Electronic Design

Passive Components

Earth-Friendly Lead-Free Inductors Improve Performance
The HFI and the HFC are a pair of lead-free, high-frequency, surface-mount (multilayer and wound) inductors. They meet the 2005 lead-free requirements as well as other mandatory environmental protection standards. Removing the lead doesn't just help the ecology, though. It also improves the heat-resistance property for reflow (paste) soldering, allowing higher melting points for the solder to significantly shrink the process window.

These inductors have been designed for digital radios, cell phones, pagers, and other mobile communications devices that require a wide range of frequency and inductance. This technology also enables electronic components to withstand lead-free soldering conditions at high temperatures.

In 100,000-unit quantities, the HFI costs $0.12, and the HFC costs $0.15. Both have a 12- to 14-week lead time.

JARO Components Inc., 6600 Park of Commerce Blvd., Boca Raton, FL 33487; (561) 241-6700, ext. 307; fax (561) 241-3328; www.jaro1.com.

Convection-Cooled Attenuators Rated For 3 W Of Continuous Power
The 3-A-MFB-XX line of convection-cooled attenuators boast a 3-W continuous-power rating. These BNC attenuators also have an ambient temperature ranging from −40°C to 40°C. They feature a frequency range and VSWR from dc to 1 GHz at 1.10:1 maximum and 1 to 4 GHz at 1.25:1 maximum. According to the manufacturer, these figures make the series ideal for cellular, PCS, lab, and field environments. The attenuators' standard attenuation values are 1, 2, 3, 6, 10, 20, and 30 dB. BNC male and female connectors are available.

Contact the company for pricing and availability information.

Bird Component Products, 10950 72nd St. N, Ste. 107, Largo, FL 33777-1527; (727) 547-8826; fax (727) 547-0806; Internet: www.birdfla.com.

Pair Of Filter/Isolation Modules Supports HomePNA 2.0 Chip Sets
A pair of bandpass filters, the SF5770T and B6013, provide safety isolation and electromagnetic interference suppression. By doing so, they support the Home Phoneline Networking Alliance's (HomePNA's) 10-Mbit/s standard, 2.0 specification. Also, they meet UL 1950's requirements. EMI common mode rejection allows the system level circuit to meet FCC Part 15 emission regulations.

The filters' insertion loss is less than 2.0 dB. They prevent interference with home-network operation by attenuating signals outside the 4- to 10-MHz range. Their average return loss is better than −12 dB. Attenuation reaches −60 dB at 1.1 MHz, −35 dB at 22 MHz, and −50 dB at 54 MHz. Clean signal operation is supported by 1500-VRMS isolation and 40-dB common-to-differential-mode rejection.

Available in tube or optional tape-and-reel packaging, the SF5770T and B6013 cost $1.75 in 100,000-unit quantities. Other volume discounts are available.

Pulse, 12220 World Trade Dr., San Diego, CA 92128; (858) 674-8100; fax (858) 674-8262; www.pulseeng.com.

Self-Leaded Inductors Cut Space In Power-Supply Applications
According to their manufacturer, the DR338 series of inductors has high dc current handling capabilities for superior dc-dc power-supply filtering. These self-leaded, surface-mount inductors also target dc-dc converter and switching power-supply applications. Their low-profile, flat-top design suits them for pick-and-place manufacturing. Also, their 10- to 470-µH (±20%) inductance range and 3.6- to 0.53-A rated current can be useful in laptops, PCs, telecommunications, and instrumentation. They measure 0.5 by 0.4 in., with a 0.22-in. maximum height. Manufactured with UL94V0 materials, these inductors operate from −40°C to 85°C. They're compatible with convection and other surface-mount assembly soldering processes.

These inductors are available in tube and in tape-and-reel packaging for high-speed pick-and-place equipment. Custom inductance values are available upon request. Depending on options, products in the DR338 series cost $0.60 each in 10,000-unit quantities. High-volume OEM pricing is available. Lead time is stock to four weeks.

Datatronics, 28151 Hwy. 74, Romoland, CA 92585; (909) 928-7700; fax (909) 928-7701; www.datatronics.com.

Chip Arrays Terminate Lines To Support High FPGA Performance
According to their manufacturer, models in a line of high-speed termination chip arrays can properly terminate lines with exacting impedance matching, providing the highest possible level of field FPGA performance. These arrays have been designed to assist with the termination of high-speed lines using both the LVDS and LVPECL I/O protocols. This suits them for use in conjunction with high-speed, high-density FPGAs in instrumentation, communications, and computer equipment applications.

Each terminator has concave terminations that eliminate the possibility of solder bridging between terminals. Also, each LVDS or LVPECL terminator is available in 8- or 16-terminal versions. The arrays come packaged on tape and reel for automatic placement for use in surface-mount boards and other applications. The components come in 4000 or 5000 pieces per reel, depending on terminal count.

Production and sample quantities of the arrays are available from stock. Contact the company for detailed pricing information.

Bourns Inc., 1200 Columbia Ave., Riverside, CA 92507; (909) 781-5500; fax (909) 781-5006; www.bourns.com.

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