1. Product profile
1.1 General description
400 W LDMOS power transistor for S-band radar applications in the frequency range from
2.7 GHz to 3.1 GHz.
[1] at 1 dB gain compression.
[2] at 2 dB gain compression.
1.2 Features and benefits
High efficiency
Excellent ruggedness
Designed for S-band operation
Excellent thermal stability
Easy power control
Integrated dual sided ESD protection enables excellent off-state isolation
High flexibility with respect to pulse formats
Internally matched for ease of use
Compliant to Directive 2002/95/EC, regarding Restriction of Hazardous Substances
(RoHS)
1.3 Applications
S-band radar applications in the frequent range 2.7 GHz to 3.1 GHz
BLS8G2731L-400P;
BLS8G2731LS-400P
LDMOS S-band radar power transistor
Rev. 2 — 1 September 2015 Product data sheet
Table 1. Typical performance
Typical RF performance at Tcase =25
C; tp = 50
s;
= 2 %; IDq = 200 mA; in a class-AB demo test
circuit.
Test signal f VDS PL(1dB) Gp [1] D [1] PL(2dB) Gp [2] D [2]
(GHz) (V) (W) (dB) (%) (W) (dB) (%)
pulsed RF 2.7 to 2.9 32 540 11 45 610 10 46
2.9 to 3.1 32 490 12 47 550 11 49
2.7 to 3.1 32 530 12 45 590 11 47
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Product data sheet Rev. 2 — 1 September 2015 2 of 13
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
2. Pinning information
[1] Connected to flange.
3. Ordering information
4. Limiting values
[1] Continuous use at maximum temperature will affect the reliability. For details refer to the on-line MTF
calculator.
Table 2. Pinning
Pin Description Simplified outline Graphic symbol
BLS8G2731L-400P (SOT539A)
1drain1
2drain2
3gate1
4gate2
5source [1]
BLS8G2731LS-400P (SOT539B)
1drain1
2drain2
3gate1
4gate2
5source [1]
5
12
43
4
3
5
1
2
sym117
5
12
43
4
3
5
1
2
sym117
Table 3. Ordering information
Type number Package
Name Description Version
BLS8G2731L-400P - flanged balanced ceramic package; 2 mounting holes;
4 leads
SOT539A
BLS8G2731LS-400P - earless flanged balanced ceramic package; 4 leads SOT539B
Table 4. Limiting values
In accordance with the Absolute Maximum Rating System (IEC 60134).
Symbol Parameter Min Max Unit
VDS drain-source voltage - 65 V
VGS gate-source voltage 6+11V
Tstg storage temperature 65 +150 C
Tjjunction temperature [1] - 225 C
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Product data sheet Rev. 2 — 1 September 2015 3 of 13
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
5. Thermal characteristics
6. Characteristics
Table 5. Thermal characteristics
Symbol Parameter Conditions Typ Unit
Zth(j-mb) transient thermal impedance from junction
to mounting base
Tcase =85C; PL=400W
tp=100s; = 10 % 0.067 K/W
tp=200s; = 10 % 0.083 K/W
tp=300s; = 10 % 0.091 K/W
tp=100s; = 20 % 0.082 K/W
Table 6. DC characteristics
Tj=25
C unless otherwise specified.
Symbol Parameter Conditions Min Typ Max Unit
V(BR)DSS drain-source breakdown
voltage
VGS =0V; I
D=3mA 65 - - V
VGS(th) gate-source threshold voltage VDS =10 V; I
D= 300 mA 1.5 1.9 2.3 V
IDSS drain leakage current VGS =0V; V
DS =28V - - 2.8 A
IDSX drain cut-off current VGS =V
GS(th) +3.75 V;
VDS =10V
-51-A
IGSS gate leakage current VGS =11V; V
DS = 0 V - - 280 nA
gfs forward transconductance VDS =10V; I
D= 15.0 A - 21 - S
RDS(on) drain-source on-state
resistance
VGS =V
GS(th) + 3.75 V;
ID=10.5A
- 0.058 -
Table 7. RF characteristics
Test signal: pulsed RF; f = 3.1 GHz; tp = 300
s;
= 10 %; RF performance at VDS =32V;
IDq = 200 mA; Tcase =25
C; unless otherwise specified, in a class-AB narrow band production
circuit.
