NPN RF Transistor

BF494 NPN RF Transistor July 2006 BF494 NPN RF Transistor tm TO-92 1. Collector 2. Emitter 3. Base Ta = 25°C unless otherwise noted Absolute Maximum Ratings * Symbol VCEO VCBO VEBO IC TJ TSTG Collector-Emitter Voltage Collector-Base Voltage Emitter-Base Voltage Collector Current - Continuous Junction Temperature Storage Temperature Range Parameter Value 20 30 5.0 30 150 - 55 ~ 150 Unit V V V mA °C °C * These ratings are limiting values above which the serviceability of any semiconductor device may be impaired. NOTES: 1) These ratings are based on a maximum junction temperature of 150 degrees C. 2) These are steady state limits. The factory should be consulted on applications involving pulsed or low duty cycle operations www.DataSheet4U.com Thermal Characteristics Symbol PD RθJC RθJA Parameter Total Device Dissipation, by RθJA Derate above 25°C Thermal Resistance, Junction to case Thermal Resistance, Junction to Ambient TC = 25°C unless otherwise noted Value 350 2.8 125 357 Unit mW mW/°C °C/W °C/W Electrical Characteristics* Symbol V(BR)CEO V(BR)CBO V(BR)EBO ICES hFE VCE(sat) VBE(sat) VBE(ON) Parameter Collector-Emitter Breakdown Voltage Collector-Base BreakdownVoltage Emitter-Base Breakdown Voltage Collector-Emitter Sustaining Current DC Current Gain Collector-Emitter Saturation Voltage Base-Emitter Saturation Voltage Base-Emitter On Voltage Conditions IC = 1.0mA, IB = 0 IC = 10µA, IE = 0 IE = 10µA, IC = 0 VCE = 40V, VEB = 0V VCE = 10V, IC = 1mA IC = 10mA, IB = 5mA IC = 10mA, IB = 5mA VCE = 10V, IC = 10mA Min. 20 30 5.0 Max. Units V V V 10 67 222 0.2 0.92 650 740 nA V V mV * DC Item are tested by Pulse Test: Pulse Width≤300us, Duty Cycle≤2% ©2006 Fairchild Semiconductor Corporation 1 www.fairchildsemi.com BF494 Rev. A BF494 NPN RF Transistor Package Dimensions TO-92 4.58 –0.15 +0.25 0.46 14.47 ±0.40 ±0.10 4.58 ±0.20 1.27TYP [1.27 ±0.20] 3.60 ±0.20 1.27TYP [1.27 ±0.20] 0.38 –0.05 +0.10 3.86MAX 1.02 ±0.10 0.38 –0.05 +0.10 (R2.29) (0.25) Dimensions in Millimeters 2 BF494 Rev. A www.fairchildsemi.com BF494 NPN RF Transistor BF494 NPN RF Transistor TRADEMARKS The following are registered and unregistered trademarks Fairchild Semiconductor owns or is authorized to use and is not intended to be an exhaustive list of all such trademarks. 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FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN;NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS. THESE SPECIFICATIONS DO NOT EXPAND THE TERMS OF FAIRCHILD’S WORLDWIDE TERMS AND CONDITIONS, SPECIFICALLY THE WARRANTY THEREIN, WHICH COVERS THESE PRODUCTS. LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF FAIRCHILD SEMICONDUCTOR CORPORATION. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, or (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in significant injury to the user. 2. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. PRODUCT STATUS DEFINITIONS Definition of Terms Datasheet Identification Advance Information Product Status Formative or In Design Definition This datasheet contains the design specifications for product development. Specifications may change in any manner without notice. This datasheet contains preliminary data, and supplementary data will be published at a later date. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. This datasheet contains final specifications. Fairchild Semiconductor reserves the right to make changes at any time without notice in order to improve design. Preliminary First Production No Identification Needed Full Production Obsolete Not In Production This datasheet contains specifications on a product that has been discontinued by Fairchild semiconductor. The datasheet is printed for reference information only. Rev. I20 3 BF494 Rev. A www.fairchildsemi.com