DISCRETE SEMICONDUCTORS DATA SHEET BF908WR N-channel dual-gate MOS-FET Preliminary specification 1995 Apr 25

NXP Semiconductors Preliminary specification N-channel dual-gate MOS-FET BF908WR FEATURES PINNING  High forward transfer admittance PIN SYMBOL DESCRIPTION  Short channel transistor with high forward transfer 1 s, b source admittance to input capacitance ratio 2 d drain  Low noise gain controlled amplifier up to 1GHz. 3 g gate2 2 4 g gate1 1 APPLICATIONS  VHF and UHF applications with 12V supply voltage, such as television tuners and professional d communications equipment. 3 4 g 2 DESCRIPTION g 1 Depletion type field effect transistor in a plastic microminiature SOT343R package. The transistor is protected against excessive input voltage surges by integrated back-to-back diodes between gates and 2 1 s,b source. Top view MAM198 CAUTION Marking code: MD. The device is supplied in an antistatic package. The gate-source input must be protected against static Fig.1 Simplified outline (SOT343R) and symbol. discharge during transport or handling. QUICK REFERENCE DATA SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT V drain-source voltage   12 V DS I drain current   40 mA D P total power dissipation   300 mW tot T operating junction temperature   150 C j y  forward transfer admittance 36 43 50 mS fs C input capacitance at gate1 2.4 3.1 4 pF ig1-s C reverse transfer capacitance f=1MHz 20 30 45 fF rs F noise figure f=800MHz  1.5 2.5 dB 1995 Apr 25 2

NXP Semiconductors Preliminary specification N-channel dual-gate MOS-FET BF908WR LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 134). SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT V drain-source voltage  12 V DS I drain current  40 mA D I gate1 current  10 mA G1 I gate2 current  10 mA G2 P total power dissipation up to T =45C; see Fig.2;  300 mW tot amb note1 T storage temperature 65 +150 C stg T operating junction temperature  +150 C j Note 1. Device mounted on a printed-circuit board. MLD154 400 handbook, halfpage Ptot (mW) 300 200 100 0 0 50 100 150 200 Ta m b ( o C) Fig.2 Power derating curve. 1995 Apr 25 3

NXP Semiconductors Preliminary specification N-channel dual-gate MOS-FET BF908WR THERMAL CHARACTERISTICS SYMBOL PARAMETER CONDITIONS VALUE UNIT R thermal resistance from junction to ambient note1 350 K/W th j-a R thermal resistance from junction to soldering point T =87C; note2 210 K/W th j-s s Notes 1. Device mounted on a printed-circuit board. 2. T is the temperature at the soldering point of the source lead. s STATIC CHARACTERISTICS T =25C; unless otherwise specified. j SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT V gate1-source breakdown voltage V =V =0; I =10mA 8  20 V (BR)G1-SS G2-S DS G1-S V gate2-source breakdown voltage V =V =0; I =10mA 8  20 V (BR)G2-SS G1-S DS G2-S V gate1-source cut-off voltage V =4V; V =8V; I =20A   2 V (P)G1-S G2-S DS D V gate2-source cut-off voltage V =4V; V =8V; I =20A   1.5 V (P)G2-S G1-S DS D I drain-source current V =4V; V =8V; V =0 3 15 27 mA DSS G2-S DS G1-S I gate1 cut-off current V =V =0; V =5V   50 nA G1-SS G2-S DS G1-S I gate2 cut-off current V =V =0; V =5V   50 nA G2-SS G1-S DS G2-S DYNAMIC CHARACTERISTICS Common source; T =25C; V =8V; V =4V; I =15mA; unless otherwise specified. amb DS G2-S D SYMBOL PARAMETER CONDITIONS MIN. TYP. MAX. UNIT y  forward transfer admittance pulsed; T =25C 36 43 50 mS fs j C input capacitance at gate1 f=1MHz 2.4 3.1 4 pF ig1-s C input capacitance at gate2 f=1MHz 1.2 1.8 2.5 pF ig2-s C drain-source capacitance f=1MHz 1.2 1.7 2.2 pF os C reverse transfer capacitance f=1MHz 20 30 45 fF rs F noise figure f=200MHz; G =2mS; B =B  0.6 1.2 dB S S Sopt f=800MHz; G =G ; B =B  1.5 2.5 dB S Sopt S Sopt 1995 Apr 25 4

