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 RS32 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 

    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 V_CC 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