C * < 10 pF
S
−2 V
MMBT2222LT1, MMBT2222ALT1
ELECTRICAL CHARACTERISTICS (T = 25°C unless otherwise noted)
A
Characteristic
Symbol
Min
Max
Unit
SMALL−SIGNAL CHARACTERISTICS
Output Admittance
h
oe
mmhos
(I = 1.0 mAdc, V = 10 Vdc, f = 1.0 kHz)
MMBT2222A
MMBT2222A
5.0
25
35
200
C
CE
(I = 10 mAdc, V = 10 Vdc, f = 1.0 kHz)
C
CE
Collector Base Time Constant
rb, C
NF
ps
c
(I = 20 mAdc, V = 20 Vdc, f = 31.8 MHz)
MMBT2222A
−
−
150
4.0
E
CB
Noise Figure
dB
(I = 100 mAdc, V = 10 Vdc, R = 1.0 kW, f = 1.0 kHz) MMBT2222A
C
CE
S
SWITCHING CHARACTERISTICS (MMBT2222A only)
Delay Time
t
t
−
−
−
−
10
25
d
(V = 30 Vdc, V
= −0.5 Vdc,
BE(off)
B1
CC
ns
ns
I
C
= 150 mAdc, I = 15 mAdc)
Rise Time
Storage Time
Fall Time
t
r
225
60
s
(V = 30 Vdc, I = 150 mAdc,
CC
C
I
B1
= I = 15 mAdc)
B2
t
f
3. Pulse Test: Pulse Width v 300 ms, Duty Cycle v 2.0%.
4. f is defined as the frequency at which |h | extrapolates to unity.
T
fe
SWITCHING TIME EQUIVALENT TEST CIRCUITS
+ꢀ30 V
200
+ꢀ30 V
1.0 to 100 ms,
1.0 to 100 ms,
200
+16 V
0
DUTY CYCLE ≈ 2.0%
+16 V
0
DUTY CYCLE ≈ 2.0%
1 k
< 20 ns
1N914
−14 V
1 kW
C * < 10 pF
S
< 2 ns
−ꢀ4 V
Scope rise time < 4 ns
*Total shunt capacitance of test jig, connectors, and oscilloscope.
Figure 1. Turn−On Time
Figure 2. Turn−Off Time
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