1/7July, 3 2002
START405
NPN Silicon RF Transistor
SOT343 (SC70)
ORDER CODE
START405TR BRANDING
405
APPLICATIONS
•LNA FOR GSM/ DCS, DECT, PCS, PCN,
CDMA, W-CDMA
•GENERAL PURPOSE 500MHz -5GHz
•LOW NOISE FIGURE: NFmin = 1.1dB
@ 1.8GHz, 2mA, 2V
•COMPRESSION P1dB = 5dBm
@ 1.8GHz, 5mA, 2V
•TRA NS I TI ON FR E QUENCY 42 GHz
•LOW CURRENT CONSUMPTION
•ULTRA MINIATURE SOT343 PACKAGE
DESCRIPTION
The START405 is a member of the START family
that provide the state of the art of RF si licon 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(BV ceo).
It offers performance level only archi ved with GaAs
products before.
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
Vceo Collector emitter voltage 4.5 V
Vcbo Collector base voltage 15 V
Vebo Emitter base voltage 1.5 V
IcCollector current 10 mA
IbBase current 1 mA
Ptot Total dissipation, Ts = TBD 45 mW
Tstg Storage temperature -65 to 150 oC
TjMax. operating junction temperature 150 oC
Rthjs Thermal Resistance Junction soldering point 270 oC/W
ABSOLUTE MAXIMUM RATINGS
Obsolete Product(s) - Obsolete Product(s)
Obsolete Product(s) - Obsolete Product(s)
START405
2/7
ELECTRICAL CHARACT ERISTICS (Tj=25 oC,unless otherwise specified)
Note(1): Gms = | S21 / S12 |
Symbol Parameter Test Conditions Min. Typ. Max. Unit
Icbo Collector cutoff current Vcb =5V, Ie = 0A 150 nA
Iebo Emitter-base cutoff
current Veb = 1.5V, Ic = 0A 15 µA
Hfe DC current gain Ic = 5mA, Vce = 4V 160
NFmin Minimim noise figure Ic = 2mA, Vce = 2V, f = 1.8GHz 1.1 dB
Ga NFmin associated gain Ic = 2mA, Vce = 2V, f = 1.8GHz 19 dB
|S21|2Insertion power gain Ic = 5mA, Vce = 2V, f = 1.8GHz 17.4 dB
Gms (1) Maximum stable gain Ic = 5mA, Vce = 2V, f = 1.8GHz 24.2 dB
P-1dB 1dB compression point Ic = 5mA,Vce = 2V, f = 1.8GHz 5 dBm
OIP3 Ouput third order
intercept point Ic = 5mA,Vce = 2V, f = 1.8GHz 15 dBm
PINOUT PIN CONNECTION
Pin No. Description
1BASE
3 COLLECTOR
2,4 EMITTER
SOT343
4
12
3
Top vie
w
Obsolete Product(s) - Obsolete Product(s)
3/7
START405
Symbol Value Symbol Value Symbol Value
TMEAS 27.0 FC 0.5 XJBC 0.3
IS 1.9E-17 EG 1.12 XTI 3.57
ISE 1.58E-13 NF 1 BF 340
NR 1 NE 2.711 VAF 79
ISC 7.40E-17 BR 8.59 VAR 2.35
IKF {0.151*((T(oC)+273.15)/
300.15)^(-1.774)} NC 1.312 TF 4.1E-12
TR 7E-10 PTF 38 VTF 14.7
XTF 42 ITF 0.42 MJE 0.414
RB 34.07 RBM 6.1 MJC 0.266
RC 7.9 RE 1.25 MJS 0.22
CJE 111E-15 VJE 1.1 IKR 2.29E-3
CJC 53E-15 VJC 0.69 XTB -0.744
CJS 33E-15 VJS 0.4
SPICE PARAM ETERS (G ummel-Poon Model, Berkley-SPICE 2G.6 Syntax)
PACKAGE EQUIVALENT CIR CUIT
TRANSIS T OR CHIP DATA
FOR MORE ACCURACY SIM ULATION IN SATURATION REGION :
Adding the 5 Spice parameters showed in T able A and using ST Spice Library (available on request ) you
can achieve a m ore 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 2.045 {8.67*((TEMPER+273.15)/300.15)^(0.839)} 1.00E-6
In order to avoid hi gh compl ex ity of the package equivalent circuit, the two emitter leads of SOT-343
package are comb ined in one electrical connec tion.
