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 VCC = 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.

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 VCC = 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 State . . . . . 1µA

• 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