1

®

FN6014.2

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

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ICL3237E

±15kV ESD Protected, 10nA Supply-

Current, +3V to +5.5V, 250k/1Mbps,

RS-232 Transmitters/Receivers

The Intersil ICL3237E contains 3.0V to 5.5V powered

RS-232 transmitters/receivers which meet ElA/TIA-232 and

Human Body Model) on transmitter outputs and receiver

inputs (RS-232 pins). Targeted 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 the manual powerdown function, reduce the

standby supply current to a 10nA trickle. Small footprint

packaging, and the use of small, low value capacitors ensure

board space savings as well. Data rates greater than 1Mbps

conditions. The ICL3237E is fully compatible with 3.3V only

systems, mixed 3.3V and 5.0V systems, and 5.0V only

systems.

The ICL3237E 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

• Pin Compatible Replacement for MAX3237E

• Pin Selectable, Guaranteed Data Rate . . 250kbps/1Mbps

• 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 Feature

• Flow Through Pinout

• Rx and Tx Hysteresis For Improved Noise Immunity

• Rx Active in Powerdown; Separate Rx Enable Pin

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

µs or 24V/µs

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

• Low Supply Current in Powerdown State . . . . . . . . . .10nA

•

Pb-free available

Applications

• Any System Requiring RS-232 Communication Ports

- Battery Powered, Hand-Held, and Portable Equipment

- Laptop Computers, Notebooks, Palmtops

- Modems, Printers and other Peripherals

- Data Cradles and Cables

- Cellular/Mobile Phone

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?

ICL3237E

5

3

1

250/1000

YES

NO

YES

NO

NOTE:

1. Data rate is selectable via the MBAUD pin.

Data Sheet

July 2004