PN4258_02 Datasheet, PDF (4/8 Pages) Fairchild Semiconductor – PNP Switching Transistor

Typical Chracteristics (Continued)
F = 1.0 MHz
2.8
2.4
2
1.6 _{Cibo IC = 0}
C_obo I = 0
1.2
0
-2
-4
-6
-8
-10
REVERSE BIAS VOLTAGE (V)
Figure 7. Input/Output Capacitance
vs Reverse Bias Voltage
100
50
20
10
5
2
1
1
V_CC = -1.5V
I _C = 10 I_B1= 10 I _B2
V _{BE (O)} = 0
t_s
t_f
2
5
10
20
I _C - COLLECTOR CURRENT (mA)
tr
t_d
50
Figure 9. Switching Times
vs Collector Current
Delay Time vs. Turn On Base
Current / Reverse Emitter Voltage
4
t_d = 20 ns
3
10 ns
8.0 ns
2
5.0 ns
3.0 ns
1
0
0.5
1
I _C = 10 mA
V_CC = -1.5V
2
3
45
I_B1 - TURN ON BASE CURRENT (mA)
Figure 11. Delay Time vs Turn On Base
Current/Reverse Emitter Voltage
-14
-12
-10
-8
1500 MHz
-6
1200 MHz
-4
600 MHz
-2
200 MHz
0
0.1
500 MHz
1
900 MHz
10
200 MHz
100
I _C - COLLECTOR CURRENT (mA)
Figure 8. Contours of Constant Gain
Bandwidth Produtct (f_T)
20
I _C = 10 mA
I _B1 = I _B2 = 1 mA
15 ^VCC ^{= -1.5V}
V BE (O) = 0
10
5
t_f
t_s
t_r
t_d
0
-5 0
0
50
10 0
15 0
T_A - AMBIE NT TEMP ERATURE (_°C)
Figure 10. Switching Times
vs Ambient Temperature
Turn-On Base Currents
10
V_CC = -1.5V
5
2
t _f = 2.0 ns
5.0 ns
1
10 ns
0.5
20 ns
0.2
0.1
1
2
5
10
20
50
I _C - COLLECTOR CURRENT (mA)
Figure 12. Rise Time vs Collector and
Turn-On Base Currents
©2002 Fairchild Semiconductor Corporation
Rev. B, November 2002