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| SPDT Reflective Switch ITT239AB FEATURES * * * * * * * SOIC-8 package High Isolation (34 dB @ 1 GHz) Usable to 4 GHz Low DC Power Consumption Positive Control when "floated" with capacitors Pin-for-pin compatible with standard "239" reflective switches (R) Self-Aligned MSAG MESFET Process DESCRIPTION The ITT239AB is a general purpose SPDT reflective switch in a plastic SOIC-8 package for commercial applications. The switch operates with -5, 0 volts, but operates with +5 volts when device is "floated." V1 0 -5 TRUTH TABLE V2 -5 0 J1-J2 Isolation Insertion Loss J1-J3 Insertion Loss Isolation ELECTRICAL SPECIFICATIONS AT 25C (0, -5 V) Parameter Insertion Loss Test Conditions 2 DC -0.1 GHz DC-0.5 GHz DC-1.0 GHz DC-2.0 GHz DC-2.5 GHz DC-0.1 GHz DC-0.5 GHz DC-1.0 GHz DC-2.0 GHz DC-2.5 GHz DC-1.0 GHz DC-2.5 GHz 1 Min Isolation 52 39 30 21 17 Typ 0.3 0.4 0.5 0.7 0.8 59 43 34 24 21 Max 0.5 0.6 0.7 0.85 0.95 Unit dB dB dB dB dB dB dB dB dB dB VSWR 1. 2. 3. 4. 3 1.20:1 1.55:1 All measurements made in a 50 system, unless otherwise specified. DC = 50 MHz. Insertion loss state. Video feedthru measured with 1 ns rise Specifications Subject to Change Without Notice 902217 D, December 1999 GaAsTEK 5310 Valley Park Drive Roanoke, VA 24019 USA www.gaastek.com Tel: 1-540-563-3949 1-888-563-3949 (USA) Fax: 1-540-563-8616 1 SPDT Reflective Switch ITT239AB OPERATING CHARACTERISTICS AT 25C (0, -5 V) Parameter Switching Characteristics Condition Rise, Fall (10/90% or 90/10%) On, Off (50% CTL to 90/10% RF) 4 Video Feedthru Frequency Min Typ 3 6 20 19 26 46 Max Units ns ns mV dBm dBm dBm A A A Input Power for 1 dB Compression Intermodulation Intercept Point (IP3) Control Voltages For two-tone Input Power +5 dBm VLow = 0.0 to -0.2 V VHigh = -5 V VHigh = -8 V 0.05 GHz 0.5 - 2.0 GHz 0.5 - 2.0 GHz 20 20 200 MAXIMUM RATINGS Rating 3 RF input power Control Voltage Junction Temperature Storage Temperature Symbol J1,2,3 V1,2 TJ TSTG Value 0.5 W @ 50 MHz 0/-8 V 2 W > 500 MHz 0/-8 V +0.2, -8 V +150 C -40 C to +150 C 3.0 2.5 2.0 dB 1.5 1.0 0.5 0.0 0 1000 2000 3000 4000 Frequency (MHz) Insertion Loss vs Frequency 70 60 50 dB 40 30 20 10 0 0 1000 2000 Frequency (MHz) 3000 4000 1.0 0 1000 2000 Frequency (MHz) 3000 4000 1.5 2.5 2.0 3.0 Isolation vs Frequency VSWR vs Frequency Specifications Subject to Change Without Notice 902217 D, December 1999 GaAsTEK 5310 Valley Park Drive Roanoke, VA 24019 USA www.gaastek.com Tel: 1-540-563-3949 1-888-563-3949 (USA) Fax: 1-540-563-8616 2 |
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