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

2

Motorola Small–Signal Transistors, FETs and Diodes Device Data

Characteristic

Symbol

Min

Typ

Max

Unit

ON CHARACTERISTICS

DC Current Gain

(IC = 10 µA, VCE = 5.0 V)

BC237A

BC237B/238B

BC237C/238C/239C

(IC = 2.0 mA, VCE = 5.0 V)

BC237

BC239

BC237A

BC237B/238B

BC237C/238C/239C

(IC = 100 mA, VCE = 5.0 V)

BC237A

BC237B/238B

BC237C/238C/239C

hFE

—

—

—

120

120

120

200

380

—

—

—

90

150

270

—

—

170

290

500

120

180

300

—

—

—

800

800

220

460

800

—

—

—

—

Collector – Emitter On Voltage

(IC = 10 mA, IB = 0.5 mA)

BC237/BC238/BC239

(IC = 100 mA, IB = 5.0 mA)

BC237/BC239

BC238

VCE(sat)

—

—

0.07

0.2

0.2

0.6

0.8

V

Base – Emitter Saturation Voltage

(IC = 10 mA, IB = 0.5 mA)

(IC = 100 mA, IB = 5.0 mA)

VBE(sat)

—

—

0.6

—

0.83

1.05

V

Base–Emitter On Voltage

(IC = 100 µA, VCE = 5.0 V)

(IC = 2.0 mA, VCE = 5.0 V)

(IC = 100 mA, VCE = 5.0 V)

VBE(on)

—

0.55

—

0.5

0.62

0.83

—

0.7

—

V

DYNAMIC CHARACTERISTICS

Current – Gain — Bandwidth Product

(IC = 0.5 mA, VCE = 3.0 V, f = 100 MHz)

BC237

BC238

BC239

(IC = 10 mA, VCE = 5.0 V, f = 100 MHz)

BC237

BC238

BC239

fT

—

—

—

150

150

150

100

120

140

200

240

280

—

—

—

—

—

—

MHz

Collector–Base Capacitance

(VCB = 10 V, IC = 0, f = 1.0 MHz)

Cobo

—

—

4.5

pF

Emitter–Base Capacitance

(VEB = 0.5 V, IC = 0, f = 1.0 MHz)

Cibo

—

8.0

—

pF

Noise Figure

(IC = 0.2 mA, VCE = 5.0 V, RS = 2.0 kΩ,

f = 1.0 kHz)

BC239

(IC = 0.2 mA, VCE = 5.0 V, RS = 2.0 kΩ,

f = 1.0 kHz,

∆f = 200 Hz)

BC237

BC238

BC239

NF

—

—

—

—

2.0

2.0

2.0

2.0

4.0

10

10

4.0

dB