UHF TV/LINEAR APPLICATIONS
RF & MICROWAVE TRANSISTORS
.280 4L STUD (M122)
epoxy sealed
.
860 MHz
.
25 VOLTS
.
COMMON EMITTER
.
GOLD METALLIZATION
.
CLASS A LINEAR OPERATION
.
P
OUT
=
4.0 W MIN. WITH 7.0 dB GAIN
DESCRIPTION
The SD1448 is a silicon NPN bipolar device spe-
cifically designed for high linearity applications in
the UHF frequency range including TV Bands IV
and V.
Gold metallization and emitter ballasting assure
high reliability under Class A linear amplifier oper-
ation.
PIN CONNECTION
BRANDING
TCC598
ORDER CODE
SD1448
ABSOLUTE MAXIMUM RATINGS (T
case
=
25
C)
Symbol
Parameter
Value
Uni t
V
CBO
Collector-Base Voltage
45
V
V
CEO
Collector-Emitter Voltage
25
V
V
EBO
Emitter-Base Voltage
4
V
I
C
Device Current
1.6
A
P
DISS
Power Dissipation
31.8
W
T
J
Junction Temperature
+200
C
T
STG
Storage Temperature
-
65 to +150
C
R
TH(j-c)
Junction-Case Thermal Resistance
5.5
C/W
SD1448 (TCC598)
1. Collector
3. Base
2. Emitter
4. Emitter
THERMAL DATA
November 1992
1/6
TEST CIRCUIT
C1
: 22mF, 63V Sprague
C2, C6,
C8, C15
: 4.7nF Chip LCC
C3, C7, C9,
C11, C16 : 100nF Chip LCC
C4, C10
: 4.7
F, 40V Sprague
C5, C15
: 4.7
F, 63V Sprague
C12, C17,
C18
: 470pF Chip LCC
C13, C25 : 47pF ATC 100B
C19
: 47pF ATC 100A
C20
: 0.5 - 4.5pF Adjustable Airtronic
C21, C24 : 0.8 - 5pF Adjustable Johanson
C22
: 10pF ATC 100A
C23
: 15pF ATC 100B
D1
: 1N 4001 or 1N 914
L1
: 50
Transmission Line, Length 18mm
L2
: 50
Transmission Line, Length 22mm
L3
: 16.4
Transmission Line, Length 12mm
L'3
: 10.5
Transmission Line, Length 3.5mm
L4
: 20
Transmission Line, Length 13mm
L5
: 50
Transmission Line, Length 2.5mm
L6
: 20
Transmission Line, Length 23mm
L7
: 4
Transmission Line, Length 8%
at 860 MHz
L8
: 55
Transmission Line, Length 7.5%
at 860 MHz
L9
: 7.5
Transmission Line, Length 8%
at 860 MHz
L10
: 100
Transmission Line, Length 8%
at 860 MHz
L11
: 20
Transmission Line, Length 8%
at 860 MHz
L12
: 50
Transmission Line, Length 5mm
L13
: 50
Transmission Line, Length 12mm
P1
: 3.3k
Adjustable
R1
: 2.2
, 3W SFERNICE
R2
: 100
, 1/2W
R3
: 51
, 1/2W
R4, R6 : 100
, 1/2W
R5, R7 : 56
, 1W
T1
: BDX 54 B
S1
: 6 Turns, Wire Diameter 0.5mm on 2.5mm Internal
Diameter
S2
: 10 to 12 Turns on R6, Wire Diameter 0.5mm
PC Board
Material
: Er
=
2.5, .020" Thick
SD1448 (TCC598)
4/6
PACKAGE MECHANICAL DATA
Ref.: Dwg. No.12-0122
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsability for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No
license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned
in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied.
SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express
written approval of SGS-THOMSON Microelectonics.
1994 SGS-THOMSON Microelectronics - All Rights Reserved
SGS-THOMSON Microelectronics GROUP OF COMPANIES
Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands -
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SD1448 (TCC598)
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