1

®

FN6003.3

ICL3237

1 Microamp Supply-Current, +3V to +5.5V,

1Mbps, RS-232 Transmitters/Receivers

The Intersil ICL3237 contains 3.0V to 5.5V powered RS-232

transmitters/receivers which meet ElA/TIA-232 and

applications are cell phones, 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 powerdown

function, reduce the standby supply current to a 1

µA trickle.

Small footprint packaging, and the use of small, low value

capacitors ensure board space savings as well. Data rates

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 ICL3237 is a 5 driver, 3 receiver device that also

includes a noninverting always-active receiver for “wake-up”

capability.

Table 1 summarizes the features of the device represented

by this data sheet, while Application Note AN9863

summarizes the features of each device comprising the

ICL32XX 3V family.

Features

• Drop in Replacement for MAX3237

• Meets EIA/TIA-232 and V.28/V.24 Specifications at 3V

• Latch-Up Free

• On-Chip Voltage Converters Require Only Four External

Capacitors

• Manual Powerdown Features

• Flow Through Pinout

• Receiver Hysteresis For Improved Noise Immunity

• Pin Selectable Data Rate

• Guaranteed Minimum Data Rate . . . . . . . 250kbps/1Mbps

• Guaranteed Minimum Slew Rate . . . . . . . 6V/

µs or 24V/µs

• Wide Power Supply Range . . . . . . . Single +3V to +5.5V

• Low Supply Current in Powerdown State. . . . . . . . . . .1

µA

•

Pb-Free Plus Anneal 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 Phone

Related Literature

• Technical Brief TB363 “Guidelines for Handling and

Processing Moisture Sensitive Surface Mount Devices

(SMDs)”

• AN9863 “3V to +5.5V, 250k-1Mbps, RS-232

Transmitters/Receivers”

TABLE 1. SUMMARY OF FEATURES

PART

NUMBER

NO. OF

Tx.

NO. OF

Rx.

NO. OF

MONITOR Rx.

(NOTE 1)

DATA

RATE

(kbps)

Rx. ENABLE

FUNCTION?

READY

OUTPUT?

MANUAL

POWER-

DOWN?

AUTOMATIC

POWERDOWN

FUNCTION?

ICL3237

5

3

1

250/1000

YES

NO

YES

NO

NOTE:

1. Data rate is selectable via the MBAUD pin.

Data Sheet

October 21, 2005

CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.

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