The MAX3222E consists of two line drivers, two line receivers, 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. The device operates at typical data signaling rates up to 500 kbit/s and a maximum of 30-V/µs driver output slew rate.
The MAX3222E can be placed in the power-down mode by setting the power-down ( PWRDOWN) input low, which draws only 1 µA from the power supply. When the device is powered down, the receivers remain active while the drivers are placed in the high-impedance state. Also, during power down, the onboard charge pump is disabled; V+ is lowered to VCC, and V– is raised toward GND. Receiver outputs also can be placed in the high-impedance state by setting enable ( EN) high.
| Type | Title | Date | ||
|---|---|---|---|---|
| * | Data sheet | 3-V to 5.5-V Multichannel RS-232 Line Driver and ReceiverWith ±15-kV ESD Protection datasheet (Rev. C) | PDF | HTML | 12 Jan 2023 |
| Application note | RS-232 Glossary and Selection Guide | PDF | HTML | 23 May 2023 |
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| Package | Pins | CAD symbols, footprints & 3D models |
|---|---|---|
| SOIC (DW) | 20 | Ultra Librarian |
| SSOP (DB) | 20 | Ultra Librarian |
| TSSOP (PW) | 20 | Ultra Librarian |
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