UM3221E_16 Datasheet, PDF (1/16 Pages) Union Semiconductor, Inc. – Fail-Safe, Single Supply RS-232 Transceivers

UM3221E/UM3222E/UM3232E
Fail-Safe, Single Supply RS-232 Transceivers
UM3221E/UM3222E/UM3232E
General Description
The UM3221E/UM3222E/UM3232E series are 3.3V powered RS-232 transceivers intended for
portable or hand-held applications. The UM3221E has one driver/one receiver while the
UM3222E/UM3232E has two drivers/two receivers. The device features low power consumption,
high data-rate capability and enhanced ESD protection. The ESD rating of all transmitter outputs
and receiver inputs is ±15kV for both human body mode and IEC61000-4-2 air discharge methods,
and over ±8kV for IEC61000-4-2 contact discharge methods. The logic I/O pins are protected to
±2kV for human body mode.
Small footprint, low profile package and the use of small 0.1μF capacitors ensure board space
savings as well. Data rates greater than 250kbps are guaranteed at worst case load conditions. This
family is fully compatible with 3.3V-only systems, mixed 1.8V and 3.3V systems, mixed 3.3V and
5.0V systems and 5.0V-only systems.
The UM3221E/UM3222E has a low-power shutdown mode where the devices’ driver outputs and
charge pumps are disabled. During shutdown, the supply current falls to less than 1μA that
reduces power consumption in battery-powered portable systems or other low power consumption
systems. The UM3221E/UM3222E receivers remain active in shutdown mode, allowing
monitoring of external signals.
The UM3221E/UM3222E and UM3232E are pin, package, and functionally compatible with the
industry standard MAX242 and MAX 232, respectively.
Applications
Features
 Industrial Automation Equipments
 Battery-Powered Equipments
 Hand-Held Equipments
 POS Terminals
 Meets True EIA/TIA-232-F Standards from a
+3.0V to +5.5V Power Supply
 Meets EIA/TIA-562 Levels of ±3.7V with
Supply Voltages as Low as 2.7V
 Enhanced ESD Specifications:
±15kV Human Body Mode
±15kV IEC61000-4-2 Air Discharge Mode
±8kV IEC61000-4-2 Contact Discharge Mode
 1μA Low Power Shutdown
(UM3221E/UM3222E)
 250kbps Minimum Transmission Rate
 Guaranteed 30V/μs Max Slew Rate
 Latch-Up Performance Exceeds 200mA
 Hot Swap and Fail-Safe
 I/O Logic Compatible with 1.8V Logic @
V_CC=3.3V
________________________________________________________________________
http://www.union-ic.com Rev.09 Mar.2016
1/16