2005 Fairchild Semiconductor Corporation
1
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MMBT3906K Rev. A
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February 2005
MMBT3906K
PNP Epitaxial Silicon Transistor
General Purpose Transistor
Absolute Maximum Ratings
T
a
= 25C unless otherwise noted
Electrical Characteristics
T
a
=25
C unless otherwise noted
* Pulse Test: Pulse Width
300
s, Duty Cycle
2%
Symbol
Parameter
Value
Units
V
CBO
Collector-Base Voltage
-40
V
V
CEO
Collector-Emitter Voltage
-40
V
V
EBO
Emitter-Base Voltage
-5
V
I
C
Collector Current
-200
mA
P
C
Collector Power Dissipation
350
mW
T
STG
Storage Temperature
150
C
Symbol
Parameter
Test Condition
Min.
Max.
Units
BV
CBO
Collector-Base Breakdown Voltage
I
C
= -10
A, I
E
= 0
-40
V
BV
CEO
Collector-Emitter Breakdown Voltage *
I
C
= -1.0mA, I
B
= 0
-40
V
BV
EBO
Emitter-Base Breakdown Voltage
I
E
= 10
A, I
C
= 0
-5
V
I
CEX
Collector Cut-off Current
V
CE
= -30V, V
EB
= -3V
-50
nA
h
FE
DC Current Gain *
V
CE
= -1V, I
C
= -0.1mA
V
CE
= -1V, I
C
= -1mA
V
CE
= -1V, I
C
= -10mA
V
CE
= -1V, I
C
= -50mA
V
CE
= -1V, I
C
= -100mA
60
80
100
60
30
300
V
CE
(sat)
Collector-Emitter Saturation Voltage *
I
C
= -10mA, I
B
= -1mA
I
C
= -50mA, I
B
= -5.0mA
-0.25
-0.4
V
V
V
BE
(sat)
Base-Emitter Saturation Voltage *
I
C
= -10mA, I
B
= -1.0mA
I
C
= -50mA, I
B
= -5.0mA
-0.65
-0.85
-0.95
V
V
f
T
Current Gain Bandwidth Product
I
C
= -10mA, V
CE
= -20V, f = 100MHz
250
MHz
C
ob
Output Capacitance
V
CB
= -5V, I
E
=0, f=1.0MHz
4.5
pF
NF
Noise Figure
I
C
= -100
A, V
CE
= -5V, R
S
= 1K
f = 10Hz to 15.7KHz
4
dB
t
ON
Turn On Time
V
CC
= -3V, V
BE
= -0.5V
I
C
= -10mA, I
B1
= -1mA
70
ns
t
OFF
Turn Off Time
V
CC
= -3V, I
C
= -10mA, I
B1
= I
B2
= -1mA
300
ns
1. Base 2. Emitter 3. Collector
SOT-23
1
2
3
2AK
Marking
2
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MMBT3906K Rev. A
M
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39
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K
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Typical Performance Characteristics
Figure 1. DC current Gain
Figure 2. Base-Emitter Saturation Voltage
Collector-Emitter Saturation Voltage
Figure 3. Output Capacitance
Figure 4. Current Gain Bandwidth Product
-1
-10
-100
-1000
1
10
100
1000
V
CE
= -1V
h
FE
, D
C
CU
RRE
NT
GAIN
I
C
[A], COLLECTOR CURRENT
-0.1
-1
-10
-100
-0.01
-0.1
-1
-10
V
CE
(sat)
V
BE
(sat)
I
C
= 10 I
B
V
BE
(sat),
V
CE
(sat)[
V], SA
TUR
A
TIO
N
VO
LTA
G
E
I
C
[mA], COLLECTOR CURRENT
-1
-10
-100
0.1
1
10
100
I
E
= 0
f = 1MHz
C
ob
[
p
F]
,
CAPACI
T
ANCE
V
CB
[V], COLLECTOR-BASE VOLTAGE
-0.1
-1
-10
-100
10
100
1000
V
CE
= -20V
f
T
[MHz
],
C
URRE
NT
GA
IN B
A
NDW
IDT
H
PRODU
C
T
I
C
[mA], COLLECTOR CURRENT
TRADEMARKS
The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to
be an exhaustive list of all such trademarks.
4
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MMBT3906K Rev. A
DISCLAIMER
FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY
PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY
ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT
CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.
LIFE SUPPORT POLICY
FAIRCHILD'S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR
SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION.
As used herein:
1. Life support devices or systems are devices or systems which,
(a) are intended for surgical implant into the body, or (b) support
or sustain life, or (c) whose failure to perform when properly used
in accordance with instructions for use provided in the labeling,
can be reasonably expected to result in significant injury to the
user.
2. A critical component is any component of a life support device
or system whose failure to perform can be reasonably expected
to cause the failure of the life support device or system, or to
affect its safety or effectiveness.
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.
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