2
Motorola Small–Signal Transistors, FETs and Diodes Device Data
ELECTRICAL CHARACTERISTICS
(T
A
= 25°C unless otherwise noted) (Continued)
Characteristic
Symbol Min Max Unit
ON CHARACTERISTICS
DC Current Gain
(1)
(I
C
= 2.0 mAdc, V
CE
= 1.0 Vdc) 2N4123
2N4124
(I
C
= 50 mAdc, V
CE
= 1.0 Vdc) 2N4123
2N4124
h
FE
50
120
25
60
150
360
—
—
—
Collector–Emitter Saturation Voltage
(1)
(I
C
= 50 mAdc, I
B
= 5.0 mAdc)
V
CE(sat)
— 0.3 Vdc
Base–Emitter Saturation Voltage
(1)
(I
C
= 50 mAdc, I
B
= 5.0 mAdc)
V
BE(sat)
— 0.95 Vdc
SMALL–SIGNAL CHARACTERISTICS
Current–Gain — Bandwidth Product
(I
C
= 10 mAdc, V
CE
= 20 Vdc, f = 100 MHz) 2N4123
2N4124
f
T
250
300
—
—
MHz
Input Capacitance
(V
EB
= 0.5 Vdc, I
C
= 0, f = 1.0 MHz)
C
ibo
— 8.0 pF
Collector–Base Capacitance
(I
E
= 0, V
CB
= 5.0 V, f = 1.0 MHz)
C
cb
— 4.0 pF
Small–Signal Current Gain
(I
C
= 2.0 mAdc, V
CE
= 10 Vdc, R
S
= 10 k ohm, f = 1.0 kHz) 2N4123
2N4124
h
fe
50
120
200
480
—
Current Gain — High Frequency
(I
C
= 10 mAdc, V
CE
= 20 Vdc, f = 100 MHz) 2N4123
2N4124
(I
C
= 2.0 mAdc, V
CE
= 10 V, f = 1.0 kHz) 2N4123
(I
C
= 2.0 mAdc, V
CE
= 10 V, f = 1.0 kHz) 2N4124
|h
fe
|
2.5
3.0
50
120
—
—
200
480
—
Noise Figure
(I
C
= 100 µAdc, V
CE
= 5.0 Vdc, R
S
= 1.0 k ohm, 2N4123
f = 1.0 kHz) 2N4124
NF
—
—
6.0
5.0
dB
1. Pulse Test: Pulse Width = 300 s, Duty Cycle = 2.0%.
Figure 1. Capacitance
REVERSE BIAS VOLTAGE (VOLTS)
2.0
3.0
5.0
7.0
10
1.0
0.1
Figure 2. Switching Times
I
C
, COLLECTOR CURRENT (mA)
200
1.0
TIME (ns)
100
50
30
20
70
10.0
5.0
7.0
2.0 3.0 5.0 7.0 10 20 30 50 70 100 200
CAPACITANCE (pF)
1.0 2.0 3.0 5.0 7.0 10 20
30 40
0.2 0.3 0.5 0.7
C
ibo
C
obo
t
s
t
d
t
r
t
f
V
CC
= 3 V
I
C
/I
B
= 10
V
EB(off)
= 0.5 V