QST4 Rohm, QST4 Datasheet - Page 2

• Manufacturer Part Number: QST4
• Description: Low frequency amplifier
• Manufacturer: Rohm

Transistors
Type
QST4
Packaging specifications
Electrical characteristic curves
0.001
0.01
1000
0.1
10
100
1
10
0.1
0.001
I
Pulsed
Fig.4 Grounded emitter propagation
C
/I
−
V
Pulsed
BASE TO EMITTER CURRENT : V
125˚C
B
25˚C
CE
=20/1
40˚C
=−2V
25˚C
COLLECTOR CURRENT : I
125˚C
0.01
Fig1. DC current gain
Package
Code
Basic ordering unit (pieces)
charactereistics
vs. collector current
1
−
0.1
40˚C
1
C
(
A)
BE
(V
)
10
10
1000
100
10
0.001
0.01
0.01
0.1
Taping
Fig.2 Collector-emitter saturation voltage
1
0.001
3000
TR
I
Pulsed
C
/I
Fig.5 Gain bandwidth product
B
=20/1
EMITTER CURRENT : I
COLLECTOR CURRENT : I
vs. emitter current
vs. collector current
0.01
0.1
0.1
25˚C
1
125˚C
−
E
40˚C
(A)
Ta=25°C
V
f=100MHz
1
CE
C
=2V
(
A)
10
10
Fig 6. Collector output capacitance vs. collector-base voltage
Emitter input capacitance vs. emitter-base volatage
1000
100
0.1
10
10
1
0.001
0.001
−
I
Pulsed
Fig.3 Base−emitter saturation voltage
125˚C
C
EMITTER TO BASE VOLTAGE : V
COLLECTOR TO BASE VOLTAGE : V
40˚C
/I
Cob
Cib
B
=20/1
COLLECTOR CURRENT : I
0.01
0.01
vs.collector current
25˚C
0.1
Rev.C
0.1
1
10
1
I
f=1MHz
Ta=25
C
C
QST4
=0A
(
EB
A)
(V)
CB
°C
2/2
100
(V)
10