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

Description

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.