The MAX3322E/MAX3323E 3.0V to 5.5V powered EIA/TIA-232 and V.28/V.24 communications interfaces are designed for multidrop applications with low power requirements, high data-rate capabilities, and enhanced electrostatic discharge (ESD) protection.
The Maxim MAX3322E and MAX3323E are low‑power RS‑232 transceivers designed for multidrop applications. They operate from a 3.0 V to 5.5 V supply, provide pin‑selectable 5 kΩ or high‑impedance receiver inputs, and feature a separate VL logic‑level supply for mixed‑voltage systems.
Both devices include a dual charge‑pump that generates ±5.5 V output levels, deliver up to 250 kbps data rates, and are protected against up to ±15 kV ESD (Human Body Model). The MAX3322E offers a 2 Tx/2 Rx configuration in a 20‑pin TSSOP package, while the MAX3323E provides a 1 Tx/1 Rx version in 16‑pin DIP or TSSOP packages.
| Supply current (normal operation) | 1 mA |
|---|---|
| Supply voltage range (VCC) | 3.0 V to 5.5 V |
| ESD protection (Human Body Model) | ±15 kV |
| Receiver input resistance option | 5 kΩ or high‑impedance |
They operate from a VCC of 3.0 V to 5.5 V.
The MAX3322E is offered in a 20‑pin TSSOP package.