- Buyers Guide
Memory BIST IC Option
LogicVision's built-in self-test (BIST) technology is now offered as an option in embedded memory devices and helps to ensure automated testability. In addition, the technology is quickly becoming a prerequisite in IC design to optimize design time and silicon real estate, and to preserve IC core integrity. By incorporating BIST into memory devices, customers can achieve 100 percent fault coverage while simplifying their test methodologies with minimal impact on silicon area. BIST technology uses a distributed, hierarchical testing approach that embeds testers within a system being tested during the front end of the design cycle, reducing test development time and costs. Delivery: stock.
American Microsystems Inc. (AMI), Pocatello, ID (208) 233-4690.
These connectors are of standard configuration and can cross reference to many of the more common connectors manufactured by other connector suppliers. Typical configurations include blind mate, SMA, SMB, SMC, MCX and other miniatures, as well as BNC, TNC, N, C, SC and HN series. Custom connectors also are available.
Aviel Electronics, Las Vegas, NV (702) 739-8155.
2.1 - 2.4 GHz Drop-in Isolator
The model S525-D14 drop-in isolator is designed for low cost, connectorless, stripline subsystems. The solid tabs are an integral part of the isolator assembly and can be soldered repeatedly without affecting isolator performance. The unit is optimized for a low insertion loss of < 0.5 dB in the frequency range from 2.1 to 2.4 GHz with isolation of 22 dB (typ) and good SWR of 1.25 on all ports. The isolator is available in a number of different frequency bands and power-handling capabilities. Size: 0.75" x 0.75" x 0.25".
Device Technology, Santa Clara, CA (408) 748-7751.
The Mini-Cell series diplexer is designed for use in A-band applications and is part of a complete line of custom ceramic filter designs developed for wireless communications and navigational equipment. The diplexer has pass bands of 824 to 835 MHz and 869 to 880 MHz. It achieves > 55 dB isolation, yet offers an insertion loss of < 1.5 dB. These specifications are maintained across a temperature range of -40° to +85°C, making the unit suitable for use in a broad range of harsh environmental conditions. B-band and other high performance devices are also available.
ComNav Engineering Inc., Portland, ME (207) 797-4588.
DC - 2 GHz High Power Switch
The model DS2-313E001 high power switch operates from DC to 2 GHz and is targeted for space applications, specifically the Global Positioning System (GPS) marketplace. Isolation is 60 dB, insertion loss is 0.15 dB (max) and RF power is 80 W CW at 1.575 GHz.
DMT Division of Jay-El Products Inc., Carson, CA (310) 513-7200.
140 - 220 GHz Balanced Mixer
The model BMC-05 balanced mixer operates over the frequency range from 140 to 220 GHz for applications in radio receivers, radar systems, radiometers, and up- and downconverter systems. The unit uses high quality, low capacitance beam lead Schottky diodes to achieve a typical conversion loss of better than 9 dB, and has a fixed tuned bandwidth of ±10 GHz (typ) on both the RF and LO ports. The required LO drive level is +10 dBm. Size: 20 x 20 x 28 mm3 (including the IF K connector).
Farran Technology Ltd., Ballincollig, Cork, Ireland +353-21-872814.
Balanced RF SAW Bandpass Filters
The F5CL-B2 series surface acoustic wave (SAW) bandpass filters incorporate the company's new double-mode SAW design technology and are designed for 900 MHz Global System for Mobile communications (GSM) applications. Available standard versions of the filters match worldwide communication standard GSM at impedances of 50/50 W, 50/100 W and 50/150 W for receive and transmit functions. The filters are housed in an SMT leadless chip carrier package measuring 3.8 x 3.8 x 1.6 mm, and are resistant to climate variations, mechanical vibration and shock.
Fujitsu Microelectronics Ltd. c/o JDK Public Relations, Westerham, Kent, UK 01959 562772.
Noiseless DC Heater
The HD series DC heaters are designed for military applications and are fully screened to MIL-STD-883 with all-metal packaging, which eliminates the cracking, lead damage and thermal problems associated with berrylia-based heaters. The compact units contain sensing, control and power circuitry. The 50° to 130°C temperature setting requires a single external resistor. The heater's switching is damped sufficiently to prevent inducing noise spurs in the sensitive circuitry of the SAW and yttrium iron garnet oscillators. Size: 0.750" x 0.500" x 0.185".
General Microcircuits Corp., a subsidiary of General Microwave Corp., Billerica, MA (508) 663-9101.
