ICL3237CA-T

Overview

The ICL3237CA-T is a single-supply RS-232 transceiver manufactured by Renesas Electronics Corporation, operating from +3V to +5.5V. It integrates five drivers and three receivers with an additional always-active noninverting monitor receiver for wake-up capability. The device supports selectable data rates of 250kbps or 1Mbps via the MBAUD pin. It features manual powerdown functionality that reduces supply current to 1µA. The component utilizes on-chip charge pumps requiring only four external capacitors and provides ±15kV ESD protection on RS-232 pins.

Feature Summary

• Integrated manual powerdown control minimizes standby power consumption
• Includes a dedicated noninverting monitor receiver for continuous signal monitoring
• Pin-selectable data rate configuration allows optimization for speed versus load conditions
• On-board voltage conversion eliminates the need for external dual-polarity supplies

Applications

• Battery-powered portable equipment such as PDAs and Palmtops
• Laptop and notebook computer serial communication ports
• Cellular and mobile phone interfaces
• Digital cameras and peripheral devices requiring RS-232 connectivity

Procurement Notes

Verify the specific suffix 'CA' indicates the commercial temperature range of 0°C to 70°C. Confirm the '-T' suffix corresponds to tape and reel packaging requirements. Ensure the ordering part number matches the exact package type and moisture sensitivity level specified in the manufacturer's documentation before finalizing procurement.

Selection Notes

Select this component when system design requires low quiescent current and manual shutdown control rather than automatic powerdown. Verify that the application logic can manage the SHDN and EN pins to achieve desired power states. Ensure the external capacitor values align with the specific VCC voltage to maintain stable charge pump operation and meet EIA/TIA-232 specifications.

Part Context

This device belongs to the Intersil ICL32XX family of 3V RS-232 transceivers. It serves as a drop-in replacement for the MAX3237. The ICL3237 variant specifically provides five drivers and three receivers, distinguishing it from other family members with different driver/receiver counts or automatic powerdown features.

Replacement Considerations

The datasheet identifies the MAX3237 as a compatible drop-in replacement. Verify pinout compatibility and electrical parameter alignment between the ICL3237CA-T and the substitute part number before implementation.