DATASHEET
ICL3221E, ICL3222E, ICL3223E, ICL3232E, ICL3241E,
ICL3243E
The Intersil ICL32xxE devices are 3.0V to 5.5V
powered RS-232 transmitters/receivers which meet
ElA/TIA-232 and V.28/V.24 specifications, even at V
CC
= 3.0V. Additionally, they provide
±
15kV ESD
protection (IEC61000-4-2 Air Gap and Human Body
Model) on transmitter outputs and receiver inputs (RS-
232 pins). Targeted applications are PDAs, Palmtops,
and notebook and laptop computers where the low
operational, and even lower standby, power
consumption is critical. Efficient on-chip charge pumps,
coupled with manual and automatic power-down
functions (except for the ICL3232E), reduce the
standby supply current to a 1µA trickle. Small footprint
packaging, and the use of small, low value 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 3.3V and 5.0V systems, and
5.0V-only systems.
The ICL324XE are 3-driver, 5-receiver devices that
provide a complete serial port suitable for laptop or
notebook computers. Both devices also include
noninverting always-active receivers for “wake-up”
capability.
The
ICL3221E, ICL3223E and ICL3243E,
feature
an
automatic power-down
function which powers
down the on-chip power-supply and driver circuits.
This occurs when an attached peripheral device is shut
off or the RS-232 cable is removed, conserving system
power automatically without changes to the hardware
or operating system. These devices power up again
when a valid RS-232 voltage is applied to any receiver
input.
Table 1 summarizes the features of the devices
represented by this data sheet, while Application Note
AN9863
summarizes the features of each device
comprising the ICL32xxE 3V family.
FN4910
Rev 22.00
December 9, 2015
Features
• ESD Protection for RS-232 I/O Pins to
±
15kV
(IEC61000)
• Drop in Replacements for MAX3221E, MAX3222E,
MAX3223E, MAX3232E, MAX3241E, MAX3243E,
SP3243E
• ICL3221E is a Low Power, Pin Compatible Upgrade
for 5V MAX221E
• ICL3222E is a Low Power, Pin Compatible Upgrade
for 5V MAX242E, and SP312E
• ICL3232E is a Low Power Upgrade for HIN232E,
ICL232 and Pin Compatible Competitor Devices
• RS-232 Compatible with V
CC
= 2.7V
• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V
• Latch-Up Free
• On-Chip Voltage Converters Require Only Four
External 0.1µF Capacitors
• Manual and Automatic Power-Down Features
• Guaranteed Mouse Driveability (ICL324xE Only)
• Receiver Hysteresis For Improved Noise Immunity
• Guaranteed Minimum Data Rate 250kbps
• Wide Power Supply Range Single +3V to +5.5V
• Low Supply Current in Power-Down State1µA
• Pb-Free Available (RoHS Compliant)
Applications
• Any System Requiring RS-232 Communication
Ports
- Battery Powered, Hand-Held, and Portable
Equipment
- Laptop Computers, Notebooks, Palmtops
- Modems, Printers and other Peripherals
- Digital Cameras
- Cellular/Mobile Phones
Related Literature
• Technical Brief
TB363
“Guidelines for Handling and
Processing Moisture Sensitive Surface Mount
Devices (SMDs)”
FN4910 Rev 22.00
December 9, 2015
Page 1 of 33
Analogue and Mixed Signal
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