MMBT3904WT1G, NPN, SMMBT3904WT1G, NPN, MMBT3906WT1G, PNP,
SMMBT3906WT1G, PNP
www.onsemi.com
9
MMBT3906WT1, SMMBT3906WT1
Figure 22. Delay and Rise Time
Equivalent Test Circuit
Figure 23. Storage and Fall Time
Equivalent Test Circuit
3 V
275
10 k
1N916
C
S
< 4 pF*
3 V
275
10 k
C
S
< 4 pF*
< 1 ns
+10.6 V
300 ns
DUTY CYCLE = 2%
< 1 ns
+9.1 V
10.9 V
DUTY CYCLE = 2%
t
1
0
10 < t
1
< 500 ms
* Total shunt capacitance of test jig and connectors
TYPICAL TRANSIENT CHARACTERISTICS
T
J
= 25°C
T
J
= 125°C
Figure 24. Turn−On Time
I
C
, COLLECTOR CURRENT (mA)
70
100
200
300
500
50
TIME (ns)
1.0 2.0 3.0 10 20
70
5
100
5.0 7.0 30 50
200
10
30
7
20
I
C
/I
B
= 10
t
r
@ V
CC
= 3.0 V
t
d
@ V
OB
= 0 V
40 V
15 V
2.0 V
MMBT3906WT1
Figure 25. Fall Time
I
C
, COLLECTOR CURRENT (mA)
70
100
200
300
500
50
1.0 2.0 3.0 10 20
70
5
100
5.0 7.0 30 50
200
10
30
7
20
t , FALL TIME (ns)
f
V
CC
= 40 V
I
B1
= I
B2
I
C
/I
B
= 20
I
C
/I
B
= 10
MMBT3906WT1
TYPICAL AUDIO SMALL−SIGNAL CHARACTERISTICS
NOISE FIGURE VARIATIONS
(V
CE
= −5.0 Vdc, T
A
= 25°C, Bandwidth = 1.0 Hz)
f = 1.0 kHz
I
C
= 1.0 mA
I
C
= 0.5 mA
I
C
= 50 mA
I
C
= 100 mA
SOURCE RESISTANCE = 200 W
I
C
= 1.0 mA
SOURCE RESISTANCE = 200 W
I
C
= 0.5 mA
SOURCE RESISTANCE = 2.0 k
I
C
= 100 mA
SOURCE RESISTANCE = 2.0 k
I
C
= 50 mA
Figure 26.
f, FREQUENCY (kHz)
1.0
2.0
3.0
4.0
5.0
0.1
Figure 27.
R
S
, SOURCE RESISTANCE (kW)
0
NF, NOISE FIGURE (dB)
1.0 2.0 4.0 10 20
40
0.2 0.4
0
100
4.0
6.0
8.0
10
2.0
12
0.1 1.0 2.0 4.0 10 20
40
0.2 0.4
100
NF, NOISE FIGURE (dB)
MMBT3906WT1
MMBT3906WT1
