ICL3237IA

Overview

The ICL3237IA is a single-supply RS-232 transceiver operating from +3.0V to +5.5V, compliant with EIA/TIA-232 and V.28/V.24 specifications at 3.0V. It integrates five drivers and three receivers, plus one noninverting monitor receiver for wake-up capability. The device supports selectable data rates of 250kbps or 1Mbps via the MBAUD pin. It features ±15kV ESD protection on RS-232 pins, manual powerdown functionality reducing supply current to 1µA, and requires only four external capacitors. Operating temperature range is -40°C to +85°C in a 28-lead SSOP package.

Feature Summary

• Integrated charge pumps generate internal ±5.5V supplies using only four small external capacitors
• Manual shutdown control reduces standby supply current to 1µA for battery-powered applications
• Noninverting monitor receiver remains active during shutdown to support peripheral wake-up functions
• Pin-selectable data rate configuration allows switching between 250kbps and 1Mbps operation

Applications

• Battery powered, hand-held, and portable equipment
• Laptop computers, notebooks, and palmtops
• Modems, printers, and other peripherals
• Digital cameras
• Cellular/mobile phones

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to confirm package type and temperature rating. Confirm RoHS compliance status if required by assembly processes. Check moisture sensitivity level handling requirements prior to soldering. Ensure availability matches project timelines as distribution status may vary.

Selection Notes

Select this component when interfacing TTL/CMOS logic with RS-232 ports in low-power environments. Verify that the system voltage falls within the 3.0V to 5.5V range. Consider the MBAUD pin configuration if high-speed data transmission is required. Ensure adequate decoupling capacitors are available for the charge pump circuitry.

Part Context

The ICL3237 belongs to the Intersil ICL32XXE family of 3V RS-232 transceivers. It serves as a drop-in replacement for legacy MAX3237 devices while offering improved power efficiency. The series is designed for portable electronics requiring reliable serial communication with minimal energy consumption.

Replacement Considerations

The datasheet identifies the ICL3237 as a drop-in replacement for the MAX3237. Verify pinout compatibility and electrical parameters before substitution.