General Description
The MAX3250 is a 3.0V to 5.5V powered, ±50V isolated EIA/TIA-232 and V.28/V.24 communications interface with high data-rate capabilities. The MAX3250 is a dual die part that operates with up to ±50V difference between the RS-232 side and the logic side (ISOCOM to GND). This makes the device ideal for operation in noisy conditions with high common-mode voltages. This feature prevents damage to the device if RS-232 lines are inadvertently short-circuited to a +24V or ±48V power bus.

Benefits and Features
• Isolation Breaks Ground Loops Due to High CommonMode Voltages While Maintaining Data Rate
    • ±50V Isolation
    • 250kbps Guaranteed Data Rate
    • FAULT Output Signals Excessive Isolated-Side Voltage
• Integration of Isolation and RS-232 Saves Space
    • SSOP Package
• Shutdown Allows Multiple Interfaces (IrDA, RS-232, RS-485) to be Connected to the Same UART
    • High-Impedance Transmitter and Receiver Outputs in Shutdown
    • 20µA Supply Current in Shutdown
• Inductorless/Transformerless Design Simplifies EMI Compliance
• Low-Cost Replacement for Opto-Isolated Transceivers
• Meets EIA/TIA-232 Specifications Down to 3.0V

Applications
    Industrial Control
    Programmable Logic Controller
    Point-of-Sale Equipment
    PC-to-Router Connections
    Diagnostic Ports
    Telecom Equipment