ICL3243EIB

Overview

The ICL3243EIB is a full-duplex RS-232 transceiver manufactured by Intersil, designed for operation with supply voltages ranging from 3V to 5.5V. It integrates three drivers and five receivers within a 28-pin SSOP package. The device supports data rates up to 250kbps and features on-chip charge pumps requiring only four external 0.1µF capacitors. Key electrical specifications include a 1µA typical standby current when in powerdown mode, 15kV ESD protection per the human body model, and receiver hysteresis of 300mV. It operates within a commercial temperature range of 0°C to 70°C.

Feature Summary

• Integrates manual and automatic powerdown functions to minimize standby power consumption.
• Includes on-chip voltage converters that eliminate the need for external inductors or transformers.
• Provides robust signal integrity through receiver hysteresis and latch-up free design.

Applications

• Portable computing devices such as PDAs and palmtops.
• Notebook and laptop computer serial communication interfaces.
• Battery-powered systems requiring low operational and standby power.

Procurement Notes

Verify the specific suffix 'EIB' against official Renesas/Intersil documentation to confirm pinout compatibility and package dimensions. Ensure the selected variant meets the required operating temperature range and RoHS compliance standards for the target application environment before finalizing procurement.

Selection Notes

Select this component for applications requiring a drop-in replacement for legacy MAX3243 devices while benefiting from lower power consumption. Consider the 28-pin SSOP footprint constraints and verify that the external capacitor requirements fit within the available board space. Confirm that the 250kbps data rate is sufficient for the intended serial communication speed.

Part Context

The ICL3243 belongs to the ICL32XX family of RS-232 transceivers developed by Intersil, now part of Renesas Electronics. This series was engineered to replace older 5V-only transceivers with efficient 3V-compatible alternatives. The ICL3243 specifically offers high channel density with three drivers and five receivers, making it suitable for complex interface designs in compact electronic devices.

Replacement Considerations

Publicly documented direct substitutes include the MAX3243EIDW and MAX3243EIDWR from Texas Instruments. These components are identified as upgrade replacements in distributor databases. Verify pin-to-pin compatibility and electrical parameter alignment before substituting.

FAQ

What is the typical standby current when the ICL3243EIB is in powerdown mode?

The typical standby supply current is reduced to 1µA when the automatic or manual powerdown feature is activated.

Does the ICL3243EIB require external inductors for its voltage conversion?

No, the device utilizes on-chip charge pumps that require only four external 0.1µF capacitors, eliminating the need for inductors.

What level of ESD protection does the ICL3243EIB provide?

The device offers 15kV ESD protection according to the Human Body Model (HBM).