Tantalum Nitride Thin-film Resistor Networks
The HCTN series thin-film resistor networks combine sputtered tantalum nitride resistors with a high temperature barrier layer and gold conductors for high reliability in extreme environments. The laser-trimmed networks are self-passivating for good moisture protection and reliability, and can withstand temperatures up to 450°C for one hour. Service temperature is 300°C. Resistivity is as low as 25 W/sq with a temperature coefficient of < 100 ppm/°C and 0.02 percent (ratio) stability per 1000 hours at 125°C. The units are offered as unpackaged devices with sputtered and electroplated wire-bondable gold conductors. An optional sputtered nickel layer may be added for solder connections and surface-mount applications. Networks also are available in low cost commercial and medical dual and single in-line package configurations, as well as military con-figurations that are in full compliance with MIL-STD-883.
HyComp Inc., Marlborough, MA (508) 485-6300.
This International Maritime Satellite (INMARSAT) diplexer passes the 1542 and 1644 MHz frequency bands. Insertion loss is < 2.5 dB, and rejection of the adjacent band is > 50 dBa from 1626 to 1660 MHz and 45 dBa from 1525 to 1559 MHz. SMT (leaded or leadless) or thru-hole (PCB) configurations are available, and the units are reflowable.
Integrated Microwave Corp., San Diego, CA (619) 259-2600.
Nine-channel Switched Filter Bank
The model 9SFB-9300/15700-0/0 switched filter bank operates over the 9.3 to 15.7 GHz frequency range and has nine combline filters with 1 GHz-wide pass bands and rejection of 60 dB ±1.1 GHz from band center. The 60 dB rejection holds out to 18 GHz on the high side and down to 2 GHz on the low side. The filters have < 3 ns group delay variation over the pass band. The unit uses a totem pole switch driver controlled by four TTL control bits and switches in under 150 ns. Video transients are minimized to under -70 dBm.
K&L Microwave Inc., Salisbury, MD (410) 749-2424.
0.5 - 20 GHz Directional Coupler
The model 1520 directional coupler operates over the frequency range from 0.5 to 20 GHz. Nominal coupling (with respect to output) is 16 ±1 dB and frequency sensitivity is flat within ±1 dB. Directivity is > 12 dB, SWR is < 1.4 and insertion loss is 1.3 dB (max). Connectors are SMA female or male. Price: $700. Delivery: four to six weeks (ARO).
Krytar, Sunnyvale, CA (408) 734-5999.
Monolithic PIN Diode Switches
Three new monolithic PIN diode switches are the first to make use of the company's patented heterolithic microwave IC fabrication process, which incorporates silicon pedestals that form vias and either series or shunt diodes in a low loss glass substrate. The switches demonstrate low insertion loss and high isolation through low mm-wave frequencies, and offer good performance up to 26.5 GHz for broadband, military and commercial applications.
M/A-COM Inc., an AMP company, Lowell, MA (800) 366-2266.
21.2 - 23.6 GHz Microwave Radio Duplexer
The model T-121S10 four-port circulator operates from 21.2 to 23.6 GHz and provides a means for connection of a transmitter and receiver to a common antenna. Insertion loss is < 0.7 dB (ports 1 to 2) and < 0.5 dB (ports 2 to 3); SWR is < 1.3 (all ports); and isolation is > 25 dB (ports 2 to 3) and > 20 dB (ports 2 to 1) with a shorted or open condition (any phase) on port 3. Specifications are guaranteed over the operating temperature range from -40° to +70°C. Delivery: stock to eight weeks.
MICA Microwave, San Jose, CA (408) 363-9200.
The UT-DB series In-A-Cable DC blocks allow RF transmission through the line while blocking the passage of DC voltage. When functions are implemented as an In-A-Cable product, cost can be lowered because of reduced parts and manufacturing time, and reliability and performance can be increased by eliminating discontinuities. The DC blocks pass RF and microwave signals over various bands from 10 MHz to 20 GHz and are available as inner or outer blocks with breakdown voltages of 25, 50 and 100 V DC. Standard semirigid cable diameters are 0.047", 0.085", 0.141" and 0.250". Flexible cables also can be specified.
MICRO-COAX, a division of UTI Corp., Collegeville, PA (610) 489-3700.
Six-way, 0° Splitter/Combiner
The model ZB6PD-1700 six-way, 0° power splitter/combiner operates over the frequency range from 1500 to 1700 MHz. Insertion loss is 0.5 dB, isolation is 30 dB and amplitude unbalance is 0.6 dB (max). Typical SWR is 1.15 in and 1.30 out. The unit is designed for 50 W systems and can be specified with N-F or SMA-F connectors. Maximum power input is 10 W when used within the -55° to +100°C (max) temperature range. Price: $149.95 each (1-9). Delivery: Guaranteed to ship within one week.
Mini-Circuits, Brooklyn, NY (718) 934-4500.
