Fairchild KSC2757, KSC2757 Schematic [ru]
KSC2757
Mixer Oscillator for VHF Tuner
• High Current Gain Bandwidth Product : fT=1100MHz (TYP)
NPN Epitaxial Silicon Transistor
3
2
1
SOT-23
1. Base 2. Emitter 3. Collector
KSC2757
Absolute Maximum Ratings
Symbol Parameter Value Units
V
V
V
I
P
T
T
CBO
CEO
EBO
C
C
J
STG
Collector-Base Voltage 30 V
Collector-Emitter Voltage 15 V
Emitter-Base Voltage 5 V
Collector Current 50 mA
Collector Power Dissipation 150 mW
Junction Temperature 150 °C
Storage Temperature -55 ~ +150 °C
Electrical Characteristics
Symbol Parameter Test Condition Min. Typ. Max. Units
I
CBO
h
FE
V
(sat) Collector-Emitter Saturation Voltage IC=10mA, IB=1mA 0.5 V
CE
f
T
C
ob
C
c·rbb’
Collector Cut-off Current VCB=12V, IE=0 0.1 µA
DC Current Gain VCE=10V, IC=5mA 60 120 240
Current Gain Bandwidth Product VCE=10V, IC=5mA 800 1100 MHz
Output Capacitance VCB=10V, IE=0, f=1MHz 1.5 pF
Noise Figure VCE=10V, IC=5mA
Ta=25°C unless otherwise noted
Ta=25°C unless otherwise noted
10 1.5 ps
f=31.9MHz
hFE Classification
Classification R O Y
h
FE
60 ~ 120 90 ~ 180 120 ~ 240
Marking
H3O
hFE grade
©2002 Fairchild Semiconductor Corporation Rev. A2, September 2002
Typical Characteristics
KSC2757
20
16
12
8
4
[mA], COLLECTOR CURRENT
C
I
0
0 5 10 15 20 25
IB = 180µA
IB = 160µA
IB = 140µA
IB = 120µA
IB = 100µA
IB = 80µA
VCE[V], COLLECTOR-EMITTER VOLTAGE
IB = 60µA
IB = 40µA
IB = 20µA
1000
100
10
, DC CURRENT GAIN
FE
h
1
0.1 1 10 100
IC [mA], COLLECTOR CURRENT
Figure 1. Static Characteristics Figure 2. DC Current Gain
1000
IC = 10 I
B
100
10000
1000
VCE = 10V
IC = 10 I
B
(sat)[mV], SATURATION VOLTAGE
CE
V
10
0.1 1 10 100
IC [mA], COLLECTOR CURRENT
(sat)[mV], SATURATION VOLTAGE
BE
V
100
0.1 1 10 100
IC [mA], COLLECTOR CURRENT
Figure 3. Collector-Emitter Saturation Voltage Figure 4. Base-Emitter Saturation Voltage
10000
1000
100
10
0.1 1 10 100
[MHz], CURRENT GAIN BANDWIDTH PRODUCT
T
f
IC [mA], COLLECTOR CURRENT
Figure 5. f
- I
T
C
VCE = 10V
100
10
1
[pF], OUTPUT CAPACITANCE
ob
C
0.1
0.1 1 10 100
VCB[V], COLLECTOR-BASE VOLTAGE
Figure 6. Output Capacit a nc e
f = 1MHz
I
=0
E
©2002 Fairchild Semiconductor Corporation
Rev. A2, September 2002
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