ICL3243ECA-T

Overview

The Intersil ICL3243ECA-T is a low-power RS-232 transceiver designed for operation with supply voltages ranging from +3.0V to +5.5V. It integrates three drivers and five receivers, supporting full-duplex communication at data rates up to 250kbps. The device features on-chip charge pumps requiring only four external 0.1µF capacitors. It includes automatic powerdown functionality that reduces standby supply current to 1µA. The component provides ±15kV ESD protection on RS-232 I/O pins and meets EIA/TIA-232 specifications at 3V. It is housed in a 28-pin SSOP package.

Feature Summary

• Integrated automatic powerdown mechanism reduces standby current to 1µA when no valid signal is detected
• On-chip dual charge pumps eliminate the need for external voltage sources, utilizing only small capacitors
• Enhanced electrostatic discharge protection rated at ±15kV on all RS-322 input and output pins
• Guaranteed mouse driveability ensures reliable performance with serial pointing devices

Applications

• Portable computers including notebooks and laptops
• Personal Digital Assistants (PDAs) and palmtop devices
• Battery-powered peripherals and handheld equipment
• Printers and other serial interface accessories

Procurement Notes

Verify the specific suffix 'ECA' against the manufacturer's official ordering guide to confirm package type and temperature range. Ensure the 'T' suffix indicates tape-and-reel packaging if required by assembly equipment. Cross-reference the Renesas or Intersil datasheet FN4900 series for exact mechanical dimensions and RoHS compliance status prior to procurement.

Selection Notes

Select this component for systems requiring low standby power and compatibility with 3.3V logic levels. It serves as a drop-in replacement for older 5V MAX3243 devices. Verify that the application requires three drivers and five receivers. Ensure the design can accommodate the necessary 0.1µF capacitors for the charge pump circuitry within the board space constraints.

Part Context

The ICL3243 belongs to the Intersil ICL32XXE family of RS-232 transceivers optimized for low-voltage operation. This family replaces legacy 5V components with lower power alternatives suitable for modern portable electronics. The ICL3243 specifically offers a high receiver count compared to standard triple-driver variants, providing flexibility in complex serial bus architectures.

Replacement Considerations

Publicly documented direct pin-compatible replacements include the MAX3243 and SP3243. When substituting, verify that the alternative component supports the same 3V operating voltage and maintains equivalent ESD protection ratings. Confirm that the replacement also supports the automatic powerdown feature if low standby current is critical.