Symbol Parameter Conditions Min Typ Max Unit
Gppower gain PL= 400 W 10.3 13 - dB
Ddrain efficiency PL= 400 W 43 47 - %
RLin input return loss PL= 400 W - 8- dB
Pdroop(pulse) pulse droop power PL= 400 W - 0 0.5 dB
trrise time PL= 400 W - 5 50 ns
tffall time PL= 400 W - 5 50 ns
PL(2dB) output power at 2 dB gain compression 400 - - W
BLS8G2731L-400P_LS-400P#2 All information provided in this document is subject to legal disclaimers. © Ampleon The Netherlands B.V. 2015. All rights reserved.
Product data sheet Rev. 2 — 1 September 2015 4 of 13
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
7. Test information
7.1 Ruggedness in class-AB operation
The BLS8G2731L-400P and BLS8G2731LS-400P are capable of withstanding a load
mismatch corresponding to VSWR = 10 : 1 through all phases under the following
conditions: VDS =32V; I
Dq = 200 mA; PL=400W; t
p = 300 s; = 10 %.
7.2 Impedance information
[1] Impedances are taken at a single halve of the push-pull transistor
Table 8. Typical impedance
f ZS[1] ZL[1]
(GHz) () ()
2.7 1.0 7.0j 1.8 4.9j
2.9 1.5 8.5j 2.5 5.2j
3.1 4.0 9.0j 3.6 4.7j
Fig 1. Definition of transistor impedance
001aak544
gate 1
gate 2
drain 2
drain 1
Z
S
Z
L
BLS8G2731L-400P_LS-400P#2 All information provided in this document is subject to legal disclaimers. © Ampleon The Netherlands B.V. 2015. All rights reserved.
Product data sheet Rev. 2 — 1 September 2015 5 of 13
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
7.3 Test circuit
Printed-Circuit Board (PCB): Rogers RO3003; thickness = 0.508 mm.
See Table 9 for a list of components.
Fig 2. Component layout for class-AB production test circuit
aaa-016996
PCB0134 REV 0 INPUT
BLS8G2731-400 2.7-3.1 GHz
20R 3003 1ozCu
PCB0134 REV 0 OUTPUT
BLS8G2731-400 2.7-3.1 GHz
20R 3003 1ozCu
71.12 mm
76.2 mm
71.12 mm
Q1 Quad-2
R1
C1 C25
C26
R9
C2
C12
R3
C8
R6
R5
R4
Q2
C11
C13
C14 C16
C23
C24
C17
R7
C15
C18
C19 C21
C22
R8
C20
R2
C4
C6
C3
C5
C7
C9
C10
Quad-1
Table 9. List of components
For test circuit see Figure 2.
Component Description Value Remarks
C1, C2 multilayer ceramic chip capacitor 5.6 pF ATC: ATC600F5R6
C3, C10 multilayer ceramic chip capacitor 220 pF, 50 V Murata: GRM2165C1H221JA01D
C4, C9 multilayer ceramic chip capacitor 10 nF, 50 V Murata: GRM216R71H103KA01D
C5, C8 multilayer ceramic chip capacitor 100 nF, 50 V Murata: GRM21BR71H104KA01L
C6, C7 multilayer ceramic chip capacitor 10 F, 10 V Murata: GRM21BR61A106KE19L
C11, C12 multilayer ceramic chip capacitor 15 pF ATC: ATC600F150
C13, C14, C18, C19, C25, C26 multilayer ceramic chip capacitor 22 pF Passive Plus: 1111N220GW501
C15, C20 electrolytic capacitor 560 pF Passive Plus: 1111N561GW501
C16, C21 multilayer ceramic chip capacitor 0.01 F, 250 V Murata: GRM31B7U2E103JW31L
C17,C22 multilayer ceramic chip capacitor 0.1 F, 250 V Murata: GRM32DR72E104KW01L
C23, C24 electrolytic capacitor 470 F, 63 V Panasonic: EEV-TG1J471M
R1, R9 resistor 50 EMC: SMT2010TALN
R2, R3 shunt resistor 9.1 Vishay Dale: CRCW08059R10FKEA
R4, R6 shunt resistor 5.1 Vishay Dale: CRCW08055R10FKEA
R5 shunt resistor 510 Vishay Dale:
CRCW2010510RFKEFHP
R7, R8 resistor 0.01 Susumu: RL7520WT-R010-F
BLS8G2731L-400P_LS-400P#2 All information provided in this document is subject to legal disclaimers. © Ampleon The Netherlands B.V. 2015. All rights reserved.
