©
1996
DATA SHEET
SILICON TRANSISTOR
2SC4185
DESCRIPTION
The 2SC4185 is an NPN silicon epitaxial transistor intended for use
as a UHF oscillator and a mixer in a tuner of a TV receiver. The device
features stable oscillation and small frequency drift against any change
of the supply voltage and the ambient temperature.
It is designed for use in small type equipments especially recom-
mended for Hybrid Integrated Circuit and other applications.
FEATURES
• Low Noise
• High Conversion Gain
• Easy & economical mounting realizable with plastic mold package for
Hybrid IC.
ABSOLUTE MAXIMUM RATINGS (TA = 25 ˚C)
Collector to Base Voltage VCB0 30 V
Collector to Emitter Voltage V
CE0 14 V
Emitter to Base Voltage V
EB0 3.0 V
Collector Current I
C 50 mA
Total Power Dissipation P
T 160 mW
Junction Temperature T
j 150 ˚C
Storage Temperature T
stg –65 to +150 ˚C
ELECTRICAL CHARACTERISTICS (TA = 25 ˚C)
Characteristics Symbol MIN. TYP. MAX. Unit Test Conditions
Collector Cutoff Current ICB0 0.1
µ
AVCB = 15 V, IE = 0
DC Current Gain hFE 40 100 180
VCE = 10 V, IC = 5 mA
Gain Bandwidth Product fT 1.5 2.0 GHz
VCE = 10 V, IC = 5 mA, f = 1 GHz
Output Capacitance Cob 1.0 1.3 pF VCB = 10 V, IE = 0, f = 1 MHz
hFE Classifications
Rank U21 U22 U23
Marking U21 U22 U23
hFE 40 to 80 60 to 120 90 to 180
Document No. P11190EJ2V0DS00 (2nd edition)
Date Published February 1996 P
Printed in Japan
PACKAGE DIMENSIONS
in millimeters
UHF OSCILLATOR AND VHF MIXER
NPN SILICON EPITAXIAL TRANSISTOR
SUPER MINI MOLD
2.1 ± 0.1
1.25 ± 0.1
2
1
3
2.0 ± 0.2
0.3
+0.1
–0
0.65
0.65
0.3
+0.1
–0
0.15
+0.1
–0.05
0 to 0.1
0.3
0.9 ± 0.1
Marking
PIN CONNECTIONS
1. Emitter
2. Base
3. Collector
