DESCRIPTION

The UTC UTRS3227  consists of 1 driver and 1 receiver. It meets

ElA/TIA-232 and V.28/V.24  specifications, it  intended for notebook

computer applications. A high-efficiency, dual charge-pumps power

supply and a low-dropout transmitter combine to deliver true RS-232

performance from a single +3.0V~+5.5V power supply. A guaranteed

data rate of 1Mbps for high speed applications such as

communicating with ISDN modems.

The UTC  UTRS3227 achieves 1µA supply current in shutdown

condition. The UTC  UTRS3227 automatically enter a low-power

shutdown mode when the RS-232 cable is disconnected or the

transmitters of the connected peripherals are inactive, and the UART

driving the transmitter inputs is inactive for more than 30 seconds.

The UTC UTRS3227 turn on again when they sense a valid transition at

any transmitter or receiver input.  

The UTC  UTRS3227 requires only 0.1µF capacitors in 3.3V

operation, and can operate from input voltages ranging from +3.0V

~+5.5V. it is ideal for 3.3V-only  systems, 5.0V-only systems, or

mixed 3.3V and 5.0V systems that require true RS-232 performance.

FEATURES

* Operates With 3.0V to 5.5V Power Supply

* One Driver and one Receiver

* Operates Up To 1Mbps

* Designed to Transmit at a Data Rate of 1Mbps

* Low Standby Current (1µA Typical)

* External Capacitors (4×0.1µF)

* Accepts 5.0V Logic Input With 3.3V Supply

* Serial-Mouse Drivability

* Exceeds ±8KV ESD Protection(HBM) for RS-232 I/O Pins