MAX3232 RS-232 Line Driver

The charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply.

The MAX3232 device consists of two line drivers, two line receivers, 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 devices operate at data signaling rates up to 250 kbit/s and a maximum of 30-V/µs driver output slew rate.

Features of MAX3232

• 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

• Two Drivers and Two Receivers

• Low Supply Current . . . 300 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) − SNx5C3232

Applications of MAX3232

• Battery-Powered Systems

• PDAs

• Notebooks

• Laptops

• Palmtop PCs

• Hand-Held Equipment