UT3222

DESCRIPTION 

The UTC UT3222 have two receivers and two drivers, and a dual 

charge-pump circuit. The device meets the requirements of

TIA/EIA-232-F and provides the electrical interface between an

asynchronous communication controller and the serial-port connector. 

The charge pump and four small external capacitors allow operation 

from a single 3.0V to 5.5V supply. The device operates at data

signaling rates up to 250kbit/s and a maximum of 35V/μs driver output 

slew rate. 

The UTC UT3222 can be placed in the power-down mode by 

setting PWRDOWN low, which draws only 1μA from the power 

supply. When the device is powered down, the receivers remain 

active while the drivers are placed in the high-impedance state. Also, 

during power down, the onboard charge pump is disabled; V+ is 

lowered to VCC and V− is raised toward GND. Receiver outputs also 

can be placed in the high-impedance state by setting EN high. 

FEATURES

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

* Meets the Requirements of TIA/EIA-232-F and ITU V.28 Standards

* Operates With 3.0V to 5.5V VCC Supply 

* Operates Up To 250kbit/s Data Rate 

* Two Drivers and Two Receivers 

* Low Standby Current 1μA Typical 

* External Capacitors 4×0.1μF 

* Accepts 5.0V Logic Input With 3.3V Supply 

规格书UT3222