SD1898 datasheet(1/4 Pages) STMICROELECTRONICS

Part #	SD1898

Description	RF & MICROWAVE TRANSISTORS 1.6 GHz SATCOM APPLICATIONS

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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1.6 GHz SATCOM APPLICATIONS

RF & MICROWAVE TRANSISTORS

. 400 SQ. 2LFL (M186)

epoxy sealed

.

1.65 GHz

.

28 VOLTS

.

EFFICIENCY 40% MIN.

.

CLASS C OPERATION

.

COMMON BASE

.

POUT

= 32 W MIN. WITH 9 dB GAIN

DESCRIPTION

The SD1898 is a 28 V Class C silicon NPN tran-

sistor designed for INMARSAT and other 1.65 GHz

SATCOM applications. A gold metallized emitter-

ballasted die geometry is employed providing high

gain and efficiency while ensuring long term re-

liability and ruggedness under severe operating

conditions. SD1898 is packaged in a cost-effective

epoxy sealed housing.

PIN CONNECTION

BRANDING

1898

ORDER CODE

SD1898

ABSOLUTE MAXIMUM RATINGS (Tcase

= 25°C)

Symbol

Parameter

Value

Uni t

VCBO

Collector-Base Voltage

45

V

VCEO

Collector-Emitter Voltage

15

V

VEBO

Emitter-Base Voltage

3.5

V

IC

Device Current

7.8

A

PDISS

Power Dissipation

87.5

W

TJ

Junction Temperature

+200

°C

TSTG

Storage Temperature

− 65 to +150

°C

RTH(j-c)

Junction-Case Thermal Resistance

2.0

°C/W

SD1898

1. Collector

3. Emitter

2. Base

4. Base

THERMAL DATA

November 1992

1/4

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