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LTC2803 - 1.8V to 5.5V RS-232 Single and Dual Transceivers

The LTC2801/LTC2802/LTC2803/LTC2804 are single and dual RS-232 transceivers in narrow SSOP and chip-scale DFN packages. All operate over a supply range of 1.8V to 5.5V, which permits operation directly from two alkaline, NiCd or NiMH cells. An integrated DC-to-DC converter generates power supplies for driving RS-232 levels. A logic supply pin allows easy interfacing with different logic levels independent of the DC-DC supply.

These parts are compatible with the TIA/EIA-232-F standard. Driver outputs are protected from overload and can be shorted to ground or up to ±15V without damage. To extend battery life, receivers can be kept active, operating at reduced speed, with only 15μA current. In shutdown mode, current is further reduced to 1μA.

Features 1.8V to 5.5V Supply Voltage Single and Dual Transceivers High-Speed Operation 1Mbps for 250pF/3kΩ Load (LTC2802, LTC2804) 250kbps for 1nF/3kΩ Load 100kbps for 2.5nF/3kΩ TIA/EIA-232-F Load Low-Power 1μA Shutdown and 15μA Receivers- Active Modes No Damage or Latchup to ±10kV ESD on RS-232 Interface Logic Supply Pin for Easy Level-Shifting to UART or Microprocessor Low-Latency Output Enable Allows Line Sharing and Half-Duplex Operation True RS-232 Compliant Output Levels Small Footprint: LTC2801/LTC2802 4mm × 3mm DFN Package LTC2803/LTC2804 Narrow SSOP-16 and 5mm × 3mm DFN Packages Typical Application

Applications Battery-Powered Systems Computers and Consumer Electronics Diagnostic Ports Packaging

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