MAX3221IPWR

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1. Description

The MAX3221IPWR device consists of one line driver, one line receiver with dedicated enable pin, 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 kbps and a maximum of 30-V/μs driver output slew rate. Flexible control options for power management are available when the serial port is inactive. The automatic power-down feature functions when FORCEON is low and FORCEOFF is high. During this mode of operation, if the device does not sense a valid RS-232 signal on the receiver input, the driver output is disabled and the supply current is reduced to 1 μA. The INVALID output notifies the user if an RS-232 signal is present at the receiver input.

2. Features

    1. RS-232 Bus-Pin ESD Protection Exceeds ±15 kV Using Human Body Model (HBM)

    2. Meets or Exceeds the Requirements of TIA/EIA-232-F and ITU V.28 Standards

    3. Operates With 3-V to 5.5-V VCC Supply

    4. Operates up to 250 kbps

    5. One Driver and One Receiver

    6. Low Standby Current: 1 μA Typical

    7. External Capacitors: 4 × 0.1 μF

    8. Accepts 5-V Logic Input With 3.3-V Supply

    9. Alternative High-Speed Pin-Compatible Device (1 Mbps)

        – SNx5C3221 

  10. Automatic Power-Down Feature Automatically Disables Drivers for Power Savings

3. Applications

    1. Battery-Powered, Hand-Held, and Portable Equipment

    2. Notebooks, Subnotebooks, and Laptops

    3. Digital Cameras

    4. Mobile Phones and Wireless Devices

4. Pin Configuration

5. Pin Functions

6. Packaging Materials