RS232 X2

The MAX3221 consists of one line driver, one line receiver, and a dual charge-pump circuit with ±15-kV ESD protection pin to pin (serial-port connection pins, including GND). The device meets the requirements of TIA/EIA-232-F and provides the electrical interface between an asynchronous communication controller and the serial-port connector. The charge pump and four small external capacitors allow operation from a single to 5.5-V supply. These devices operate at data signaling rates to 250 kbit/s and a maximum of 30-V/µs driver output slew rate.

The board incorporates two MAX3221 RS-232 components. The pcb connections are compatible with «EXPANSION BOARD ESP32 ARUAL».

Features MAX3221:

• RS-232 Bus-Pin ESD Protection Exceeds line receiver with dedicated enable pin, and a dual ±15 kV Using Human Body Model (HBM).
• Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU V.28 Standards.
• Operates With 3-V to 5.5-V VCC Supply .
• Operates up to 250 kbps.
• Low Standby Current: 1 μA Typical