The model 4194 tuning tool makes it easier to tune the company's Thin-Trim" miniaturized trimmer capacitors, which provide a broad range of capacitance values (0.5 to 2.5 pF and 5 to 25 pF). The tool allows greater accuracy and faster adjustment time. Price: $1.90 each. Delivery: stock.
Johanson, Boonton, NJ (201) 334-2676.
Thick-film Chip Attenuators
These thick-film T and Pi chip attenuators are available in 1 to 20 dB and 1 to 40 dB increments, respectively. The units feature accuracy within ±0.5 dB, an operating temperature of -55° to +150°C and DC resistance to 10 GHz, depending on style. SWR is 1.5 (max) and power is rated to 1 W. Terminations are available in gold for wire-bondable versions and in platinum, gold or palladium silver with or without solder for epoxy or solder mounting.
Mini-Systems Inc., North Attleboro, MA (508) 695-0203.
These quadrature couplers are available as both single- and multisection units. For the single-section couplers in near octave bandwidths from 68 to 1200 MHz, SWR is 1.2 and amplitude balance is ±0.4 dB. The model QS20730 single-section quadrature coupler operates over the frequency range from 500 to 960 MHz and offers maximum power of 200 W, loss of 0.4 dB and phase balance of ±5°. For the multisection couplers in multi-octave ranges from 30 to 980 MHz, SWR is 1.25 and amplitude balance is ±0.6 dB. The model QM20600 multisection quadrature coupler operates over the frequency range from 225 to 980 MHz and offers maximum power of 200 W, loss of 0.5 dB and phase balance of ±5°.
National Communications Electronics (NCE), Largo, FL (813) 545-3867.
70 MHz IF LC Filters
These 70 MHz IF LC filters are designed with bandwidth ranges from 2.5 to 60 MHz and are available with various insertion loss and shape factors. Several package sizes and configurations are available, including thru-hole (including 14- and 16-pin dual in-line package), gull-wing surface mount, leadless surface mount and connectorized. The surface-mount package configurations are available in designs that meet high temperature reflow requirements. Prototype pricing is available with guaranteed six-week delivery for most models.
PTI, Piezo Technology Inc., Orlando, FL (407) 298-2000.
Miniature Coaxial Connectors
The MCX 75 W series miniature coaxial connectors are derived from the company's MCX 50 W series and are 100 percent compatible with the 50 W models. The connectors are approximately 50 percent smaller than the SMZ (SMB 75 W) units and feature good performance from DC to 6 GHz for monitoring, video and broadcast applications. The straight cable connectors are full crimp. The panel jacks benefit from a fast and easy snap mount and also can be used as free cable connectors. All cable connectors are manufactured in brass with a nonmagnetic bronze alloy finish, and are available for single- and double-braid cables. PCB receptacles are constructed of brass with gold finish.
Radiall, Rosny Sous Bois, Cedex, France (33) (1) 49 35 35 35.
90° Quadrature Hybrid
This 90° quadrature hybrid is part of the company's TELEPAC series telecommunications-focused hybrids and couplers. The unit operates over the 800 to 960 MHz frequency range and offers insertion loss of 0.2 dB (max), SWR of 1.29 (max) and isolation of 20 dB (min). Average power handling is 250 W CW. Alternate connector requirements are available upon request. Typical applications include combining stages within balanced amplifiers, as well as providing channel paths between transmitters, receivers and antennas. Size: 3.47" x 1.01" x 1.06" plus four type-N connectors.
Sage Laboratories Inc., Natick, MA (508) 653-0844.
Straight and Right-angle Connectors
These three new series of straight and right-angle connectors employ new cost-cutting designs to simplify the assembly process. The first series involves straight connectors with pre-assembled parts. Special latching systems maintain the captivation required in accordance with international standards and enable the systems to combine body, insulators and ring nuts into a pre-assembled unit. The second series use an angled insulation displacement contact (IDC) cable connector, where a new IDC technique eliminates critical processing steps, such as stripping the coaxial cable or soldering connectors to it. The third series involves a new quick-lock system, which can be used as an alternative to threaded couplings.
Siemens Electromechanical Components, Munich, Germany 01344 396696.
These high reliability, thin-film chip attenuators have been designed with properties that make them suitable for RF/microwave applications, particularly base stations, antennas, power dividers and power amplifiers, where reduction in an electrical signal is required. The compact, lightweight components are available with attenuation factors of 1 to 20 dB in 0.5 dB increments. The frequency range is from DC to 18 GHz with SWR as low as 1.2, depending on size, style and frequency. Available tolerances are ±0.5 and ±1 dB. Two standard case sizes are available: 0.100" x 0.050" x 0.015" and 0.150" x 0.125" x 0.015". Units are available in solderable, and epoxy- and wire-bondable types. Price: $1.25 each (production quantities). Delivery: eight to 10 weeks (ARO).
