A D V A N C E D S E M I C O N D U C T O R, I N C. REV. A
7525 ETHEL AVENUE • NORTH HOLLYWOOD, CA 91605 • (818) 982-1202 • FAX (818) 765-3004 1/1
Specif i cations are subj ect to change wi thout notice.
CHARACTERISTICS TC = 25 OC
NONE
SYMBOL TEST CONDITIONS MINI MUM TYPICAL MAXIMUM UNITS
BVCEO IC = 20 mA 35 V
BVCER IC = 20 mA RBE = 10 Ω55 V
BVEBO IC = 100 µA3.5 V
ICEX VCE = 55 V VBE = -1.5 V 1.0 mA
hFE VCE = 5.0 V IC = 50 mA
IC = 400 mA 20
5.0 200 ---
ftVCE = 20 V IC = 50 mA f = 200 MHz 700 1000 MHz
COB VCB = 28 V f = 1.0 MHz 1.5 3.5 pF
Pin
η
ηη
ηVCC = 28 V f = 200 MHz
Pout = 750 mW Rs = 50 Ω35 75 mW
%
NPN SILICON HIGH FREQUENCY TRANSISTOR
2N4428
PACKAGE STYLE TO-39
1 = EMITTER 2 = BASE
3 = COLLECTOR
DESCRIPTION:
The 2N4428 is a Hig h Fr equency
Transist or Designed for Amplifier and
Oscillator Applications.
MAXIMUM RATINGS
IC425 mA
VCE 30 V
PDISS 3.5 W @ T C = 25 OC
TJ-65 OC to +200 OC
TSTG -65 OC to +200 OC
θ
θθ
θJC 50 OC/W
