BC237,A,B,C BC238B,C BC239,C

3

Motorola Small–Signal Transistors, FETs and Diodes Device Data

2.0

1.5

1.0

0.2

0.3

0.4

0.6

0.8

200

0.2

0.5

1.0

2.0

5.0

10

20

50

100

IC, COLLECTOR CURRENT (mAdc)

Figure 1. Normalized DC Current Gain

VCE = 10 V

TA = 25°C

1.0

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0

0.2

0.1

0.3 0.5 0.7 1.0

2.0 3.0 5.0 7.0 10

20 30

50 70 100

IC, COLLECTOR CURRENT (mAdc)

Figure 2. “Saturation” and “On” Voltages

TA = 25°C

VBE(sat) @ IC/IB = 10

VBE(on) @ VCE = 10 V

VCE(sat) @ IC/IB = 10

400

20

30

40

60

80

100

200

300

0.5

1.0

0.7

2.0

3.0

5.0 7.0

10

20

30

50

IC, COLLECTOR CURRENT (mAdc)

Figure 3. Current–Gain — Bandwidth Product

10

1.0

2.0

3.0

5.0

7.0

0.4

0.6 0.8 1.0

2.0

4.0

6.0 8.0 10

20

40

VR, REVERSE VOLTAGE (VOLTS)

Figure 4. Capacitances

VCE = 10 V

TA = 25°C

TA = 25°C

Cib

Cob

170

160

150

140

130

120

10

0.1

0.2

0.3

0.5

1.0

2.0

3.0

5.0

IC, COLLECTOR CURRENT (mAdc)

Figure 5. Base Spreading Resistance

VCE = 10 V

f = 1.0 kHz

TA = 25°C