5-V MULTICHANNEL RS-232 LINE DRIVER/RECEIVER WITH +/-15-kV ESD PROTECTION

The MAX211 device consists of four Line Drivers five line rec 1668 eivers, 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 5-V supply. The devices operate at data signaling rates up to 120 kbit/s and a maximum of 30-V/s driver output slew rate.
The MAX211 has both shutdown (SHDN) and enable control (EN). In shutdown mode, the Charge Pumps are turned off, V+ is pulled down to VCC, V? is pulled to GND, and the transmitter outputs are disabled. This reduces supply current typically to 1 A. EN is used to put the receiver outputs into the high-impedance state to allow wired-OR connection of two RS-232 ports. It has no effect on the RS-232 drivers or the Charge Pumps
By Texas Instruments