NXP Semiconductors Preliminary specification N-channel dual-gate MOS-FET BF908WR MRC281 MRC282 40 30 handbook, halfpage VG2-S = 4 V handbook, halfpage VG1-S = 0.3 V ID (mA) 3 V ID (mA) 30 0.2 V 2 V 20 1.5 V 0.1 V 1 V 20 0 V 0.5 V 10 −0.1 V 10 −0.2 V −0.3 V 0 V 0 0 −0.6 −0.4 −0.2 0 0.2 0.4 0.6 0 4 8 12 16 VG1-S (V) VDS (V) VDS=8V. VG2-S=4V. Tj=25C. Tj=25C. Fig.3 Transfer characteristics; typical values. Fig.4 Output characteristics; typical values. MRC280 MRC276 50 60 4 V Yfs 3 V Yfs (mS) 2 V 40 (mS) 1.5 V 40 30 1 V 20 20 0.5 V 10 VG2-S= 0 V 0 0 0 5 10 15 20 25 40 0 40 80 120 160 ID (mA) Tj (o C) VDS=8V. Tj=25C. Fig.5 Forward transfer admittance as a function Fig.6 Forward transfer admittance as a function of drain current; typical values. of junction temperature; typical values. 1995 Apr 25 5

NXP Semiconductors Preliminary specification N-channel dual-gate MOS-FET BF908WR PACKAGE OUTLINE Plastic surface-mounted package; reverse pinning; 4 leads SOT343R D B E A X y HE v M A e 3 4 Q A A1 c 2 1 w M B bp b1 Lp e1 detail X 0 1 2 mm scale DIMENSIONS (mm are the original dimensions) UNIT A mAa1x bp b1 c D E e e1 HE Lp Q v w y 1.1 0.4 0.7 0.25 2.2 1.35 2.2 0.45 0.23 mm 0.1 1.3 1.15 0.2 0.2 0.1 0.8 0.3 0.5 0.10 1.8 1.15 2.0 0.15 0.13 OUTLINE REFERENCES EUROPEAN ISSUE DATE VERSION IEC JEDEC EIAJ PROJECTION 97-05-21 SOT343R 06-03-16 1995 Apr 25 6

NXP Semiconductors Preliminary specification N-channel dual-gate MOS-FET BF908WR DATA SHEET STATUS DOCUMENT PRODUCT DEFINITION STATUS(1) STATUS(2) Objective data sheet Development This document contains data from the objective specification for product development. Preliminary data sheet Qualification This document contains data from the preliminary specification. Product data sheet Production This document contains the product specification. Notes 1. Please consult the most recently issued document before initiating or completing a design. 2. 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 URLhttp://www.nxp.com. DEFINITIONS Right to make changes  NXP Semiconductors reserves the right to make changes to information Product specification  The information and data published in this document, including without limitation provided in a Product data sheet shall define the specifications and product descriptions, at any time and specification of the product as agreed between NXP without notice. This document supersedes and replaces all Semiconductors and its customer, unless NXP information supplied prior to the publication hereof. Semiconductors and customer have explicitly agreed otherwise in writing. In no event however, shall an Suitability for use  NXP Semiconductors products are agreement be valid in which the NXP Semiconductors not designed, authorized or warranted to be suitable for product is deemed to offer functions and qualities beyond use in life support, life-critical or safety-critical systems or those described in the Product data sheet. equipment, nor in applications where failure or malfunction of an NXP Semiconductors product can reasonably be expected to result in personal injury, death or severe DISCLAIMERS property or environmental damage. NXP Semiconductors Limited warranty and liability  Information in this accepts no liability for inclusion and/or use of NXP document is believed to be accurate and reliable. Semiconductors products in such equipment or However, NXP Semiconductors does not give any applications and therefore such inclusion and/or use is at representations or warranties, expressed or implied, as to the customer’s own risk. the accuracy or completeness of such information and Applications  Applications that are described herein for shall have no liability for the consequences of use of such any of these products are for illustrative purposes only. information. NXP Semiconductors makes no representation or In no event shall NXP Semiconductors be liable for any warranty that such applications will be suitable for the indirect, incidental, punitive, special or consequential specified use without further testing or modification. damages (including - without limitation - lost profits, lost Customers are responsible for the design and operation of savings, business interruption, costs related to the their applications and products using NXP removal or replacement of any products or rework Semiconductors products, and NXP Semiconductors charges) whether or not such damages are based on tort accepts no liability for any assistance with applications or (including negligence), warranty, breach of contract or any customer product design. It is customer’s sole other legal theory. responsibility to determine whether the NXP Notwithstanding any damages that customer might incur Semiconductors product is suitable and fit for the for any reason whatsoever, NXP Semiconductors’ customer’s applications and products planned, as well as aggregate and cumulative liability towards customer for for the planned application and use of customer’s third the products described herein shall be limited in party customer(s). Customers should provide appropriate accordance with the Terms and conditions of commercial design and operating safeguards to minimize the risks sale of NXP Semiconductors. associated with their applications and products. 1995 Apr 25 7

