2N4123_08 Datasheet, PDF (3/6 Pages) ON Semiconductor – General Purpose Transistors

2N4123, 2N4124
10
7.0
5.0
C_ibo
3.0
2.0
C_obo
1.0
0.1
0.2 0.3 0.5 0.7 1.0 2.0 3.0 5.0 7.0 10
REVERSE BIAS VOLTAGE (VOLTS)
Figure 1. Capacitance
20 30 40
200
100
t_s
70
50
t_d
30
t_f
t_r
20
10.0
V_CC = 3 V
I_C/I_B = 10
7.0
V_EB(off) = 0.5 V
5.0
1.0 2.0 3.0 5.0 7.0 10
20 30 50 70 100 200
I_C, COLLECTOR CURRENT (mA)
Figure 2. Switching Times
AUDIO SMALL−SIGNAL CHARACTERISTICS
NOISE FIGURE
(V_CE = 5 Vdc, T_A = 25°C)
Bandwidth = 1.0 Hz
12
SOURCE RESISTANCE = 200 W
10
I_C = 1 mA
14
f = 1 kHz
12
I_C = 1 mA
8
SOURCE RESISTANCE = 200 W
I_C = 0.5 mA
6
SOURCE RESISTANCE = 1 kW
I_C = 50 mA
4
10
I_C = 0.5 mA
8
6
4
I_C = 50 mA
I_C = 100 mA
2 _{SOURCE RESISTANCE = 500 W}
I_C = 100 mA
0
0.1 0.2 0.4
12 4
10 20 40 100
f, FREQUENCY (kHz)
2
0
0.1 0.2 0.4 1.0 2.0 4.0 10 20 40 100
R_S, SOURCE RESISTANCE (kW)
Figure 3. Frequency Variations
Figure 4. Source Resistance
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