Product data sheet Rev. 2 — 1 September 2015 6 of 13
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
7.4 Graphical data
Q1 transistor - Ampleon: BLS8G2731LS-400P
Q2 transistor - NXP: MMBT2222A
Quad-1, Quad-2 90 degree hybrid coupler - Innovative Power Products: IPP-7075
Table 9. List of components …continued
For test circuit see Figure 2.
Component Description Value Remarks
VDS = 32 V; IDq = 200 mA; tp= 100 s; =2%.
(1) f = 2700 MHz
(2) f = 2900 MHz
(3) f = 3100 MHz
VDS = 32 V; IDq = 200 mA; tp= 100 s; =2%.
(1) f = 2700 MHz
(2) f = 2900 MHz
(3) f = 3100 MHz
Fig 3. Power gain and drain efficiency as function of
output power; typical values
Fig 4. Output power as a function of input power;
typical values
aaa-016843
0 100 200 300 400 500 600 700
010
420
830
12 40
16 50
PL (W)
Gp
Gp
(dB)(dB)(dB)
ηD
ηD
(%)(%)(%)
(1)(1)(1)
(2)(2)(2)
(3)(3)(3)
(1)(1)(1)
(2)(2)(2)
(3)(3)(3)
Gp
Gp
ηD
ηD
aaa-016844
0 10 20 30 40 50 60 70 80
0
200
400
600
800
Pi (W)
PL
PL
(W)(W)(W)
(1)(1)(1)
(2)(2)(2)
(3)(3)(3)
BLS8G2731L-400P_LS-400P#2 All information provided in this document is subject to legal disclaimers. © Ampleon The Netherlands B.V. 2015. All rights reserved.
Product data sheet Rev. 2 — 1 September 2015 7 of 13
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
VDS = 32 V; IDq = 200 mA; Pi= 10 dBm.
Fig 5. Input return loss as a function of frequency; typical values
aaa-016845
2650 2750 2850 2950 3050 3150
-30
-25
-20
-15
-10
-5
0
f (MHz)
RL
RLinin
RLin
(dB)(dB)(dB)
BLS8G2731L-400P_LS-400P#2 All information provided in this document is subject to legal disclaimers. © Ampleon The Netherlands B.V. 2015. All rights reserved.
Product data sheet Rev. 2 — 1 September 2015 8 of 13
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
8. Package outline
Fig 6. Package outline SOT539A
REFERENCES
OUTLINE
VERSION
EUROPEAN
PROJECTION ISSUE DATE
IEC JEDEC EIAJ
SOT539A 12-05-02
10-02-02
0 5 10 mm
scale
p
A
F
b
e
D
U2
L
H
Q
c
5
12
43
D1
E
A
w1AB
M M M
q
U1
H1
C
B
M M
w2C
E1
M
w3
UNIT A
mm
Db
11.81
11.56
0.18
0.10
31.55
30.94 13.72 9.53
9.27
17.12
16.10
10.29
10.03
4.7
4.2
ce U2
0.25 0.51
w3
35.56
qw
2
w1
F
1.75
1.50
U1
41.28
41.02
H1
25.53
25.27
p
3.30
3.05
Q
2.26
2.01
EE
1
9.50
9.30
inches 0.465
0.455
0.007
0.004
1.242
1.218
D1
31.52
30.96
1.241
1.219 0.540 0.375
0.365
0.674
0.634
0.405
0.395
0.185
0.165
0.010 0.0201.400
0.069
0.059
1.625
1.615
1.005
0.995
0.130
0.120
0.089
0.079
0.374
0.366
H
3.48
2.97
0.137
0.117
L
Note
1. millimeter dimensions are derived from the original inch dimensions.
