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2N4428
NPN SILICON HIGH FREQUENCY TRANSISTOR
PACKAGE STYLE TO-39
DESCRIPTION:
The 2N4428 is a High Frequency Transistor Designed for Amplifier and Oscillator Applications.
MAXIMUM RATINGS
IC VCE PDISS TJ TSTG θJC
O O
425 mA 30 V 3.5 W @ TC = 25 C -65 C to +200 C -65 C to +200 C 50 C/W
O O O O
1 = EMITTER 2 = BASE 3 = COLLECTOR
NONE
CHARACTERISTICS
SYMBOL
BVCEO BVCER BVEBO ICEX hFE ft COB Pin η IC = 20 mA IC = 20 mA
TC = 25 C
O
TEST CONDITIONS
RBE = 10 Ω VBE = -1.5 V IC = 50 mA IC = 400 mA IC = 50 mA f = 200 MHz f = 1.0 MHz Rs = 50 Ω f = 200 MHz
MINIMUM
35 55 3.5
TYPICAL
MAXIMUM
UNITS
V V V
IC = 100 µA VCE = 55 V VCE = 5.0 V VCE = 20 V VCB = 28 V VCC = 28 V Pout = 750 mW
1.0 20 5.0 700 1000 1.5 3.5 75 35 200
mA --MHz pF mW %
A D V A N C E D S E M I C O N D U C T O R, I N C.
7525 ETHEL AVENUE • NORTH HOLLYWOOD, CA 91605 • (818) 982-1202 • FAX (818) 765-3004
Specifications are subject to change without notice.
REV. A
1/1
.