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MAX13223E：±70V Fault-Protected, 3.0V to 5.5V, 2Tx/2Rx RS-232 Transceiver

Industry's First RS-232 Transceiver with Integrated ±70V Fault Protection Eliminates Need for External Protection

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 x 4.4mm, TSSOP package. The MAX13223E is specified over the -40°C to +85°C temperature range.

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

MAX13223E: Typical Operating Circuit Applications/Uses Base Stations Industrial Equipment POS Terminal Equipment Telecomm Equipment Telematics Equipment Utility Meters

DataSheet

Parametrics

Quality and Environmental Data

• MAX13223E.pdf

Ordering Information