UT3222 Datasheet, PDF (1/7 Pages) Unisonic Technologies – 3V TO 5.5V MULTICHANNEL RS-232 LINE TRANSCEIVERS WITH ±15kV ESD PROTECTION

UNISONIC TECHNOLOGIES CO., LTD
UT3222
Preliminary
3V TO 5.5V MULTICHANNEL
RS-232 LINE TRANSCEIVERS
WITH ±15kV ESD PROTECTION
 DESCRIPTION
The UTC UT3222 have two receivers and two transmitters, and a
dual charge-pump circuit with ±15kV ESD protection pin to pin
(serial-port connection pins, including GND). 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 3V to 5.5V supply. The
device operates at data signaling rates up to 250 kbit/s and a
maximum of 30V/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 V_CC and V− is raised toward GND. Receiver outputs also
can be placed in the high-impedance state by setting EN high.
 FEATURES
* RS-232 Bus-Pin ESD Protection Exceeds±15 kV Using
Human-Body Model (HBM)
* Meets or Exceeds the Requirements of TIA/EIA-232-F and
ITU v.28 Standards
* Operates With 3V to 5.5V V_CC Supply
* Operates Up To 250 kbit/s
* Two Drivers and Two Receivers
* Low Standby Current 1μA Typical
* External Capacitors 4×0.1μF
* Accepts 5V Logic Input With 3.3V Supply
 ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
UT3222L-P20-T
UT3222G-P20-T
UT3222L-P20-R
UT3222G-P20-R
Package
TSSOP-20
TSSOP-20
CMOS IC
TSSOP-20
Packing
Tube
Tape Reel
www.unisonic.com.tw
Copyright © 2013 Unisonic Technologies Co., Ltd
1 of 7
QW-R502-986.a