MAX3222CPWR UART Interface ICc RS-232 Interface IC 3-5.5V Mult-Ch RS232

1 Features

• 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 kbps

• Two Drivers and Two Receivers

• 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 Mbps)

  – SNx5C3222

   

2 Applications

• Battery-Powered Systems

• PDAs

• Notebooks

• Laptops

• Palmtop PCs

• Hand-held Equipment

3 Description

The MAX3222 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 charge pump and four small external capacitors allow operation from a single 3-V to 5.5-V supply. The device operates at data signaling rates up to 250 kbit/s and a maximum of 30-V/μs driver output slew rate.

The MAX3222 can be placed in the power-down mode by setting PWRDOWN low, which draws only 1 μA from the power supply. When the device is powered down, the receivers remain active while the drivers are placed in the high-impedance state. Receiver outputs also can be placed in the high- impedance state by setting EN high.

Device Information