2. recommended screw pitch dimension of 1.52 inch (38.6 mm) based on M3 screw.
BLS8G2731L-400P_LS-400P#2 All information provided in this document is subject to legal disclaimers. © Ampleon The Netherlands B.V. 2015. All rights reserved.
Product data sheet Rev. 2 — 1 September 2015 9 of 13
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
Fig 7. Package outline SOT539B
References
Outline
version
European
projection Issue date
IEC JEDEC JEITA
SOT539B
sot539b_po
12-05-02
13-05-24
Unit(1)
mm
max
nom
min
4.7
4.2
11.81
11.56
31.55
30.94
31.52
30.96
9.5
9.3
9.53
9.27
1.75
1.50
17.12
16.10
3.48
2.97
10.29
10.03
0.25
A
Dimensions
bc
0.18
0.10
DD
1EE
1e
13.72
FHH
1
25.53
25.27
LQ
2.26
2.01
U1
32.39
32.13
U2w2
0.25
inches
max
nom
min
0.185
0.165
0.465
0.455
1.242
1.218
1.241
1.219
0.374
0.366
0.375
0.365
0.069
0.059
0.674
0.634
0.137
0.117
0.405
0.395
0.01
0.007
0.004
0.54
1.005
0.995
0.089
0.079
1.275
1.265
0.01
w3
0 5 10 mm
scale
c
E
Q
E1
e
H
L
b
H1
U1
U2
Dw2
w3
1 2
3 4
D
D
A
F
D1
5
Note
1. millimeter dimensions are derived from the original inch dimensions.
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Product data sheet Rev. 2 — 1 September 2015 10 of 13
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
9. Handling information
10. Abbreviations
11. Revision history
CAUTION
This device is sensitive to ElectroStatic Discharge (ESD). Observe precautions for handling
electrostatic sensitive devices.
Such precautions are described in the ANSI/ESD S20.20, IEC/ST 61340-5, JESD625-A or
equivalent standards.
Table 10. Abbreviations
Acronym Description
ESD ElectroStatic Discharge
LDMOS Laterally Diffused Metal-Oxide Semiconductor
MTF Median Time to Failure
S-band Short wave Band
VSWR Voltage Standing-Wave Ratio
Table 11. Revision history
Document ID Release date Data sheet status Change notice Supersedes
BLS8G2731L-400P_LS-400P#2 20150901 Product data sheet BLS8G2731L-400P_LS-400P v.1
Modifications: •The format of this document has been redesigned to comply with the new identity
guidelines of Ampleon.
•Legal texts have been adapted to the new company name where appropriate.
BLS8G2731L-400P_LS-400P v.1 20150526 Product data sheet - -
BLS8G2731L-400P_LS-400P#2 All information provided in this document is subject to legal disclaimers. © Ampleon The Netherlands B.V. 2015. All rights reserved.
Product data sheet Rev. 2 — 1 September 2015 11 of 13
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
12. Legal information
12.1 Data sheet status
[1] Please consult the most recently issued document before initiating or completing a design.
[2] The term ‘short data sheet’ is explained in section “Definitions”.
[3] The product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple devices. The latest product status
information is available on the Internet at URL http://www.ampleon.com.
12.2 Definitions
Draft — The document is a draft version only. The content is still under
internal review and subject to formal approval, which may result in
modifications or additions. Ampleon does not give any representations or
warranties as to the accuracy or completeness of information included herein
and shall have no liability for the consequences of use of such information.
Short data sheet — A short data sheet is an extract from a full data sheet
with the same product type number(s) and title. A short data sheet is intended
for quick reference only and should not be relied upon to contain detailed and
full information. For detailed and full information see the relevant full data
sheet, which is available on request via the local Ampleon sales office. In
case of any inconsistency or conflict with the short data sheet, the full data
sheet shall prevail.