NXP Semiconductors Preliminary specification N-channel dual-gate MOS-FET BF908WR NXP Semiconductors does not accept any liability related Export control  This document as well as the item(s) to any default, damage, costs or problem which is based described herein may be subject to export control on any weakness or default in the customer’s applications regulations. Export might require a prior authorization from or products, or the application or use by customer’s third national authorities. party customer(s). Customer is responsible for doing all Quick reference data  The Quick reference data is an necessary testing for the customer’s applications and extract of the product data given in the Limiting values and products using NXP Semiconductors products in order to Characteristics sections of this document, and as such is avoid a default of the applications and the products or of not complete, exhaustive or legally binding. the application or use by customer’s third party customer(s). NXP does not accept any liability in this Non-automotive qualified products  Unless this data respect. sheet expressly states that this specific NXP Semiconductors product is automotive qualified, the Limiting values  Stress above one or more limiting product is not suitable for automotive use. It is neither values (as defined in the Absolute Maximum Ratings qualified nor tested in accordance with automotive testing System of IEC60134) will cause permanent damage to or application requirements. NXP Semiconductors accepts the device. Limiting values are stress ratings only and no liability for inclusion and/or use of non-automotive (proper) operation of the device at these or any other qualified products in automotive equipment or conditions above those given in the Recommended applications. operating conditions section (if present) or the Characteristics sections of this document is not warranted. In the event that customer uses the product for design-in Constant or repeated exposure to limiting values will and use in automotive applications to automotive permanently and irreversibly affect the quality and specifications and standards, customer (a) shall use the reliability of the device. product without NXP Semiconductors’ warranty of the product for such automotive applications, use and Terms and conditions of commercial sale  NXP specifications, and (b) whenever customer uses the Semiconductors products are sold subject to the general product for automotive applications beyond NXP terms and conditions of commercial sale, as published at Semiconductors’ specifications such use shall be solely at http://www.nxp.com/profile/terms, unless otherwise customer’s own risk, and (c) customer fully indemnifies agreed in a valid written individual agreement. In case an NXP Semiconductors for any liability, damages or failed individual agreement is concluded only the terms and product claims resulting from customer design and use of conditions of the respective agreement shall apply. NXP the product for automotive applications beyond NXP Semiconductors hereby expressly objects to applying the Semiconductors’ standard warranty and NXP customer’s general terms and conditions with regard to the Semiconductors’ product specifications. purchase of NXP Semiconductors 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. 1995 Apr 25 8

NXP Semiconductors provides High Performance Mixed Signal and Standard Product solutions that leverage its leading RF, Analog, Power Management, Interface, Security and Digital Processing expertise Customer notification This data sheet was changed to reflect the new company name NXP Semiconductors, including new legal definitions and disclaimers. No changes were made to the technical content, except for package outline drawings which were updated to the latest version. Contact information For additional information please visit: http://www.nxp.com For sales offices addresses send e-mail to: salesaddresses@nxp.com © NXP B.V. 2010 All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any consequence of its use. Publication thereof does not convey nor imply any license under patent- or other industrial or intellectual property rights. Printed in The Netherlands R77/01/pp9 Date of release: 1995 Apr 25