BC856ALT1,BLT1 BC857ALT1, BLT1,CLT1 BC858ALT1,BLT1,CLT1

3

Motorola Small–Signal Transistors, FETs and Diodes Device Data

BC857/BC858

Figure 1. Normalized DC Current Gain

IC, COLLECTOR CURRENT (mAdc)

2.0

Figure 2. “Saturation” and “On” Voltages

IC, COLLECTOR CURRENT (mAdc)

–0.2

0.2

Figure 3. Collector Saturation Region

IB, BASE CURRENT (mA)

Figure 4. Base–Emitter Temperature Coefficient

IC, COLLECTOR CURRENT (mA)

–0.6

–0.7

–0.8

–0.9

–1.0

–0.5

0

–0.2

–0.4

–0.1

–0.3

1.6

1.2

2.0

2.8

2.4

–1.2

–1.6

–2.0

–0.02

–1.0

–10

0

–20

–0.1

–0.4

–0.8

1.5

1.0

0.7

0.5

0.3

–0.2

–10

–100

–1.0

TA = 25°C

VBE(sat) @ IC/IB = 10

VCE(sat) @ IC/IB = 10

VBE(on) @ VCE = –10 V

VCE = –10 V

TA = 25°C

–55

°C to +125°C

IC = –100 mA

IC = –20 mA

–0.5 –1.0

–2.0

–5.0 –10

–20

–50

–100 –200

–0.1 –0.2

–0.5

–1.0

–2.0

–5.0

–10

–20

–50

–100

IC = –200 mA

IC = –50 mA

IC =

–10 mA

Figure 5. Capacitances

VR, REVERSE VOLTAGE (VOLTS)

10

Figure 6. Current–Gain – Bandwidth Product

IC, COLLECTOR CURRENT (mAdc)

–0.4

1.0

80

100

200

300

400

60

20

40

30

7.0

5.0

3.0

2.0

–0.5

TA = 25°C

Cob

Cib

–0.6

–1.0

–2.0

–4.0 –6.0

–10

–20 –30 –40

150

–1.0

–2.0 –3.0

–5.0

–10

–20

–30

–50

VCE = –10 V

TA = 25°C

TA = 25°C

1.0