0
ACTIVE
Drivers per package |
1 |
Receivers per package |
1 |
Logic voltage (min) (V) |
3.3 |
Data rate (max) (Mbps) |
0.25 |
Main supply voltage (nom) (V) |
3.3, 5 |
Features |
Auto-Powerdown |
ESD HBM (kV) |
15 |
Rating |
Catalog |
Operating temperature range (°C) |
-40 to 85 |
Vout (typ) (V) |
5.4 |
SSOP (DB)-16-48.36 mm² 6.2 x 7.8
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/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.
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