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Linear Tech's new RS-232 transceivers provide low voltage

Posted: 25 Apr 2005 ?? ?Print Version ?Bookmark and Share

Keywords:linear technology? rs-232 transceiver? transceiver? ltc2801? ltc2802?

Linear Technology Corp. rolled out a family of single and dual RS-232 transceivers that operate over an input supply range from 1.8V to 5.5V. The products' low voltage accommodates systems powered from two alkaline, NiCd or NiMh cells, or systems that interface directly to a low voltage logic supply. According to Linear Tech, this is beneficial for applications ranging from board-level diagnostics to portable instruments.

Offering low 1?A shutdown current and a 15?A receiver-active current, the new chips are an attractive solution for any application that communicates through the RS-232 interface. The LTC2802 and LTC2804 support up to 1Mbps data rates for proprietary diagnostic links, and the LTC2801 and LTC2803 are capable of rates as high as 250kbps.

The ICs integrate a boost converter for generating the required RS-232 output signal levels. Control pins invoke optional Shutdown, Receiver Active and Driver Disable features. The 10kV ESD protection on the RS-232 pins guards against electrostatic discharges that can be encountered during operation, while eliminating the need for external components.

The LTC2801 and LTC2802 are single transceivers, offered in a 3-by-4mm DFN package, while the LTC2803 and LTC2804 are dual transceivers offered in 16-lead SSOP and 16-lead DFN packages. Specified over both commercial and industrial temperature ranges, these devices and available from stock with pricing beginning at $1.60 each in 1,000-piece quantities.

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