C
Transistor
Chip
B’ C’
E’
L=0.3 nH L=0.6 nH
L3 L5 L6
C2
C=5 fF
..
L=0.35 nH
L1 L=0. 3 nH
L=0.15 nHL2
C = 300 fFC=430 fF
C1 C3
E
.
.
L=0. 6 nH
L4
B.
.C
Transistor
Chip
B’ C’
E’
L=0.3 nH L=0.6 nH
L3 L5 L6
C2
C=5 fF
..
L=0.35 nH
L1 L=0. 3 nH
L=0.15 nHL2
C = 300 fFC=430 fF
C1 C3
E
.
.
L=0. 6 nH
L4
B.
.
Obsolete Product(s) - Obsolete Product(s)
START405
4/7
COMM ON EMITTER S-PARAMETERS ( VCE = 2 V, IC = 5mA )
FREQ IS11IIS
21IIS
12IS
12∠Φ IS22IS
22∠Φ
(MHz)
0.1 0.903 -5 12.29 176 0.007 95 0.991 -2
0.5 0.882 -23 10.96 174 0.014 97 0.971 -11
0.9 0.825 -38 9.71 174 0.021 98 0.918 -19
10.809 -41 9.42 175 0.022 99 0.906 -20
1.5 0.713 -53 8.11 177 0.027 107 0.850 -24
1.8 0.674 -58 7.43 180 0.028 114 0.829 -27
20.642 -61 6.99 178 0.028 122 0.820 -28
2.5 0.579 -64 6.01 172 0.028 148 0.815 -30
30.523 -64 5.12 164 0.030 175 0.815 -31
3.5 0.462 -67 4.31 156 0.039 131 0.787 -35
40.372 -78 3.48 146 0.065 94 0.644 -41
S
11
∠Φ S
21
∠Φ
Obsolete Product(s) - Obsolete Product(s)
5/7
START405
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) 4.0 4.2 (cumulative 10 Po)
P 4.0
DEVICE ORIENTATION
TOP VIEW END VIEW
405 405 405 405
Obsolete Product(s) - Obsolete Product(s)
START405
6/7
PACKAGE DIMENSIONS SOT343 (SC-70 4 le ads)
2.00-2.20
1.90-2.10
1.15-1.35
1.15
0.55-0.65
1.30
0.25-0.35 0.00-0.10
0.80-1.00
1.15-1.35
0.10-0.20
0.45
Obsolete Product(s) - Obsolete Product(s)
7/7
START405
Info rm atio n furnished i s believ ed to be accu rate and reli able. However, STMicro el ectronics as sumes no responsibility f or the cons equences
of use of such information nor for any infringement of patents or other rights of third parties which may result from it s use. No license is granted
by i m pl i cation or otherwise under a ny paten t or patent ri ghts of S T M i croel ectron i cs. Specification s menti oned in this publ ication are subject
to change wit hout notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products a re not
authorized for use as crit i cal comp onents in l i fe support dev i ces or syst em s without express written approv al of S T M i croel ectronics.
The ST l ogo is registered tr ademark of STMi croel ectronics
2002 ST M i croel ectronics - All Right s Reserved
All other names are the proper ty of t heir respec ti ve owners.
STMic roelect ron i cs GROUP OF COMPANIES
Aust ralia - B razil - Canad a - China - Fi nland - Fran ce - Germany - Hong Kong - India - Israel - It al y - Japan -
Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A.
htt
p
://www.st.com
