MMBT3904
ELECTRICAL CHARACTERISTICS
Ratings at 25¡C ambient temperature unless otherwise specified
SYMBOL
MIN.
MAX.
UNIT
Voltage Feedback Ratio
V
CE
= 10 V, I
C
= 1 mA, f = 1 kHz
Small Signal Current Gain
at V
CE
= 10 V, I
C
= 1 mA, f = 1 kHz
Output Admittance
at V
CE
= 1 V, I
C
= 1 mA, f = 1 kHz
Noise Figure
at V
CE
= 5 V, I
C
= 100
mA,
R
G
= 1 kW,
f = 10 É 15000 Hz
Delay Time (see Fig. 1)
at I
B1
= 1 mA, I
C
= 10 mA
Rise Time (see Fig. 1)
at I
B1
= 1 mA, I
C
= 10 mA
Storage Time (see Fig. 2)
at ÐI
B1
= I
B2
= 1 mA, I
C
= 10 mA
Fall Time (see Fig. 2)
at ÐI
B1
= I
B2
= 1 mA, I
C
= 10 mA
h
re
0.5 . 10
Ð4
8 . 10
Ð4
Ð
h
fe
100
400
Ð
h
oe
1
40
mS
NF
Ð
5
dB
t
d
Ð
35
ns
t
r
Ð
35
ns
t
s
Ð
200
ns
t
f
Ð
50
ns
Fig. 1:
Test circuit for delay and rise time
* total shunt capacitance of test jig and connectors
0.30 (7.5)
0.12 (3)
Fig. 2:
Test circuit for storage and fall time
* total shunt capacitance of test jig and connectors
.04 (1)
.08 (2)
.04 (1)
.08 (2)
0.59 (15)
0.47 (12)
0.03 (0.8)
0.2 (5)
Dimensions in inches and (millimeters)
0.06 (1.5)
0.20 (5.1)
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