BF1108,215 NXP

BF1108 BF1108R Silicon RF switches Rev. 04 29 May 2008 Product data sheet 1. Product prole 1.1 General description These switches are a combination of a depletion type Field-Effect Transistor (FET) and a band-switching diode in an SOT143B (BF1108) or SOT143R (BF1108R) package. The low loss and high isolation capabilities of these devices provide excellent RF switching functions. The gate of the MOSFET can be isolated from ground with the diode, resulting in low losses. Integrated diodes between gate and source and between gate and drain protect against excessive input voltage surges. CAUTION This device is sensitive to ElectroStatic Discharge (ESD). Therefore care should be taken during transport and handling. 1.2 Features n Specially designed for low loss RF switching up to 1 GHz 1.3 Applications n Various RF switching applications such as: u Passive loop through for VCR tuner u Transceiver switching 1.4 Quick reference data Table 1. Quick reference data Symbol Parameter Conditions Min Typ Max Unit 1 L on-state insertion loss R =R =50 f 1 GHz -- 2 dB ins(on) S L V =V =0V I =0mA SK DK F ISL off-state isolation R =R =50 f 1 GHz 30 --dB off S L V =V =5V I =1mA SK DK F R drain-source on-state V =0V I = 1 mA - 12 20 DSon KS D resistance V gate-source pinch-off V =1V I =20 A- - 3 -4V GS(p) DS D voltage 1 I = diode forward current. FBF1108 BF1108R NXP Semiconductors Silicon RF switches 2. Pinning information Table 2. Pinning Pin Description Simplied outline Graphic symbol BF1108 (SOT143B) 1 FET gate diode anode 4 3 43 2 diode cathode 1 3 source 1 4 drain 12 1 2 001aai042 BF1108R (SOT143R) 1 FET gate diode anode 3 4 34 2 diode cathode 1 3 source 1 4 drain 21 21 001aai043 1 Drain and source are interchangeable. 3. Ordering information Table 3. Ordering information Type number Package Name Description Version BF1108 - plastic surface-mounted package 4 leads SOT143B BF1108R - plastic surface-mounted package reverse pinning SOT143R 4 leads 4. Marking Table 4. Marking Type number Marking code BF1108 NGp BF1108R NHp BF1108 BF1108R 4 NXP B.V. 2008. All rights reserved. Product data sheet Rev. 04 29 May 2008 2 of 10