The MAX3222/MAX3232/MAX3237/MAX3241 are 4-wire serial communication chips with a proprietary low-dropout transmitter output stage that supports the RS-232 standard protocol and can operate at a supply voltage of 3.0V to 5.5V.
The Maxim Integrated Products data sheet describes a family of RS‑232 transceivers that operate from 3.0 V to 5.5 V and require only four 0.1 pF external charge‑pump capacitors. The devices provide true RS‑232 voltage levels, low‑power operation, and optional MegaBaud mode for higher data rates.
Key features include dual charge‑pump voltage conversion, shutdown mode with sub‑picoampere current draw, and compatibility with standard MAX232 pinouts. Package options are available in TSSOP and SSOP formats, and the document provides detailed electrical, timing, and pin‑configuration specifications.
| Supply voltage range | 3.0 V to 5.5 V |
|---|---|
| Maximum data rate (normal mode) | 120 kbps (MAX3222, MAX3232, MAX3241) |
| Maximum data rate (MAX3237 normal mode) | 250 kbps |
| Shutdown supply current | < 1 pA |
| Drivers / Receivers (MAX3222) | 2 drivers, 2 receivers |
| Package options | TSSOP and SSOP |
They operate from 3.0 V up to 5.5 V.
The shutdown supply current is less than 1 pA.
The MAX3222 includes 2 drivers and 2 receivers.