9261 Owensmouth Ave.
Chatsworth, Ca 91311
Phone: (818) 701-4933
Fax: (818) 701-4939 MMBT3904
NPN General
Purpose Amplifier
SOT-23
Suggested Solder
Pad Layout
Features
• Surface Mount SOT-23 Package
• Capable of 350mWatts of Power Dissipation
DIMENSIONS
INCHES MM
DIM MIN MAX MIN MAX NOTE
A.110 .120 2.80 3.04
B.083 .098 2.10 2.64
C.047 .055 1.20 1.40
D.035 .041 .89 1.03
E.070 .081 1.78 2.05
F.018 .024 .45 .60
G.0005 .0039 .013 .100
H.035 .044 .89 1.12
J.003 .007 .085 .180
K.015 .020 .37 .51
Electrical Characteristics @ 25°C Unless Otherwise Specified
Symbol Parameter Min Max Units
OFF CHARACTERISTICS
V(BR)CEO Collector-Emitter Breakdown Voltage*
(IC=1.0mAdc, IB=0) 40 Vdc
V(BR)CBO Collector-Base Breakdown Voltage
(IC=10µAdc, IE=0) 60 Vdc
V(BR)EBO Emitter-Base Breakdown Voltage
(IE=10µAdc, IC=0) 6.0 Vdc
IBL Base Cutoff Current
(VCE=30Vdc, V BE=3.0Vdc) 50 nAdc
ICEX Collector Cutoff Current
(VCE=30Vdc, V BE=3.0Vdc) 50 nAdc
ON CHARACTERISTICS
hFE DC Current Gain*
(IC=0.1mAdc, VCE=1.0Vdc)
(IC=1.0mAdc, VCE=1.0Vdc)
(IC=10mAdc, VCE=1.0Vdc)
(IC=50mAdc, VCE=1.0Vdc)
(IC=100mAdc, VCE=1.0Vdc)
40
70
100
60
30
300
VCE(sat) Collector-Emitter Saturation Voltage
(IC=10mAdc, IB=1.0mAdc)
(IC=50mAdc, IB=5.0mAdc) 0.2
0.3 Vdc
VBE(sat) Base-Emitter Saturation Voltage
(IC=10mAdc, IB=1.0mAdc)
(IC=50mAdc, IB=5.0mAdc) 0.65 0.85
0.95 Vdc
SMALL-SIGNAL CHARACTERISTICS
fTCurrent Gain-Bandwidth Product
(IC=10mAdc, VCE=20Vdc, f=100MHz) 300 MHz
Cobo Output Capacitance
(VCB=5.0Vdec, IE=0, f=1.0MHz) 4.0 pF
Cibo Input Capacitance
(VBE=0.5Vdc, IC=0, f=1.0MHz) 8.0 pF
NF Noise Figure
(IC=100µAdc, VCE=5.0Vdc, RS=1.0kΩ
f=10Hz to 15.7kHz) 5.0 dB
SWITCHING CHARACTERISTICS
td Delay Time (VCC=3.0Vdc, V BE=0.5Vdc 35 ns
tr Rise Time IC=10mAdc, I B1=1.0mAdc) 35 ns
ts Storage Time (VCC=3.0Vdc, IC=10mAdc 200 ns
tf Fall Time IB1=IB2=1.0mAdc) 50 ns
*Pulse Width ≤ 300 µs, Duty Cycle ≤ 2.0%
Santa Ana: (714) 979-8220 Scottsdale: (602) 941-6300 Colorado: (303) 469-2161 Watertown: (617) 926-0404 Chatsworth: (818) 701-4933
Sertech Labs: (617) 924-9280 Ireland: (353) 65-40044 Bombay: (91) 22-832-002 Hong Kong: (852) 2692-1202
.079
2.000
inches
mm
.031
.800
.035
.900
.037
.950
.037
.950
1 A
C
B E
Pin Configuration
Top View
K
A
B
C
D
E
F
G
H
J
MMBT3904
Santa Ana: (714) 979-8220 Scottsdale: (602) 941-6300 Colorado: (303) 469-2161 Watertown: (617) 926-0404 Chatsworth: (818) 701-4933
