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 3-V to 5.5-V supply. These devices operate at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew rate.
RS-232 Bus-Pin ESD Protection Exceeds ±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 kbit/s
One Driver and One Receiver
Low Standby Current...1 µA Typical
External Capacitors...4 ×0.1 µF
Accepts 5-V Logic Input With 3.3-V Supply
Alternative High-Speed Pin-Compatible Device (1 Mbit/s)
− SNx5C3221
Auto-Powerdown Feature Automatically Disables Drivers for Power Savings
Applications
− Battery-Powered, Hand-Held, and Portable Equipment