Microsemi

RF Products Division

140 Commerce Drive, Montgomeryville PA 18936, (215) 631-9840, Fax: (215) 631-9855

Page 1

Copyright

 2000

MSC1643.PDF 2000-12-20

SD1224

RF & MICROWAVE TRANSISTORS

R F P R O D UCT S DI VI SI ON

DESCRIP T ION

DESCRIP T ION

DESCRIP T ION

DESCRIP T ION

The SD1224 is an epitaxial silicon NPN planar transistor designed

primarily for 28 V FM Class C RF amplifiers utilized in ground station

transmitters. This device utilizes ballasted emitter resistors and

improved metallization systems to achieve optimum load mismatch

IMPORTANT: For the most current data, consult MICROSEMI’s website: http://www.microsemi.com

KEY FEATURE S

KEY FEATURE S

KEY FEATURE S

KEY FEATURE S

! 175 MHz

! 28 Volts

! Class C

! Common Emitter

! Efficiency 60% Min.

APPLICATIONS/BENEFIT

APPLICATIONS/BENEFIT

APPLICATIONS/BENEFIT

APPLICATIONS/BENEFITS

SS

S

! VHF FM Applications

Symbol

Parameter

Value

Unit

V

CBO

Collector-Base Voltage

65

V

V

CEO

Collector-Emitter Voltage

35

V

V

EBO

Emitter-Base Voltage

4.0

V

I

C

Device Current

5.0

A

P

DISS

Power Dissipation

60

W

T

J

Junction Temperature

+200

°C

T

STG

Storage Temperature

-65 to +150

°C

THERMAL DATA

R

TH(j-c)

Junction-Case Thermal Resistance

2.9

°C/W

epoxy sealed

1

2

3

4

1. Collector

2. Emitter

3. Base

4. Emitter

PIN CONNECTION