Data Sheet

BC637, BC639, BC639−16
http://onsemi.com
3
I
C
, COLLECTOR CURRENT (mA)
h
FE
, DC CURRENT GAIN
f, CURRENT-GAIN — BANDWIDTH PRODUCT (MHz)
T
V, VOLTAGE (VOLTS)
V
, TEMPERATURE COEFFICIENTS (mV/ C)°θ
1000
1
2
5
10
20
50
100
200
500
1001 2 3 4 5 7 10 20 30 40 50 70
V
CE
, COLLECTOR-EMITTER VOLTAGE (VOLTS)
Figure 1. Active Region Safe Operating Area
BC635
BC637
BC639
P
D
T
A
25°C
P
D
T
C
25°C
SOA = 1S
P
D
T
C
25°C
P
D
T
A
25°C
500
200
100
50
20
1 3 5 10 30 50 100 300 500 1000
I
C
, COLLECTOR CURRENT (mA)
Figure 2. DC Current Gain
V
CE
= 2 V
500
300
100
50
20
1 10 100 1000
I
C
, COLLECTOR CURRENT (mA)
Figure 3. Current−Gain — Bandwidth Product
V
CE
= 2 V
1
0.8
0.6
0.4
0.2
0
1 10 100 1000
I
C
, COLLECTOR CURRENT (mA)
Figure 4. “Saturation” and “On” Voltages
V
BE(sat)
@ I
C
/I
B
= 10
V
BE(on)
@ V
CE
= 2 V
V
CE(sat)
@ I
C
/I
B
= 10
-0.2
-1.0
-2.2
-1.6
1 3 5 10 30 50 100 300 500 1000
I
C
, COLLECTOR CURRENT (mA)
Figure 5. Temperature Coefficients
V
CE
= 2 VOLTS
DT = 0°C to +100°C
q
V
for V
BE