Product specification — The information and data provided in a Product
data sheet shall define the specification of the product as agreed between
Ampleon and its customer, unless Ampleon and customer have explicitly
agreed otherwise in writing. In no event however, shall an agreement be valid
in which the Ampleon product is deemed to offer functions and qualities
beyond those described in the Product data sheet.
12.3 Disclaimers
Limited warranty and liability — Information in this document is believed to
be accurate and reliable. However, Ampleon does not give any
representations or warranties, expressed or implied, as to the accuracy or
completeness of such information and shall have no liability for the
consequences of use of such information. Ampleon takes no responsibility for
the content in this document if provided by an information source outside of
Ampleon.
In no event shall Ampleon be liable for any indirect, incidental, punitive,
special or consequential damages (including - without limitation - lost profits,
lost savings, business interruption, costs related to the removal or
replacement of any products or rework charges) whether or not such
damages are based on tort (including negligence), warranty, breach of
contract or any other legal theory.
Notwithstanding any damages that customer might incur for any reason
whatsoever, Ampleon’ aggregate and cumulative liability towards customer
for the products described herein shall be limited in accordance with the
Terms and conditions of commercial sale of Ampleon.
Right to make changes — Ampleon reserves the right to make changes to
information published in this document, including without limitation
specifications and product descriptions, at any time and without notice. This
document supersedes and replaces all information supplied prior to the
publication hereof.
Suitability for use — Ampleon products are not designed, authorized or
warranted to be suitable for use in life support, life-critical or safety-critical
systems or equipment, nor in applications where failure or malfunction of an
Ampleon product can reasonably be expected to result in personal injury,
death or severe property or environmental damage. Ampleon and its
suppliers accept no liability for inclusion and/or use of Ampleon products in
such equipment or applications and therefore such inclusion and/or use is at
the customer’s own risk.
Applications — Applications that are described herein for any of these
products are for illustrative purposes only. Ampleon makes no representation
or warranty that such applications will be suitable for the specified use without
further testing or modification.
Customers are responsible for the design and operation of their applications
and products using Ampleon products, and Ampleon accepts no liability for
any assistance with applications or customer product design. It is customer’s
sole responsibility to determine whether the Ampleon product is suitable and
fit for the customer’s applications and products planned, as well as for the
planned application and use of customer’s third party customer(s). Customers
should provide appropriate design and operating safeguards to minimize the
risks associated with their applications and products.
Ampleon does not accept any liability related to any default, damage, costs or
problem which is based on any weakness or default in the customer’s
applications or products, or the application or use by customer’s third party
customer(s). Customer is responsible for doing all necessary testing for the
customer’s applications and products using Ampleon products in order to
avoid a default of the applications and the products or of the application or
use by customer’s third party customer(s). Ampleon does not accept any
liability in this respect.
Limiting values — Stress above one or more limiting values (as defined in
the Absolute Maximum Ratings System of IEC 60134) will cause permanent
damage to the device. Limiting values are stress ratings only and (proper)
operation of the device at these or any other conditions above those given in
the Recommended operating conditions section (if present) or the
Characteristics sections of this document is not warranted. Constant or
repeated exposure to limiting values will permanently and irreversibly affect
the quality and reliability of the device.
Terms and conditions of commercial sale — Ampleon products are sold
subject to the general terms and conditions of commercial sale, as published
at http://www.ampleon.com/terms, unless otherwise agreed in a valid written
individual agreement. In case an individual agreement is concluded only the
terms and conditions of the respective agreement shall apply. Ampleon
hereby expressly objects to applying the customer’s general terms and
conditions with regard to the purchase of Ampleon products by customer.
No offer to sell or license — Nothing in this document may be interpreted or
construed as an offer to sell products that is open for acceptance or the grant,
conveyance or implication of any license under any copyrights, patents or
other industrial or intellectual property rights.
Export control — This document as well as the item(s) described herein
may be subject to export control regulations. Export might require a prior
authorization from competent authorities.
Document status[1][2] Product status[3] Definition
Objective [short] data sheet Development This document contains data from the objective specification for product development.
Preliminary [short] data sheet Qualification This document contains data from the preliminary specification.
