MAX3243CUI+

MAX3243CUI+ is a transceiver with auto shutdown. When the device does not sense a valid signal level on their receiver inputs, the on-board power supply and drivers shut down. This occurs if the RS-232 cable is disconnected or if the transmitters of the connected peripheral are turned off. The system turns on again when a valid level is applied to any RS-232 receiver input. This device requires only 0.1µF capacitors in 3.3V operation, and can operate from input voltages ranging from +3.0V to +5.5V. 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. It is used in applications such as battery-powered equipment, hand-held equipment, peripherals, portable diagnostics equipment.

• Supply current (auto shutdown) is 1µA typ at (VCC = 3.3V or 5.0V, TA = +25°C)
• Supply current (shutdown) is 1µA typ at (VCC = 3.3V or 5.0V, TA = +25°C)
• Input hysteresis (receiver inputs) is 0.3V typical at (VCC = +3.0V to +5.5V, C1–C4 = 0.1µF)
• Input resistance is 3Kohm typical at (VCC = +3.0V to +5.5V, C1–C4 = 0.1µF)
• Output leakage current (transmitter output) is ±25µA maximum at (TA = +25°C)
• Maximum data rate is 235Kbps typ at (RL = 3Kohm, CL = 1000pF, one transmitter switching)
• Receiver propagation delay is 0.3µs typical at (R-IN to R-OUT, CL = 150pF)
• Transition-region slew rate is 30V/µs maximum at (CL = 150pF to 1000pF)
• Operating temperature range from 0°C to +70°C
• 28-lead TSSOP package

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party