SERIES SURFACE MOUNT, GRF342 MAGNETIC-LATCHING BROADBAND RF RELAYS DPDT switch matrices, automated test equipment, spacecraft and DESCRIPTION other applications that require dependable high-frequency The Series GRF342 relay is a hermetically sealed, signal fidelity and performance. Its low profile makes the ultraminiature RF relay designed from inception for surface GRF342 ideal for applications where extreme packaging mount applications. This magnetic-latching relay features density and/or close PC board spacing are required. extremely low internal circuit losses for exceptional time and frequency domain response characteristics through and Unique features and manufacturing techniques include: beyond the UHF spectrum and into the S band. The GRF342 features a unique ground shield that isolates and shields Positive mounting means to RF ground plane. each lead to ensure excellent contact-to-contact and pole-to- Unique uniframe design provides high magnetic efficiency pole isolation. This ground shield provides an RF ground and mechanical rigidity. interface that results in improved high-frequency High force/mass ratios for resistance to shock and performance as well as parametric repeatability. The vibration. GRF342 extends performance advantages over similar RF Advanced cleaning techniques provide maximum devices that simply offer formed leads for surface mounting. assurance of internal cleanliness. Gold-plated precious metal alloy contacts ensure reliable The GRF342 is robust to shock, vibration and temperature dc and RF signal switching, as well as low and stable extremes for use in space applications and other demanding insertion loss. environments. It is engineered for use in RF attenuators, RF Robust to high temperature solder reflow environments. ENVIRONMENTAL AND PHYSICAL SPECIFICATIONS PRINCIPLE OF OPERATION PERMANENT MAGNET MAGNETIC CIRCUIT A Temperature Energizing Coil B produces a 55C to +85C MAGNETIC CIRCUIT B (Ambient) SOFT IRON FRAME magnetic field opposing the magnetic field of the Vibration 10 gs to 1000 Hz (Note 1) + permanent magnet in Circuit COIL A COIL B 30 gs for 6 msec (Note 1) B. As the net holding force Shock half-sine SOFT IRON SOFT IRON decreases, the attractive force COIL A COIL B - in the air gap of Circuit A, Enclosure Hermetically sealed AIR GAP SOFT IRON ARMATURE which also results from the STATIONARY CONTACT Weight 0.1 oz. (2.9g) max. magnetic field of the permanent magnet, becomes great enough to break the MOVING armature free of Core B, and CONTACT snap it into a closed position against Core A. The armature remains in this position upon removal of power from Coil B, but will snap back into position B upon energizing Coil A. Since operation depends upon cancellation of a magnetic field, it is necessary to apply the correct polarity to the relay coils as indicated on the relay schematic. When latching relays are installed in equipment, the latch and reset coils should not be pulsed simultaneously. Coils should not be pulsed with less than rated coil voltage and the pulse width should be a minimum of three times the specified operate time of the relay. If these conditions are not followed, it is possible for the relay to be in the magnetic neutral position. GRF342 Page 1 SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE 2003 TELEDYNE RELAYS www.teledynerelays.com GRF342/0703/Q1 - +SERIES GRF342 TYPICAL RF CHARACTERISTICS (See RF Notes) Isolation Across Contacts (RF Note 4) Isolation Pole to Pole (RF Note 5) -25 -25 -30 -30 -35 -35 -40 -45 -40 -50 -45 -55 -50 -60 -65 -55 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Frequency (MHz) Frequency (MHz) Insertion Loss (RF Note 6) VSWR (RF Note 6) -0.1 2.2 2.0 -0.3 1.8 -0.5 1.6 -0.7 1.4 -0.9 1.2 -1.1 1.0 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Frequency (MHz) Frequency (MHz) GRF342 Time Response (RF Note 6) 1.1 0.9 90% 0.7 37ps reference 0.5 61ps propagation delay time 0.3 52.5ps pulse rise time 10% 0.1 -0.1 -100 0 100 200 300 400 500 600 700 800 900 Time (ps) RF NOTES 1. Test conditions: a. Fixture: .031 copper clad, reinforced PTFE, RT/duroid 6002 with SMA connectors. (RT/duroid is a registered trademark of Rogers Corporation.) b. RF ground shield is soldered to PCB RF ground plane. c. Room ambient temperature. d. Terminals not tested were terminated with 50-ohm load. e. Contact signal level: 10 dBm. f. No. of test samples: 2. 2. Data presented herein represents typical characteristics and is not intended for use as specification limits. 3. Data is per pole, except for pole-to-pole data. 4. Data is the average from readings taken on all open contacts. 5. Data is the average from readings taken on poles with coil energized and de-energized. 6. Data is the average from readings taken on all closed contacts. 7. Test fixture effect de-embedded from frequency and time response data. 2003 TELEDYNE RELAYS SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE GRF342 Page 2 www.teledynerelays.com GRF342/0703/Q1 Insertion Loss (dB) Isolation (dB) Volt Isolation (dB) VSWR