ICL3244EIB

Overview

The Intersil ICL3244EIB is a low-power RS-232 transceiver designed for operation with supply voltages ranging from 3 V to 5.5 V. It integrates three drivers and five receivers, supporting full-duplex communication at data rates up to 250 kb/s. The device features an automatic powerdown mode that reduces standby current to approximately 1 mA during idle periods. It includes on-chip charge pumps requiring only small external capacitors and provides ±15 kV electrostatic discharge (ESD) protection on all RS-232 lines. The component operates within a temperature range of -40°C to +85°C and is housed in a 28-pin SSOP package.

Feature Summary

• Integrates three independent drivers and five independent receivers for versatile multi-port serial communication
• Features automatic powerdown circuitry that minimizes standby power consumption when no valid signal is detected
• Provides robust ±15 kV ESD protection on RS-232 input/output pins to enhance reliability in harsh environments
• Utilizes efficient on-chip charge pumps to generate required voltage levels without external inductors

Applications

• Portable computing devices such as PDAs and palmtops requiring low standby power
• ISDN terminal adaptors and network interface equipment
• Laptop and notebook computer peripheral interfaces
• Industrial control systems utilizing RS-232 communication protocols

Procurement Notes

Verify the specific suffix 'B' against official Renesas/Intersil documentation to confirm material composition or tape-and-reel specifications. Ensure compatibility with RoHS directives if required by your manufacturing standards. Cross-reference the manufacturer's latest datasheet revision to confirm pinout integrity and electrical characteristics before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring multiple receiver inputs alongside fewer transmitter outputs. It is suitable for applications where low operating current and reduced standby power are critical constraints. Verify that the required data rate does not exceed 250 kb/s and that the system operates within the specified 3 V to 5.5 V voltage range.

Part Context

This part belongs to the ICL32XXE family of low-power RS-232 transceivers manufactured by Intersil, now part of Renesas Electronics. The family shares common architectural features such as automatic powerdown and high ESD protection. The ICL3244 variant specifically distinguishes itself by offering a higher receiver-to-driver ratio compared to standard quad-driver variants.

Replacement Considerations

The ICL3217EIA is a documented alternative within the same product family offering similar low-power characteristics and ESD protection levels. Verify pin-to-pin compatibility and ensure that the replacement meets the specific driver/receiver count requirements of the original design.