NXP SemiconductorsProduct specificationN-channel dual gate MOS-FETsBF909; BF909RFEATURES transistor consists of an amplifier MOS-FET with source • and substrate interconnected and an internal bias circuit to Specially designed for use at 5 V supply voltage ensure good cross-modulation performance during AGC. • High forward transfer admittance • Short channel transistor with high forward transfer CAUTION admittance to input capacitance ratio The device is supplied in an antistatic package. The • Low noise gain controlled amplifier up to 1 GHz gate-source input must be protected against static • Superior cross-modulation performance during AGC. discharge during transport or handling. APPLICATIONSPINNING • VHF and UHF applications with 3 to 7 V supply voltage PINSYMBOLDESCRIPTION such as television tuners and professional communications equipment. 1 s, b source 2 d drain DESCRIPTION 3 g2 gate 2 4 g Enhancement type field-effect transistor in a plastic 1 gate 1 microminiature SOT143 or SOT143R package. The d handbook, halfpage d handbook, halfpage 3 4 4 3 g g 2 2 g g 1 1 1 2 2 1 s,b s,b Top view MAM124 Top view MAM125 - 1 BF909 marking code: %M3. BF909R marking code: %M4. Fig.1 Simplified outline (SOT143) and symbol. Fig.2 Simplified outline (SOT143R) and symbol. QUICK REFERENCE DATASYMBOLPARAMETERCONDITIONSMIN.TYP.MAX.UNIT VDS drain-source voltage − − 7 V ID drain current − − 40 mA Ptot total power dissipation − − 200 mW Tj operating junction temperature − − 150 °C yfs forward transfer admittance 36 43 50 mS Cig1-s input capacitance at gate 1 − 3.6 4.3 pF Crs reverse transfer capacitance f = 1 MHz − 35 50 fF F noise figure f = 800 MHz − 2 2.8 dB Rev. 02 - 19 November 2007 2 of 12 Document Outline FEATURES APPLICATIONS DESCRIPTION PINNING QUICK REFERENCE DATA LIMITING VALUES THERMAL CHARACTERISTICS STATIC CHARACTERISTICS DYNAMIC CHARACTERISTICS PACKAGE OUTLINES Legal information Data sheet status Definitions Disclaimers Trademarks Contact information Revision history