ICL3244ECA-TS2705

Overview

The Intersil ICL3244ECA-TS2705 is a low-power RS-232 transceiver designed for operation with supply voltages ranging from +3V to +5.5V. It integrates four drivers and four receivers, providing full compliance with EIA/TIA-232 and V.28/V.24 specifications even at the lower 3.0V supply limit. The device incorporates efficient on-chip charge pumps to generate the necessary internal voltages without requiring external inductors. Key electrical characteristics include a data rate capability of up to 125kbps and enhanced electrostatic discharge (ESD) protection rated at ±15kV for human body model and ±15kV for air gap discharge on all RS-232 I/O pins.

Feature Summary

• Integrated four-driver and four-receiver architecture for comprehensive serial communication interfaces
• Enhanced ESD protection on RS-232 pins ensuring robustness against electrostatic discharge events
• On-chip charge pump circuitry eliminates the need for external inductors or transformers
• Automatic powerdown functionality significantly reduces standby current consumption

Applications

• Portable computing devices such as PDAs and palmtops requiring low standby power
• Notebook and laptop computers utilizing mixed 3.3V and 5V logic systems
• ISDN terminal adaptors and peripheral interface connections
• Industrial control systems operating within commercial temperature ranges

Procurement Notes

Verify the specific suffix TS2705 against manufacturer documentation to confirm tape-and-reel packaging configuration and lot traceability. Ensure the component meets RoHS compliance requirements if mandated by the target assembly process. Cross-reference the exact part number with official distributor catalogs to validate availability and lead times prior to procurement planning.

Selection Notes

Select this component when a quad-channel RS-232 interface is required for 3V to 5.5V systems. It serves as a suitable replacement for legacy parts like the MAX244 or HIN234 in space-constrained designs. Consider the 125kbps speed limit and commercial temperature range during system design. Verify that the package type matches the PCB footprint constraints of the application.

Part Context

This device belongs to the Intersil ICL32XXE family of low-power RS-232 transceivers. The family shares common architectural features including automatic powerdown and high ESD protection. The ICL3244 variant specifically provides four drivers and receivers, distinguishing it from dual-channel counterparts like the ICL3223 or single-channel variants. It is manufactured using CMOS technology for reduced power dissipation.

Replacement Considerations

Publicly confirmed direct substitutes include the Maxim MAX244E and the Renesas HIN234E. These components offer equivalent pinouts and functional specifications for 3V to 5.5V RS-232 applications. Verify compatibility with existing board layouts and capacitor values before implementing any substitution.