The MAX3221/MAX3223/MAX3243 are 3V-powered EIA/TIA-232 and V.28/V.24 communications interfaces intended for notebook computer applications.
The MAX3221, MAX3223, and MAX3243 are single‑supply RS‑232 transceivers designed for notebook, sub‑notebook, and handheld applications. They feature Maxim’s AutoShutdown technology, which reduces supply current to 1 pA when no valid RS‑232 signal is present, saving power without BIOS changes.
The devices operate from a +3.0 V to +5.5 V supply, require only 0.1 pF external capacitors, and guarantee a 120 kbps data rate with a minimum slew rate of 6 V/µs. They are offered in multiple packages, including 16‑pin SSOP/TSSOP for the MAX3221 and 20‑pin DIP/SSOP/TSSOP for the MAX3223, as well as a 28‑pin wide‑SO/SSOP/TSSOP for the MAX3243.
| Supply Current (AutoShutdown) | 1 pA |
|---|---|
| Supply Voltage Range | +3.0 V to +5.5 V |
| Guaranteed Data Rate | 120 kbps |
| Minimum External Capacitor | 0.1 pF |
| Minimum Slew Rate | 6 V/µs |
The devices draw only 1 pA of supply current when AutoShutdown is active.
They operate from a supply voltage of +3.0 V up to +5.5 V.
The MAX3221 series guarantees a data rate of 120 kbps.