2002 Fairchild Semiconductor Corporation
Rev. A2, August 2002
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PRODUCT STATUS DEFINITIONS
Definition of Terms
Datasheet Identification
Product Status
Definition
Advance Information
Formative or In
Design
This datasheet contains the design specifications for
product development. Specifications may change in
any manner without notice.
Preliminary
First Production
This datasheet contains preliminary data, and
supplementary data will be published at a later date.
Fairchild Semiconductor reserves the right to make
changes at any time without notice in order to improve
design.
No Identification Needed
Full Production
This datasheet contains final specifications. Fairchild
Semiconductor reserves the right to make changes at
any time without notice in order to improve design.
Obsolete
Not In Production
This datasheet contains specifications on a product
that has been discontinued by Fairchild semiconductor.
The datasheet is printed for reference information only.
©2002 Fairchild Semiconductor Corporation
Rev. I1
