UNISONIC TECHNOLOGIES CO., LTD
UT3223
Preliminary
CMOS IC
+3.0V TO +5.5V POWER SUPPLY,
250KBPS, MULTICHANNAEL
RS-232 LINE
DRIVERS/RECEIVERS
DESCRIPTION
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.
FEATURES
* Operates With 3.0V~5.5V Power Supply
* Two Drivers and Two Receivers
* Operates Up To 250 kbps
* External Capacitors (4*0.1µF)
* Accepts 5.0V Logic Input With 3.3V Supply
* Serial-Mouse Drivability
* Designed to Transmit at a Data Rate of 250 kbps
* Low Standby Current (1µA Typical)
* Exceeds ±8KV ESD Protection(HBM) for RS-232 I/O Pins
ORDERING INFORMATION
Ordering Number
Package
Packing
Lead Free
Halogen Free
UT3223L-R20-R
UT3223L-P20-R
UT3223G-R20-R
UT3223G-P20-R
SSOP-20
Tape Reel
Tape Reel
TSSOP-20
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