BC618
SMALL−SIGNAL CHARACTERISTICS
20
4.0
VCE = 5.0 V
10
TJ = 25°C
f = 100 MHz
2.0 TJ = 25°C
7.0
Cibo
1.0
5.0
Cobo
0.8
0.6
3.0
0.4
2.0
0.04
0.1 0.2 0.4 1.0 2.0 4.0 10 20 40
VR, REVERSE VOLTAGE (VOLTS)
Figure 6. Capacitance
0.2
0.5 1.0 2.0
0.5 10 20
50 100 200 500
IC, COLLECTOR CURRENT (mA)
Figure 7. High Frequency Current Gain
200 k
100 k
70 k
50 k
TJ = 125°C
25°C
30 k
20 k
10 k
7.0 k
5.0 k
−55 °C
3.0 k
VCE = 5.0 V
2.0 k
5.0 7.0 10
20 30 50 70 100 200 300 500
IC, COLLECTOR CURRENT (mA)
Figure 8. DC Current Gain
3.0
2.5
IC = 10 mA 50 mA
2.0
250 mA 500 mA
TJ = 25°C
1.5
1.0
0.5
0.1 0.2 0.5 1.0 2.0 5.0 10 20 50 100 200 500 1000
IB, BASE CURRENT (mA)
Figure 9. Collector Saturation Region
1.6
TJ = 25°C
1.4
VBE(sat) @ IC/IB = 1000
1.2
VBE(on) @ VCE = 5.0 V
1.0
0.8
VCE(sat) @ IC/IB = 1000
0.6
5.0 7.0 10
20 30 50 70 100 200 300 500
IC, COLLECTOR CURRENT (mA)
Figure 10. “On” Voltages
−1.0
*APPLIES FOR IC/IB ≤ hFE/3.0
−2.0 *RqVC FOR VCE(sat)
−3.0
−4.0
qVB FOR VBE
−5.0
25°C TO 125°C
−55 °C TO 25°C
25°C TO 125°C
−55 °C TO 25°C
−6.0
5.0 7.0 10
20 30 50 70 100 200 300 500
IC, COLLECTOR CURRENT (mA)
Figure 11. Temperature Coefficients
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