The MAX3221E/MAX3223E/MAX3243E are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces with automatic shutdown/wakeup features, high data- rate capabilities, and enhanced electrostatic discharge (ESD) protection.
The MAX3221E, MAX3223E, and MAX3243E are 3‑V‑powered RS‑232 transceivers with automatic shutdown/wakeup, high‑data‑rate capability, and +15 kV ESD protection. They are intended for notebook, handheld, and peripheral applications such as printers and cellular phones.
Key features include Maxim’s AutoShutdown technology that reduces supply current to about 1 µA when no valid RS‑232 signals are present, dual charge‑pump voltage conversion for true RS‑232 levels, and a variety of package options (TQFN, SSOP, TSSOP). The manual provides pin descriptions, electrical and timing specifications, and wiring diagrams for proper integration.
| Maximum data rate | 250 kbps |
|---|---|
| ESD protection | +15 kV |
| Operating voltage range | 3.0 V to 5.5 V |
They operate from 3.0 V up to 5.5 V supply voltage.
The devices support a maximum data rate of 250 kbps.