MAX13223EEUP+T

The MAX13223E is a +3.0V to +5.5V -powered EIA/TIA-232 and V.28 communications interface with fault protection on the RS-232 line interface. This allows shorts of the transmitter outputs and receiver inputs to voltages in the ±70V range without adversely affecting the MAX13223E. The MAX13223E achieves 1μA supply current using Maxim’s AutoShutdown feature. The MAX13223E automatically enters a low-power shutdown mode when the RS-232 cable is disconnected or the receivers are inactive. The device turns on again when a valid transition at any receiver input is sensed. A proprietary, high-efficiency, dual charge-pump power supply and a low-dropout transmitter combine to deliver true RS-232 performance from a single +3.0V to +5.5V supply. The MAX13223E has two receivers and two drivers and is guaranteed to run at data rates of 250kbps for one transmitter switching while maintaining RS-232 output levels. The MAX13223E operates from input voltages ranging from +3.0V to +5.5V and is available in a 20-pin, 6.5mm×4.4mm, TSSOP package. The MAX13223E is specified over the -40°C to +85°C temperature range.

Applications

• Telematics Equipment
• Base Stations
• Utility Meters
• Industrial Equipment
• Telecomm Equipment
• POS Terminal Equipment

Key features

• Robust Protection to Withstand Load Dumps, Miswiring, and Connector Failures
• ±70V Fault Protection
• Overvoltage Current Limiting
• Current Protection at Transmitter Outputs
• Thermal Shutdown Protection
• Flexible Power Requirements Simplify Design
• +3.0V to +5.5V Single Supply Voltage
• True RS-232 Performance (Up to 250kbps) Even from +3.0V Supply Voltage
• AutoShutdown Simplifies Power Savings
• Automatically Enters Shutdown Mode if RS-232 Cable is Disconnected or Receivers are Inactive
• Automatically Activates from Shutdown When Any Valid Transition is Sensed
• 1μA Typical Shutdown Current