Datasheet
Electrical Characteristics (Cont’d): (T
A
= 25°C unless otherwise specified)
Parameter Symbol Test Conditions Min Typ Max Unit
ON Characteristics (Cont’d)
Base–Emitter Saturation Voltage
NTE123A
V
BE(sat)
I
C
= 150mA, I
B
= 15mA, Note 1
0.6 – 1.2 V
I
C
= 500mA, I
B
= 50mA, Note 1 – – 2.0 V
NTE159M I
C
= 150mA, I
B
= 15mA, Note 1 – – 1.3 V
I
C
= 500mA, I
B
= 50mA – – 2.6 V
Small–Signal Characteristics
Current Gain–Bandwidth Product
NTE123A
f
T
I
C
= 20mA
V
CE
= 20V, f = 100MHz,
300 – – MHz
NTE159M I
C
= 50mA
Note 2
200 – – MHz
Output Capacitance C
obo
V
CB
= 10V, I
E
= 0, f = 100kHz – – 8 pF
Input Capactiance
NTE123A
C
ibo
V
BE
= 0.5V
I
C
= 0, f = 100kHz
– – 25 pF
NTE159M V
BE
= 2V – – 30 pF
Input Impedance (NTE123A Only) h
ie
I
C
= 1mA V
CE
= 10V, f = 1kHz 2.0 – 8.0
kΩ
I
C
= 10mA 0.25 – 1.25 kΩ
Voltage Feedback Ratio
h
re
I
C
= 1mA V
CE
= 10V, f = 1kHz – – 8 x 10
–4
(NTE123A Only)
I
C
= 10mA – – 4 x 10
–4
Small–Signal Current Gain
h
fe
I
C
= 1mA V
CE
= 10V, f = 1kHz 50 – 300
(NTE123A Only)
I
C
= 10mA 75 – 375
Output Admittance (NTE123A Only) h
oe
I
C
= 1mA V
CE
= 10V, f = 1kHz 5 – 35 µmhos
I
C
= 10mA 25 – 200 µmhos
Collector–Base Time Constant
(NTE123A Only)
rb′C
c
I
E
= 20mA, V
CB
= 20V, f = 31.8MHz
– – 150 ps
Noise Figure (NTE123A Only) NF I
C
= 100µA, V
CE
= 10V, R
S
= 1kΩ,
f = 1kHz
– – 4 dB
Real Part of Common–Emitter High
Frequency Input Impedance
(NTE123A Only)
Re(h
ie
) I
C
= 20mA, V
CE
= 20V, f = 300MHz – – 60 Ω
Switching Characteristics
NTE123A
Delay Time
t
d
V
CC
= 30V, V
BE(off)
= 500mV,
– – 10 ns
Rise Time t
r
I
C
= 150mA, I
B1
=– 15mA
– – 25 ns
Storage Time t
s
V
CC
= 30V, I
C
= 150mA,
– – 225 ns
Fall Time t
f
I
B1
= I
B2
= 15mA
– – 60 ns
NTE159M
Turn–On Time
t
on
V
CC
= 30V, I
C
= 150mA,
– 26 45 ns
Delay Time t
d
I
B1
= 15mA
– 6 10 ns
Rise Time t
r
– 20 40 ns
Turn–Off Time t
off
V
CC
= 6V, I
C
= 150mA,
– 70 100 ns
Storage Time t
s
I
B1
= I
B2
= 15mA
– 50 80 ns
Fall Time t
f
– 20 30 ns
Note 1. Pulse Test: Pulse Width ≤ 300µs, Duty Cycle ≤ 2%.
Note 2. f
T
is defined as the frequency at which |h
fe
| extrapolates to unity.