Description   

      The AT3221 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/ms driver output slew rate.

Features

Controlled Baseline– One Assembly/Test Site, One Fabrication Site 

Extended Temperature Performance of –55°C to 125°C

Enhanced Diminishing Manufacturing Sources (DMS) Support 

Enhanced Product-Change Notification

Qualification Pedigree (1)

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 mA Typical

External Capacitors . . . 4 ´ 0.1 mF

Accepts 5-V Logic Input With 3.3-V Supply 

Alternative High-Speed Pin-Compatible Device (1 Mbit/s)

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

APPLICATION INFORMATION