MAX3221IDB

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MAX3221IDB

3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver

Packaging

Package | PIN: DB | 16
Temp: I (-40 to 85)
Carrier: Partial Tube
Qty Price
1-9 $2.51
10-24 $2.25
25-99 $2.09
100-249 $1.82
250-499 $1.68
500-749 $1.41
750-999 $1.16
1000+ $1.06

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
  • 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 Mbps)
    • SNx5C3221
  • Automatic Power-Down Feature Automatically
    Disables Drivers for Power Savings

Texas Instruments  MAX3221IDB

The MAX3221 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/±s 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.