ICL3237CAZ

Overview

The ICL3237CAZ is a low-power RS-232 transceiver manufactured by Renesas Electronics Corporation, operating from a single +3V to +5.5V supply. It integrates five drivers and three receivers, featuring a noninverting always-active monitor receiver for wake-up capability. The device supports selectable data rates of 250kbps or 1Mbps via the MBAUD pin. It includes manual powerdown functionality that reduces standby supply current to 1µA. The component provides ±15kV ESD protection on RS-232 pins and meets EIA/TIA-232 specifications at 3V operation.

Feature Summary

• Integrated on-chip charge pumps generate required voltage levels using only four external capacitors.
• Manual shutdown control minimizes power consumption in standby modes.
• Receiver hysteresis enhances noise immunity during signal reception.
• Pin-selectable data rate allows configuration between standard and high-speed transmission.

Applications

• Battery-powered handheld and portable equipment
• Laptop computers and notebook systems
• Cellular and mobile phones
• Digital cameras and peripheral devices

Procurement Notes

Verify the specific suffix 'CAZ' indicates commercial temperature range and lead-free compliance. Confirm package type matches SSOP-28 requirements. Check moisture sensitivity level handling instructions before assembly. Ensure ordering documentation aligns with RoHS standards.

Selection Notes

Select this component when system design requires low quiescent current and manual power management. Verify interface logic compatibility with 3.3V or 5V CMOS families. Evaluate capacitor selection based on operating voltage to ensure stable charge pump performance. Consider the monitor receiver utility for ring indicator applications.

Part Context

This part belongs to the Intersil ICL32XX family of 3V RS-232 transceivers. It serves as a drop-in replacement for legacy MAX3237 devices. The series emphasizes board space savings through small footprint packaging and minimal external component counts.

Replacement Considerations

The datasheet identifies the ICL3237 as a direct drop-in replacement for the MAX3237. Verify pinout compatibility and electrical specifications match existing designs before substitution.