BC177
BC178-BC179
LOW NOISE GENERAL PURPOSE AUDIO AMPLIFIERS
DESCRIPTION
The BC177, BC178 and BC179 are silicon planar
epitaxial PNP transistors in TO-18 metal case.They
are suitable for use in driver audio stages, low noise
input audio stages and as low power, high gain
general purpose transistors. The complementary
NPN types are respectively the BC107, BC108 and
BC109.
TO-18
INTERNAL SCHEMATIC DIAGRAM
ABSOLUTE MAXIMUM RATINGS
Symbol
V
CES
V
CEO
V
EBO
I
C
I
CM
P
t o t
T
st g
T
j
January 1989
Parameter
Collector-emitter Voltage (V
BE
= 0)
Collector-emitter Voltage (I
B
= 0)
Emitter-base Voltage (I
C
= 0)
Collector Current
Collector Peak Current
Total Power Dissipation at T
amb
≤
25
°C
Storage Temperature
Junction Temperature
Value
BC177
– 50
– 45
BC178
– 30
– 25
–5
– 100
– 200
300
– 65 to 175
175
BC179
– 25
– 20
Unit
V
V
V
mA
mA
mW
°C
°C
1/6
BC177-BC178-B179
THERMAL DATA
R
t h j- cas e
R
t h j -amb
Thermal Resistance Junction-case
Thermal Resistance Junction-ambient
Ma x
Ma x
200
500
°C/W
°C/W
ELECTRICAL CHARACTERISTICS
(T
amb
= 25
°C
unless otherwise specified)
Symbol
I
CE S
V
(BR)CE O
*
Parameter
Collector Cutoff Current
(V
BE
= 0)
Collector-emitter
Breakdown Voltage
(I
B
= 0)
Collector-emitter
Breakdown Voltage
(V
BE
= 0)
Emitter-base
Breakdown Voltage
(I
C
= 0)
Collector-emitter
Saturation Voltage
Base-emitter Voltage
Base-emitter
Saturation Voltage
Small Signal
Current Gain
Test Conditions
V
CE
= – 20 V
V
CE
= – 20 V
I
C
= – 2 mA
for
BC177
for
BC178
for
BC179
I
C
= – 10
µA
for
BC177
for
BC178
for
BC179
I
E
= – 10
µA
– 50
– 30
– 25
–5
V
V
V
V
– 45
– 25
– 20
V
V
V
T
amb
= 150
°C
Min.
Typ.
– 1
Max.
– 100
– 10
Unit
nA
µA
V
(B R)CES
V
(B R)E BO
V
CE( sat )
*
V
B E
*
V
BE (s at )
h
fe
I
C
= – 10 mA
I
C
= – 100 mA
I
C
= – 2 mA
I
C
= – 10 mA
I
C
= – 100 mA
I
C
= – 2 mA
f = 1 kHz
I
B
= – 0.5 mA
I
B
= – 5 mA
V
CE
= – 5 V
I
B
= – 0.5 mA
I
B
= – 5 mA
V
CE
= – 5 V
for
for
for
for
for
BC177
BC177
BC178
BC178
BC179
Gr. A
Gr. B
Gr. A
Gr. B
Gr. B
125
240
125
240
240
– 550
– 75
– 200
– 640
– 720
– 860
– 250
– 750
mV
mV
mV
mV
mV
260
500
260
500
500
* Pulsed : pulsed duration = 300
µs,
duty cycle = 1 %.
2/6
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