This document introduces the features and characteristics of MAX3222E/MAX3232E/MAX3237E/MAX3241E communication interface products.
The Maxim MAX3222E, MAX3232E, MAX3237E and MAX3241E are low‑power, ESD‑protected RS‑232 transceiver ICs that operate from a 3.0 V to 5.5 V supply and support data rates up to 1 Mbps. They feature dual charge‑pump voltage conversion, shutdown mode with ultra‑low current, and optional MegaBaud operation for the MAX3237E.
The devices are offered in several small‑outline packages (SSOP, SO, TSSOP) and include two receivers and two drivers (four for the MAX3237E). Detailed electrical characteristics, timing parameters, pin descriptions and package dimensions are provided for design reference.
| Supply Voltage Range | 3.0 V to 5.5 V |
|---|---|
| Maximum Data Rate | Up to 1 Mbps |
| ESD Protection (Human Body Model) | +15 kV |
| Number of Receivers | Two receivers (four for MAX3237E) |
They support data rates up to 1 Mbps, with the MAX3237E offering MegaBaud operation at 1 Mbps under specified load conditions.
The devices are offered in 16‑Pin SSOP, 16‑Pin Wide SO, 18‑Pin Wide SO, 18‑Pin PDIP, 20‑Pin TSSOP and other small‑outline packages.
In shutdown mode the supply current falls to less than 1 µA (10 nA typ for MAX3237E) and the receivers can remain active while the charge pumps are disabled.
EN is the Receiver Enable pin; it is active low and disables the receiver outputs when asserted.