UNISONIC TECHNOLOGIES CO., LTD
UT3221/E
CMOS IC
+3.0V TO +5.5V POWER
SUPPLY, 250KBPS,
MULTICHANNAEL RS-232
LINE DRIVER/RECEIVER
DESCRIPTION
The UTC UT3221/E 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 250kbps provides compatibility with
popular software for communicating with PCs.
The UTC UT3221/E achieves 1µA supply current in shutdown
condition. When the UT3221/E doesn’t detect a valid signal level
on its receiver input, the on-board power supply and driver will
shutdown, and when a valid level is applied to 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 UT3221/E 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 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
UT3221L-R16-R
UT3221L-P16-R
UT3221EL-R16-T
UT3221EL-P16-T
UT3221G-R16-R
UT3221G-P16-R
UT3221EG-R16-T
UT3221EG-P16-T
SSOP-16
TSSOP-16
SSOP-16
TSSOP-16
Tape Reel
Tape Reel
Tape Reel
Tape Reel
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