MAX3221CDB

TEXAS INSTRUMENTS  MAX3221CDB  芯片, 线驱动器/接收器, RS-232

description

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 A/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

− PDAs and Palmtop PCs

− Notebooks, Subnotebooks, and Laptops

− Digital Cameras

− Mobile Phones and Wireless Devices