Sertech Labs: (617) 924-9280 Ireland: (353) 65-40044 Bombay: (91) 22-832-002 Hong Kong: (852) 2692-1202
DC Current Gain vs Collector Current
hFE
IC (mA)
40
80
120
160
200
220
0.1 110 100
Base-Emitter ON Voltage vs
Collector Current
VBE(ON) - (V)
IC - (mA)
0
0.2
0.4
0.6
0.8
1.0
1.2
0.1 1.0 10 100
Collector Saturation
Volatge vs Collector Current Base Saturation
Voltage vs Collector Current
VCE(SAT) - (V) VBE(SAT) - (V)
0
.025
.050
.075
.100
.125
.150
0.1 1.0 10 100 .60
.70
.80
.90
1.0
1.1
1.2
0.1 1.0 10 100
IC - (mA) IC - (mA)
Collector Cutoff Current vs
Ambient Temperature Capacitance vs
Reverse Bias Voltage
ICBO - (mA)
TA - (°C) Volts - (V)
pF
1.0
10
100
1000
025 50 75 100 125 150
VCB = 20V
0
2
4
6
8
1.0
0.1 1.0 10
COB
CIB
f = 1 MHz
IC/IB = 10
TA = 25°CIC/IB = 10
TA = 25°C
VCE = 5.0V VCE = 5.0V
TA = 25°C
TA = 100°C
MMBT3904
Santa Ana: (714) 979-8220 Scottsdale: (602) 941-6300 Colorado: (303) 469-2161 Watertown: (617) 926-0404 Chatsworth: (818) 701-4933
Sertech Labs: (617) 924-9280 Ireland: (353) 65-40044 Bombay: (91) 22-832-002 Hong Kong: (852) 2692-1202
f - (kHz)
Maximum Power Dissipation vs
Ambient Temperature Noise Figure vs
Source Resistance
PD(MAX) - (mW)
TA - (°C)
TO-92
SOT-23
0
200
400
600
800
050 100 150 200
NF - (dB)
RS - (kΩ)
0
2
4
6
8
10
12
0.1 1.0 10 100
IC = 1.0mA
IC = 100µA
f = 1.0kHz
Contours of Constant Gain
Bandwidth Product (fT)Current Gain
VCE - (V)
IC - (mA)
hfe
IC - (mA)
VCE = 10V
f = 1.0kHz
0
2
4
6
8
10
12
0.1 1.0 10 100 10
100
1000
0.1 1.0 10
Noise Figure vs
Frequency Switching Times vs
Collector Current
NF - (dB) T - (ns)
IC - (mA)
1.0
10
100
1000
1.0 10 100
IB1 = IB2 = IC/10
ts
t
f
t
r
VCE = 5.0V
IC = 0.5mA RS = 200 Ω
IC = 100µA RS = 500Ω
IC = 50 µA R S = 1.0kΩ
0.1 1.0 10 100
0
1
2
3
4
5
6
*100MHz increments from
200 to 500MHz
MMBT3904
Santa Ana: (714) 979-8220 Scottsdale: (602) 941-6300 Colorado: (303) 469-2161 Watertown: (617) 926-0404 Chatsworth: (818) 701-4933
Sertech Labs: (617) 924-9280 Ireland: (353) 65-40044 Bombay: (91) 22-832-002 Hong Kong: (852) 2692-1202
Input Impedance Output Admittance
hie - (kΩ)
IC - (mA) IC - (mA)
hoe - (µΩ)
VCE = 10V
f = 1.0kHz VCE = 10V
f = 1.0kHz
0.1
1.0
10
0.1 1.0 10 0.1 1.0 10
1
10
100
Voltage Feedback Ratio
Turn On and Turn Off Times vs
Collector Current
hfe - (X10
-4
)
IC - (mA) IC - (mA)
T - (ns)
1.0
10
100
0.1 1.0 10 1.0
10
100
1000
1.0 10 100
ton IB1 = IC/10
VBE(OFF) = 0.5V
toff IB1 = IB2 = IC/10
toff
ton
