The ST3222E is a 3V powered EIA/TIA-232 and V.28/V.24 communications interface with low power requirements, high data-rate capabilities and enhanced electrostatic discharge (ESD) protection to ±8kV using IEC1000-4-2 Contact Discharge and ±15kV using the Human Body Model. The ST3222E has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 5V supplies with a dual charge pump. The charge pump requires only four small 0.1μF external capacitors for operation from a 3V supply. The device has two receivers and two drivers. The ST3222E features a 1μA shutdown mode that reduces power consumption and extends battery life in portable systems. Its receivers can remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1μA supply current. The device is guaranteed to run at data rates of 250Kbps while maintaining RS-232 output levels. Typical applications are Notebook, Subnotebook and Palmtop Computers, Battery Powered Equipment, Hand-Held Equipment, Peripherals and Printers.
The ST3222E is an EIA/TIA-232 and V.28/V.24 communications interface designed for low power requirements with enhanced electrostatic discharge (ESD) protection. It features a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 5V supplies using a dual charge pump that requires only four small external capacitors.
| Supply Voltage Range | 3 to 5.5V |
|---|---|
| Data Rate | Up to 250Kbps |
| ESD Protection (Human Body Model) | +15KV |
| ESD Protection (IEC Contact Discharge) | +8KV |
| Supply Current (No Load) | 0.3 mA |
| Shutdown Current (No Load) | 10 pA |
The device guarantees a minimum data rate of 250Kbps.
The charge pump requires only four small 0.1µF external capacitors.
The shutdown supply current is 10 pA under no load conditions at 25°C.