START450
NPN Silicon RF Transistor
• COMPRESSION POINT P1dB=19dBm @ 1.8GHz
• TRANSITION FREQUENCY 42GHz
• HIGH LINEARITY
• ULTRA MINIATURE SOT343(SC70) PACKAGE
SOT343 (SC70)
ORDER CODE
START450TR
DESCRIPTION
The START450 is a member of the START family that
provide the state of the art of RF silicon process to the
market. Manufacturated in the third generation of ST
proprietary bipolar process, it offers the best mix of
gain and NF for given breakdown voltage(BVceo).
It offers performance level only archived with GaAs
products before.
BRANDING
450
APPLICATIONS
• LNA FOR GSM/DCS, DECT, PCS, PCN,
CDMA, W-CDMA
• PREDRIVER FOR DECT
• GENERAL PURPOSE 500MHz-5GHz
ABSOLUTE MAXIMUM RATINGS
Symbol
Vceo
Vcbo
Vebo
Parameter
Value
Unit
Collector emitter voltage
4.5
V
Collector base voltage
15
V
Emitter base voltage
1.5
V
Ic
Collector current
100
mA
Ib
Base current
10
mA
Ptot
Total dissipation, Ts = TBD
450
mW
Tstg
Storage temperature
-65 to 150
oC
150
oC
Tj
Max. operating junction temperature
ABSOLUTE MAXIMUM RATINGS
Rthjs
Thermal Resistance Junction soldering point
November, 20 2002
MAX
≤ 120
o
C/W
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START450
ELECTRICAL CHARACTERISTICS (Tj=25 oC,unless otherwise specified)
Symbol
Parameter
Test Conditions
Icbo
Collector cutoff current
Iebo
Emitter-base cutoff
current
Hfe
DC current gain
Ic = 50mA, Vce = 4V
160
NFmin
Minimim noise figure
Ic = 10mA, Vce = 2V, f = 1.8GHz,
Zs = Zsopt
1.2
dB
Ga
NFmin associated gain
Ic = 10mA, Vce = 2V, f = 1.8GHz
13
dB
Insertion power gain
Ic = 50mA, Vce = 2V, f = 1.8GHz
13.7
dB
|S21|2
(1)
Min.
Typ.
Max.
Unit
Vcb = 5V, Ie = 0A
150
nA
Veb = 1.5V, Ic = 0A
15
µA
Maximum stable gain
Ic = 50mA, Vce = 2V, f = 1.8GHz
19.1
dB
P-1dB
1dB compression point
Ic = 50mA,Vce = 3V, f = 1.8GHz
19
dBm
OIP3
Ouput third order
intercept point
Ic = 50mA,Vce = 3V, f = 1.8GHz
29
dBm
Gms
Note(1): Gms = | S 21 / S12 |
PIN CONNECTION
PINOUT
4
3
Top view
1
2
SOT343
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Pin No.
Description
1
BASE
3
COLLECTOR
2,4
EMITTER
START450
SPICE PARAMETERS (Gummel-Poon Model, Berkley-SPICE 2G.6 Syntax)
TRANSISTOR CHIP DATA
Symbol
Value
Symbol
Value
Symbol
Value
TMEAS
27.0
FC
0.8
XJBC
0.3
IS
1.9E-16
EG
1.12
XTI
4.51
ISE
1.9E-12
NF
1
BF
295
NR
1
NE
2.658
VAF
40
ISC
3.19E-15
BR
13.7
VAR
2.5
IKF
{1.448*((T(oC)+273.15)/
300.15)^(-1.6)}
NC
1.5
TF
3.1E-12
TR
7E-10
PTF
35
VTF
27
XTF
20
ITF
4.8
MJE
0.44
RB
2.7
RBM
0.64
MJC
0.31
RC
1.38
RE
0.15
MJS
0.281
CJE
1462E-15
VJE
1.1
IKR
43.5E-3
CJC
660E-15
VJC
0.84
XTB
-0.32
CJS
425E-15
VJS
0.453
PACKAGE EQUIVALENT CIRCUIT
C2
C=21 fF
B
.
L4
L=0.3 nH
.
L3
B’
L=0.8 nH
Transistor
Chip
C’
L5
L=0.1 nH
.
L6
L=0.3 nH
.
C
E’
L=0.15 nH
L1
.
C1
C=740 fF
L2
C3
C=785 fF
L=0.05 nH
.
E
In order to avoid high complexity of the package equivalent circuit, the two emitter leads of SOT-343
package are combined in one electrical connection.
FOR MORE ACCURACY SIMULATION IN SATURATION REGION :
Adding the 5 Spice parameters showed in Table A and using ST Spice Library (available on request) you
can achieve a more accuracy simulation in the saturation region. ST Spice library is compatible with
following simulators: ELDO MENTOR (any version), SPECTRE CADENCE (any version), ADS (version
2001 only).
Table A (Spice Parameters extracted in saturation region)
RW
Vjj
ENP
VRP
RP
2.594
0.769
2.45
{4.64*((TEMPER+273.15)/300.15)^(1.5)}
1.00E-6
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START450
COMMON EMITTER S-PARAMETERS ( VCE = 2V, IC = 50mA )
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FREQ
IS11I
S11∠Φ
(MHz)
0.1
0.5
0.9
1
1.5
1.8
2
2.5
3
3.5
4
0.572
0.740
0.747
0.744
0.726
0.715
0.699
0.646
0.582
0.523
0.441
-112
-167
-178
179
172
167
165
158
153
150
153
IS21I
61.291
17.769
9.937
8.736
5.913
4.893
4.484
3.661
2.879
2.195
1.733
S21∠Φ
IS12I
S12∠Φ
IS22I
S22∠Φ
137
111
113
114
125
128
131
139
146
154
175
0.017
0.022
0.026
0.025
0.059
0.060
0.086
0.128
0.145
0.189
0.211
50
60
93
103
146
157
163
172
177
170
151
0.723
0.545
0.539
0.534
0.526
0.520
0.510
0.481
0.452
0.449
0.381
-75
-149
-163
-166
-171
-173
-175
-174
-173
-173
-178
START450
TAPE & REEL DIMENSIONS
mm
MIN.
TYP.
MAX
A
178.5
179
179.5
C
12.8
13.0
13.5
D
20.2
N
54.5
55
55.5
T
14.4
Ao
2.25
Bo
2.7
Ko
1.2
Po
3.8 (cumulative 10 Po)
P
4.0
4.2 (cumulative 10 Po)
4.0
DEVICE ORIENTATION
TOP VIEW
450
450
450
END VIEW
450
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START450
PACKAGE DIMENSIONS SOT343 (SC-70 4 leads)
1.30
1.15-1.35
2.00-2.20
1.15
0.55-0.65
1.90-2.10
1.15-1.35
0.80-1.00
0.25-0.35
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0.00-0.10
0.45
0.10-0.20
START450
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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2002 STMicroelectronics - All Rights Reserved
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