Product [short] data sheet Production This document contains the product specification.
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Product data sheet Rev. 2 — 1 September 2015 12 of 13
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
Non-automotive qualified products — Unless this data sheet expressly
states that this specific Ampleon product is automotive qualified, the product
is not suitable for automotive use. It is neither qualified nor tested in
accordance with automotive testing or application requirements. Ampleon
accepts no liability for inclusion and/or use of non-automotive qualified
products in automotive equipment or applications.
In the event that customer uses the product for design-in and use in
automotive applications to automotive specifications and standards, customer
(a) shall use the product without Ampleon’ warranty of the product for such
automotive applications, use and specifications, and (b) whenever customer
uses the product for automotive applications beyond Ampleon’ specifications
such use shall be solely at customer’s own risk, and (c) customer fully
indemnifies Ampleon for any liability, damages or failed product claims
resulting from customer design and use of the product for automotive
applications beyond Ampleon’ standard warranty and Ampleon’ product
specifications.
Translations — A non-English (translated) version of a document is for
reference only. The English version shall prevail in case of any discrepancy
between the translated and English versions.
12.4 Trademarks
Notice: All referenced brands, product names, service names and trademarks
are the property of their respective owners.
Any reference or use of any ‘NXP’ trademark in this document or in or on the
surface of Ampleon products does not result in any claim, liability or
entitlement vis-à-vis the owner of this trademark. Ampleon is no longer part of
the NXP group of companies and any reference to or use of the ‘NXP’
trademarks will be replaced by reference to or use of Ampleon’s own Any
reference or use of any ‘NXP’ trademark in this document or in or on the
surface of Ampleon products does not result in any claim, liability or
entitlement vis-à-vis the owner of this trademark. Ampleon is no longer part of
the NXP group of companies and any reference to or use of the ‘NXP’
trademarks will be replaced by reference to or use of Ampleon’s own
trademarks.
13. Contact information
For more information, please visit:
http://www.ampleon.com
For sales office addresses, please visit:
http://www.ampleon.com/sales
BLS8G2731L(S)-400P
LDMOS S-band radar power transistor
© Ampleon The Netherlands B.V. 2015. All rights reserved.
For more information, please visit: http://www.ampleon.com
For sales office addresses, please visit: http://www.ampleon.com/sales
Date of release: 1 September 2015
Document identifier: BLS8G2731L-400P_LS-400P#2
Please be aware that important notices concerning this document and the product(s)
described herein, have been included in section ‘Legal information’.
14. Contents
1 Product profile . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 General description . . . . . . . . . . . . . . . . . . . . . 1
1.2 Features and benefits. . . . . . . . . . . . . . . . . . . . 1
1.3 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
2 Pinning information. . . . . . . . . . . . . . . . . . . . . . 2
3 Ordering information. . . . . . . . . . . . . . . . . . . . . 2
4 Limiting values. . . . . . . . . . . . . . . . . . . . . . . . . . 2
5 Thermal characteristics . . . . . . . . . . . . . . . . . . 3
6 Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . 3
7 Test information. . . . . . . . . . . . . . . . . . . . . . . . . 4
7.1 Ruggedness in class-AB operation . . . . . . . . . 4
7.2 Impedance information . . . . . . . . . . . . . . . . . . . 4
7.3 Test circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
7.4 Graphical data . . . . . . . . . . . . . . . . . . . . . . . . . 6
8 Package outline . . . . . . . . . . . . . . . . . . . . . . . . . 8
9 Handling information. . . . . . . . . . . . . . . . . . . . 10
10 Abbreviations. . . . . . . . . . . . . . . . . . . . . . . . . . 10
11 Revision history. . . . . . . . . . . . . . . . . . . . . . . . 10
12 Legal information. . . . . . . . . . . . . . . . . . . . . . . 11
12.1 Data sheet status . . . . . . . . . . . . . . . . . . . . . . 11
12.2 Definitions. . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
12.3 Disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
12.4 Trademarks. . . . . . . . . . . . . . . . . . . . . . . . . . . 12
13 Contact information. . . . . . . . . . . . . . . . . . . . . 12
14 Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13