BC556B, BC557, A, B, C, BC558B, C
ELECTRICAL CHARACTERISTICS (TA = 25°C unless otherwise noted)
Characteristic
Symbol
Min
Typ
Max
ON CHARACTERISTICS
DC Current Gain
(IC = –10 µAdc, VCE = –5.0 V)
(IC = –2.0 mAdc, VCE = –5.0 V)
(IC = –100 mAdc, VCE = –5.0 V)
A Series Device
B Series Devices
C Series Devices
BC557
A Series Device
B Series Devices
C Series Devices
A Series Device
B Series Devices
C Series Devices
hFE
–
90
–
–
150
–
–
270
–
120
–
800
120
170
220
180
290
460
420
500
800
–
120
–
–
180
–
–
300
–
Collector–Emitter Saturation Voltage
(IC = –10 mAdc, IB = –0.5 mAdc)
(IC = –10 mAdc, IB = see Note 1)
(IC = –100 mAdc, IB = –5.0 mAdc)
Base–Emitter Saturation Voltage
(IC = –10 mAdc, IB = –0.5 mAdc)
(IC = –100 mAdc, IB = –5.0 mAdc)
Base–Emitter On Voltage
(IC = –2.0 mAdc, VCE = –5.0 Vdc)
(IC = –10 mAdc, VCE = –5.0 Vdc)
SMALL–SIGNAL CHARACTERISTICS
VCE(sat)
VBE(sat)
VBE(on)
–
–
–
–
–
–0.55
–
–0.075
–0.3
–0.25
–0.7
–1.0
–0.62
–0.7
–0.3
–0.6
–0.65
–
–
–0.7
–0.82
Current–Gain – Bandwidth Product
(IC = –10 mA, VCE = –5.0 V, f = 100 MHz)
BC556
BC557
BC558
fT
–
280
–
–
320
–
–
360
–
Output Capacitance
(VCB = –10 V, IC = 0, f = 1.0 MHz)
Noise Figure
(IC = –0.2 mAdc, VCE = –5.0 V,
RS = 2.0 kW, f = 1.0 kHz, ∆f = 200 Hz)
BC556
BC557
BC558
Cob
–
3.0
6.0
NF
–
2.0
10
–
2.0
10
–
2.0
10
Small–Signal Current Gain
(IC = –2.0 mAdc, VCE = 5.0 V, f = 1.0 kHz)
BC557
A Series Device
B Series Devices
C Series Devices
hfe
125
–
900
125
–
260
240
–
500
450
–
900
Note 1: IC = –10 mAdc on the constant base current characteristics, which yields the point IC = –11 mAdc, VCE = –1.0 V.
Unit
–
V
V
V
MHz
pF
dB
–
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