ICL3244CA

Overview

The ICL3244CA is a dual RS-232 transceiver manufactured by Harris Corporation, designed for data communication applications. It integrates two drivers and two receivers on a single CMOS chip, operating from a single +5V power supply. The device features internal charge pumps that generate the necessary positive and negative voltages for RS-232 signaling, eliminating the need for external components. It supports data rates up to 120 kbps and includes input hysteresis for noise immunity. The component is housed in a standard 16-pin plastic DIP package.

Feature Summary

• Integrated dual drivers and dual receivers for complete RS-232 interface functionality
• Internal charge pump circuitry generates required voltage levels without external capacitors
• Single +5V power supply operation simplifies system design
• Input hysteresis provides enhanced noise rejection capabilities

Applications

• Industrial control systems requiring serial communication
• Modem interfaces in embedded computing devices
• Point-of-sale terminals and barcode scanners
• Test and measurement equipment serial ports

Procurement Notes

Verify the specific suffix 'CA' indicates the ceramic DIP package variant when sourcing replacements. Confirm RoHS compliance status as older Harris batches may not meet current environmental standards. Ensure the supplier provides genuine Harris or authorized rebranded units to guarantee signal integrity and reliability in critical communication links.

Selection Notes

Select this component when a dual-channel RS-232 solution is required with minimal external bill of materials. It is suitable for designs constrained by space due to the integrated charge pump. Compare against newer CMOS alternatives if lower power consumption is a priority, as this legacy part draws higher quiescent current. Verify pin compatibility with existing PCB layouts before adoption.

Part Context

This component belongs to the ICL324x family of RS-232 transceivers produced by Harris Semiconductor, which was later acquired by Intersil and subsequently Renesas. The ICL3244 specifically denotes the dual driver/receiver configuration. These parts were widely used in the 1990s and early 2000s for PC peripheral connections and industrial serial buses before being largely superseded by more integrated multi-port solutions.

Replacement Considerations

Direct pin-compatible substitutes include the MAX3244 from Maxim Integrated and the SP3244E from Sipex. These modern equivalents offer improved performance characteristics such as lower power consumption and higher data rate support while maintaining the same functional interface.