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Home > Interface and Driver Circuit
UT3223 Datasheet


The UTC UT3223 consists of 2 drivers and 2 receivers. 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
250kbps provides compatibility with popular software for communicating
with PCs.
The UTC UT3223 achieves 1μA supply current in shutdown condition.
When the UT3223 doesn’t detect a valid signal level on its receiver inputs,
the on-board power supply and drivers will shutdown, and when a valid
level is applied to any RS-232 receiver input, then the system turns on
again. Therefore, the system saves power without changes to the existing
BIOS or operating system.
The UTC UT3223 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.
* Operates With 3.0V~5.5V Power Supply
* Two Drivers and Two Receivers
* Operates Up To 250 kbps
* Designed to Transmit at a Data Rate of 250 kbps
* 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
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