State of the Art Inc. (SOTA), State College, PA (800) 458-3401.
90° Medium-power Broadband Hybrid
The model HQ 522 90° medium-power broadband hybrid operates over the frequency range from 500 to 2000 MHz and has power-handling capabilities of 50 W with an insertion loss specification of 0.5 dB (max). SWR is 1.30 (max) and isolation is 18 dB (min). A phase and amplitude balance of 3° and 1 dB, respectively, are typical. SMA connectors are standard. Size: 2.75" x 4.00" x 0.38". Prices: start at $325. Delivery: eight to 10 weeks.
Technical Research and Manufacturing Inc. (TRM), Bedford, NH (603) 627-6000.
AC Solid-state Relays
The BR series AC solid-state relays are designed for high voltage and current applications requiring Faston terminations. The units employ 0.250 Faston connection terminals, which result in a 25 percent footprint reduction and lower labor costs when compared to other similarly rated relay packages. The series is optically isolated to 4000 V between input and output. The model BR1200480D55 DC-controlled AC solid-state relay is capable of controlling up to 55 A RMS at a 480 V line voltage. The relay features a logic-compatible control and zero-voltage turn on through back-to-back silicon-controlled rectifiers capable of withstanding 1200 V transients. Other versions in the series offer AC control (90 to 280 V AC) and random turn on. Prices: start at $16.40 (250). Delivery: stock to five weeks.
Teledyne Relays, Scottsdale, AZ (602) 443-1288.
10 W Fixed Termination
The model HTF-510 fixed termination operates over the frequency range from DC to 12.4 GHz. Average input power is rated at 10 W, with the peak power rated at 500 W (max). Available connector options include SMA and N.
Trilithic Inc., Indianapolis, IN (800) 344-2412 or (317) 895-3600.
30 pF Multiturn Trimmer Capacitor
This 30 pF multiturn trimmer capacitor uses a patented solid polytetrafluoroethylene dielectric design to withstand 5000 V DC and cannot short out. The unit offers 10 turns of linear tuning and Q is > 2000 at 100 MHz. The O-ring seal withstands 40 psi. Panel-mount, stripline, vertical or horizontal PC styles are available. Size: 0.5" x (length) 0.3" (dia). Price: $11.18 (1000). Delivery: 10 days (up to 100-piece quantities), two months (production lots).
Voltronics Corp., Denville, NJ (973) 586-8585.
Medium-power Fixed Coaxial Attenuators
The models 77 and 78 medium-power fixed coaxial attenuators operate over the frequency range from DC to 5 GHz and have nominal attenuations of 3, 6, 10, 20 and 30 dB. Nominal impedance is 50 W. Both models offer a temperature coefficient of < 0.0004 dB/dB/°C and operate over the temperature range from -55° to +125°C. Power rating and power coefficient for the model 77 are 25 W and < 0.002 dB/dB/W, respectively. Power rating and power coefficient for the model 78 are 50 W and < 0.001 dB/dB/W, respectively. The units are optimized for wireless original equipment manufacturer and test applications. Custom designs are available.
Weinschel Corp., Frederick, MD (800) 638-2048 or (301) 831-4701.
0.047" Flexible Microwave Cable
This small-diameter flexible microwave cable can be teamed with GPO, GPPO and other connector types such as OSMM and 2.4 mm. The combination of the GPO or GPPO connector and this new 0.47" (4L) cable provides the highest density microwave (DC to 18 GHz) cable for both scanning electron microscopes and custom modules in airborne and space applications. The cable features a weight of 3 g/ft (nom) and a 1/4" multiple-bend radius (1/8" single bend). Typical attenuation is 1.6 dB/ft at 18 GHz with a guaranteed insertion loss of 2 dB for a one-foot assembly. The cable uses the company's helically wrapped foil outer conductor, which provides 90 dB/ft screening effectiveness (often necessary for high density packages), and is a good alternative to stiffer, short, semirigid assemblies that are difficult to install or repair in tight spaces.
W.L. Gore & Associates Inc., Newark, DE (800) 356-4622.
Surface-mount Chip Inductors
The GLZ series SURFCOIL" surface-mount chip inductors features 20 models, which are constructed by laser cutting a copper helix deposited on an alumina core. The terminals are nickel plated with a solder coat. The inductance range is 1 to 39 nH, and standard tolerance is ±5 percent (±0.3 nH for an inductance < 5.6 nH). The units offer high Q at microwave frequencies and have a high self-resonant frequency (up to 6 GHz). The inductors are packaged in 3000-piece reels. Size: 1.0 x 0.5 x 0.5 mm (0402 size). Price: 32¢ each (single-reel quantities). Delivery: eight weeks.
Sprague-Goodman Electronics Inc., Westbury, NY (516) 334-8700.