ST3222E is a 3 V 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 ± 8 kV using IEC1000-4-2 Contact Discharge and ±15 kV using the Human Body Model. ST3222E has a proprietary low dropout transmitter output stage providing true RS-232 performance from 3 to 5 V supplies with a dual charge pump. The charge pump requires only four small 0.1 μF external capacitors for operation form 3 V supply. The device has two receivers and two drivers. The ST3222E features a 1 mA 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 1 mA supply current. The device is guaranteed to run at data rates of 250 Kbps while maintaining RS-232 output levels. Typical applications are Notebook, Sub-notebook and Palmtop Computers, Battery Powered Equipment, Hand-Held Equipment, Peripherals and Printers.
The STMicroelectronics ST3222E is a low-power RS-232 driver and receiver designed for notebook computers, palmtop devices, battery-powered equipment, and hand-held peripherals. It operates from a 3V to 5.5V supply using an internal charge pump that requires only four small external capacitors.
| Supply Voltage Range | 3 to 5.5 V |
|---|---|
| Data Rate | Up to 250 Kbps |
| ESD Protection (Human Body Model) | +15 kV |
| Supply Current (Shutdown Mode) | 1 mA |
The device operates from a 3V to 5.5V supply.
The device requires four small 0.1 mF external capacitors.
The device guarantees a minimum data rate of 250 Kbps.